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What causes 90% of all construction injuries and deaths and are used to help OSHA inspectors improve their effectiveness? - ANSFocus Hazards What is the minimum safe working distance for overhead power lines? - ANS10 feet What is the standard procedure used to safely de-energize equipment on circuits before they are worked on? - ANSLockout/Tagout Which of the following is not true about Material Safety Data Sheets? - ANSThey can be written in any language What are the four focus inspections OSHA compliance officers look for? - ANSFall Hazards, Electrical Hazards, Caught in, Struck by The sizes of pipe are identified by the measurement called the: - ANSNominal pipe size NPS Steel pipe is supplied with the following end finish (es): - ANSPESC, T & C TBE (All of the above) What is a typical type of welded pipe joints? - ANSButt-welded, Socket-welded, Slip-on Flanged (All of the above) List the four principle functions of valves. - ANSStart/Stop, Regulate/Throttle, Relief, Reduce Regulating or throttling flow is done with a: - ANSBoth B and C, (globe and gate valve) Name the two basic types of check valves. - ANSLift and Swing The most common hanger used in piping systems is the: - ANSClevis Never expose any part of a compressed gas cylinder to temperatures above: - ANS125°F The four types of copper tube joints are soldered, brazed, flared and _____? - ANScompression What is the maximum recommended service temperature when a brazed joint is used? - ANS350 degrees F Poor alignment of tube joints will cause: - ANSspacing difference between tubes and fittings After fittings and tubes are cleaned and fluxed they should be assembled and soldered: - ANSas soon as possible Name three basic hitches which can be used for lifting with a sling - ANSStraight, Choker, Basket Which hitch can support the most weight? - ANSBasket hitch Why should the angle between the leg of a sling and the load never be less than 30 degrees? - ANSMore stress loads are applied on slings. What is the weakest part of a chain hoist? - ANSLower hook An oxyacetylene flame has a peak temperature of approximately: - ANS6300°F What is the purpose of slightly opening/cracking a gas cylinder valve before installing a gas regulator? - ANSclear debris Why is it important to ensure that no part of the oxygen handling equipment comes in contact with oil? - ANScauses an explosion What is the constant used to find the travel with a 45 degree offset? - ANS1. What is the constant used to find the offset or advance with a 45o offset? - ANS. Add: 5 1/8 + 1 1/4 + 4 ½ = - ANS10 7/ Subtract: 9 5/8 - 6 15/16 = - ANS2 11/ Multiply: 3 1/5 x 1 ¼ x 1 1/3 = - ANS5 1/
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Divide: 11 ¼ by 2 ½ = - ANS4 1/ Change the following to architectural measurements 3.96': - ANS3' - 11 ½" MSDS is part of the "right to know" law. - ANSt IDLH is an individual's daily level of hazards - ANSf Inhalation, ingestion, absorption and injection are four routes of entry. - ANSt When voltage is applied to a conductor, free electrons: - ANSAre impelled along the conductor The magnetic field around a current-carrying wire: - ANSExists at all points along its length A lamp has a source of 110 volts and current of 0.9 amps, what is the resistance of the lamp?
- ANS122.2 ohms The device used in circuits to prevent damage from overloads is called a: - ANSFuse A thermocouple: - ANSGenerates a small amount of voltage when heated Sensible heat is defined as: - ANSquantity of heat involved to change a substance that can be measured with a thermometer Latent heat is defined as: - ANSamount of heat required to bring about a change in state in a substance Specific heat is defined as: - ANSamount of heat in BTU's required to change the temperature of 1 pound of a substance 1oF. The pressure at a certain depth below the surface of a liquid: - ANSis the same in all directions Pressure is: - ANSforce per unit of area Work is defined as: - ANSforce times distance Name the two main classifications of pump types. - ANSPositive Displacement pumps and Non-Positive Displacement pumps The violent flashing and collapsing of vapor bubbles in a centrifugal pump is called? - ANSCavitation What are two kinds of misalignment that must be checked for when installing pumps - ANSParallel and Angular alignment What steps should be taken before starting a pump for the first time? - ANSPrime, Check suction and discharge valves, Check rotation What are two of the three main items shown on a pump curve? - ANSHead in Feet and GPM Theoretically, how many feet can a pump can raise water vertically by suction? - ANS34 feet The welder is at most serious and immediate risk of - ANSelectrocution The first two digits on welding rod indicate? - ANStensile strength The next to last digit indicates the ____________ of the weld. - ANSposition Utilizing the piping drawing, calculate the measurements for "B": - ANS5' - 5" Utilizing the piping drawing, calculate the measurements for "D": - ANS32' - 3" Utilizing the piping drawing, calculate the measurements for "K": - ANS10' - 8" Utilizing the piping drawing, calculate the measurements for "N": - ANS24' - 2" Utilizing the piping drawing, calculate the measurements for "V": - ANS6' - 8" Utilizing the piping drawing, calculate the measurements for "T": - ANS2' - 0" An increase in pressure will cause the boiling temperature of a liquid to: - ANSIncrease
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Name the portion of the boiler which increase the temperature of the steam so that it does not condense in the turbine. - ANSReheater Name the heat-transfer surface that transfer heat from the flue gas to the boiler feedwater. - ANSEconomizer Name the heat-transfer surface that raises the steam temperature above it corresponding saturation temperature. - ANSSuperheater Name the device used for collecting dust from a flue gas stream. - ANSElectrostatic Precipitator Normally Open (NO) and Normally Closed (NC) indicate the state of a switch when it is: - ANSDe-Energized The measurement unit used to express the rate of flow, refers to the: - ANSVelocity What is a device that changes a voltage signal to a current signal? - ANSE/I transducer A number value on a pH scale indicates the: - ANSAcidity or alkalinity of a chemical As the temperature rises in a closed vessel the pressure: - ANSIncreases USING THE 4 TO 1 RULE THE DISTANCE OUT FROM A WALL THE LADDER SHOULD BE IF THE WORKING LENGTH IS 16FT WOULD BE? - ANS4FT PIPE IS MADE IN WHICH OF THE FOLLOWING SIZES: - ANS1/8" TO 48" PIPE SIZES ARE IDENTIFIED BY A MEASUREMENT CALLED THE - ANSNOMINAL PIPE SIZE UNIFORM LENGTHS OF STEEL PIPE ARE WHAT LENGTH (±1") - ANS21' COPPER TUBE IS DESIGNATED AS TYPE(S) - ANSALL OF THE ABOVE (K,M,L) CAST IRON PIPE HAS GOOD RESISTANCE TO - ANSCORROSION, ABRASION, DEFORMATION (ALL OF THE ABOVE) THE NAME OF ALL SEGMENTS OF DIES USED FOR CUTTING THREADS ARE CALLED - ANSCHASERS WHAT FORMULA MUST BE USED TO CALCULATE THE STEP AHEAD IN A PARALLEL OFFSET - ANS.414 x EQUAL SPREAD THE DEVICE WHICH FORMS A WATER SEAL THAT PREVENTS RAW STEAM FROM ENTERING AND DAMAGING PRESSURE GAUGES IS A(N): - ANSPIGTAIL THE BOILER RETURN LINE IS CONNECTED TO THE STEAM MAIN BY A(N): - ANSEQUALIZING LINE THE STEAM FLOW INTO RADIATORS IN A ONE PIPE GRAVITY RETURN STEAM HEATING SYSTEM CAN BE CONTROLLED BY: - ANSINSTALLING AN AIR VENT WITH A DIFFERENT VENTING CAPACITY THE LENGTH OF PIPE (DRIP CONNECTION) THAT IS NEEDED TO OVERCOME THE PRESSURE DROP IN A ONE PIPE GRAVITY RETURN STEAM HEATING SYSTEM AND RETURN CONDENSATE TO THE BOILER IS - ANS28 INCHES A THERMOSTATIC STEAM TRAP THAT FAILS IN THE CLOSED POSITION WOULD CAUSE A HEATING UNIT TO BECOME - ANSWATERLOGGED IF THE FLOAT IN A F & T TRAP FAILED AND FILLED WITH WATER THE TRAP WOULD - ANSNO CONDENSATE WOULD BE DISCHARGED
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IN A TWO-PIPE GRAVITY RETURN STEAM SYSTEM. THE DEVICE THAT
PREVENTS RAW STEAM FROM ENTERING THE SYSTEM IS A - ANSSTEAM TRAP
IN ORDER TO RETURN CONDENSATE TO A BOILER THE HEIGHT OF THE WATER
COLUMN NEEDED TO OVERCOME THE PRESSURE DROP IN A TWO PIPE
GRAVITY RETURN SYSTEM IS - ANS28 INCHES FOR EACH POUND OF PRESSURE
THE BOILER IS PRODUCING
WHEN STEAM IS SUPERHEATED IT'S - ANSTEMPERATURE IS INCREASED WITH
NO INCREASE IN PRESSURE
WHAT IS LIKELY TO OCCUR IF A PACKING GLAND WAS ADJUSTED TOO
TIGHTLY: - ANSDIFFICULTY IN TURNING THE HANDWHEEL
600WOG ON A VALVE ID PLATE STANDS FOR: - ANSRATED FOR 600 LBS.
WATER, OIL OR GAS AT AMBIENT TEMP.
ON A BALL VALVE, HOW MANY TURNS OF THE HANDLE DOES IT TAKE TO GO
FROM FULL OPEN TO CLOSED? - ANS1/4 TURN
A HARTFORD LOOP IS USED FOR: - ANSPROTECTION FOR LOSS OF WATER IN
THE BOILER
THE COLOR CODE FOR TYPE K COPPER TUBING IS: - ANSGREEN
TO ORDER A REDUCING TEE, YOU SHOULD SPECIFY THE SIZE BY: - ANSLARGE
END TO SMALLER END TO CENTER
WHAT IS THE PURPOSE OF THE OXYGEN AND ACETYLENE REGULATORS -
ANSTO REDUCE THE PRESSURES FROM THE CYLINDERS TO SAFE AND
WORKABLE PRESSURES
THE ________ IS USED TO PROTECT THE WELD PUDDLE FROM
CONTAMINATION IN THE SMAW PROCESS - ANSFLUX
WHAT DOES THE "G" STAND FOR IN 2G, 5G AND 6E WELDING POSITIONS -
ANSGROOVE
WHICH OF THE FOLLOWING IS SOMETIMES USED AS A SHIELDING GAS IN
GTAW PROCESS - ANSARGON
WHAT IS NOT A REQUIREMENT TO SIZE THE STEAM TRAP ON THE HEATING
UNIT - ANSCONDENSATE PUMP SIZE
WHAT IS THE PRESSURE 1/4 THE WAY UP FROM THE BOTTOM OF A PIPE 100'
TALL FILLED WITH WATER - ANS32.
TO DETERMINE THE FACE TO CENTER MEASUREMENT OF A LONG RADIUS 90
DEGREE ELBOW, MULTIPLY THE PIPE SIZE BY - ANS1.
WHAT IS THE C-C OFFSET FOR A 25 1/2" TRAVEL - ANS
A SINGLE LINE DRAWING OF A PIPING SYSTEM REPRESENTS THE -
ANSCENTER OF THE PIPE
THE PIPE SIZE OF A PIPE CHANGES FROM THE ID TO THE OD ON WHAT SIZE
PIPE - ANS14"
A RATING OF 150# REFERS TO A FLANGES - ANSPRESSURE RATING
A VERTICAL LINE IN AN ISOMETRIC DRAWING REPRESENTS - ANSUP AND
DOWN
WHAT IS THE TAKE OFF OF A 6" 45º ELL - ANS3 3/4"
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A pipe stands 252 feet high and is filled with water. What is the pressure at 30 feet above the bottom? - ANS96 psi What is the area of a circle if the diameter is 2 in? - ANS3.14 sq in The change in state from a Liquid to a gas is known as: - ANSVaporization The use of air as a power source is known as: - ANSPneumatics Exits from a trench 150 foot long and 4 foot deep must be located within how many feet of a worker in the trench? - ANS25 feet For an extension ladder to be at the correct angle for safe use on a working surface 20 feet high. The ladder must be located how many feet away from the base? - ANS When the crane signaler's hand is pointed up with his/her finger moving in a circle, it means:
- ANSRaise the boom A sling is weakest in which position? - ANSChoked position The best knot to use when lifting pipe vertically is the: - ANSPipe Hitch with a half hitch Horizontal steam supply piping should be reduced in siz by using: - ANSEccentric reducer (flat on bottom) A float and thermostatic trap is a: - ANSThermostatic / thermodynamic trap A vent is not needed on a condensate receiver when: - ANSMechanical return is used Steam supply using parallel flow is: - ANSSteam and condensate flowing in the same direction A Hartford Loop is used for: - ANSProtection for loss of water in the boiler A bushing is not a good replacement for a reducer because they: - ANSOffer more resistance to flow What is the main reason for the taper on a pipc thread? - ANSEnsure progressively tighter fit The color code for Type K copper tubing is: - ANSGreen The best method to ensure that a plastic Joint is made properly, you should: - ANSInsert pipe into fitting and tum 1/4 tum and hold Which of the following types of clamps are used to dampen a pipe's movement? - ANSSnubber To properly align a flange you must perform what is commonly called a _______ hole: - ANSTwo To order a reducing tee you should specify the size by: - ANSLarge end to smaller end to center The specific Gravity of a liquid can only be measured using the following instrument: - ANShydrometer The symbol π, is equivalent to: - ANS3. The amount of heat it takes to raise one pound of water one degree Fahrenheit is know as a/an: - ANSBTU When should a person designated as a attendant (hole watch) attempt to rescue a worker that is trapped? - ANSNever What is the required distance for a crane to maintain from a 50Kv power line? - ANS10' Which rigging configuration has the greatest sling strength? - ANSBasket When lifting ohjects with sharp edges, you should use a: - ANSSoftener
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What are the three types of steam traps? - ANSThermostatic, Thermoodynamic, and Mechanical What should be done to prepare a flange for the gasket Installation') - ANSRemove any paint or rust A direct acting thermostat is used to: - ANSIncrease the pressure when the temperature increases What is the purpose of the oxygen and acetylene regulators? - ANSTo reduce the pressures from the cyllllder to safe and workable pressures The __________ is used to protect the weld puddle from contamination in the SMAW process. - ANSFlux What does the G stand for in 2G, 5G, and 6G weld positions? - ANSGroove What is Hydronics? - ANSThe science of heat transfer using water What effect does the fill pressure (static) have on a closed loop pumping system? - ANSNone What has the largest effect on pump alignment? - ANSWhat has the largest effect on pump alignment? A cooling tower must have a __________ or be open-site. - ANSBackflow preventer In a refrigeration system, a condensable gas is: - ANSAmmonia What causes pressure drop? - ANSIncrease in friction An up-feed steam heating system has the heating units: - ANSAbove the main How far should a copper tube be inserted into a cup for a brazed joint? - ANSAll the way to the shoulder Capillary action is used in: - ANSSolder Joints Which of the following is sometimes used as a shielding gas in the GTAW process? - ANSArgon To sense the temperature remotely from the thennostat location you would use: - ANSRemote Bulb All of the following are process control elements except: - ANSPiping What would be the result of an incorrectly installed orifice plate? - ANSErratic Readings Where should the high pressure condensate be piped to before entering the receiver? - ANSFlash Tank What is not a requirement to size the steam trap on a heating unit? - ANSCondensate Pump Size A tag line should be used on a crane lift. - ANSAlways To stop all crane movement the ________ signal should be used. - ANSDog Everything What does GFCI stand for? - ANSGround Fault Circuit Interrupter When loosening the bolts on a flange one should: - ANSLoosen the bottom bolts first With a high pressure valve you should never _______ under pressure. - ANSRepack it One pound of water pressure is equal to: - ANS2.31 ft A simple example of a lever is: - ANSA pry bar When a liquid changes immediately to a vapor it is called: - ANSFlashing To determine the travel for a 45 degree rolling offset you would: - ANSMultiply the length of the hypotenuse of the roll and the set by 1. Convert 7/16" to a decimal. - ANS.
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The pressure exerted by a liquid at rest is: - ANSHydrostatic The letters MSDS stand for: - ANSMaterial Safety Data Sheets How often should the atmosphere be tested in a confined space? - ANSContinuously An exit from a trench should be no more than: - ANS25' from any worker To raise the boom of a crane: - ANSPoint the thumb up Steam condensate lines should use: - ANSSch 80 Steel pipe Steam condensate lines should be installed on: - ANSRoller hangers What is installed after the isolation valve and before the trap union on a standard trap assembly? - ANSStrainer A rating of 300# refers to a flange's: - ANSPressure Rating A mixing valve has ______ inlets and _____ outlets. - ANS2 and 1 What instrument is best for measuring vacuum? - ANSManometer Why can the flux be omitted in a brazed joint? - ANS What do the first two digits mean in E7018 electrodes? - ANSThe tensile strength of the rod in PSI times 1000 What are the main differences between soldeflng and brazing? - ANSThe temperature that the joints are made, the flux, and temperatures of the system What temperature does water boil at sea level? - ANS212° F What is on the low side of the vapor compression cycle? - ANSThe evaporator What type of copper is recommended for refrigeration? - ANSType L What is the expansion and compression of water vapor in a pump? - ANSCavitation Why is it necessary to use flux on a soldered Joint? - ANSTo chemically prepare the pieces for soldering Annealing copper - ANSSoftens it What is capillary action7 - ANSThe flow of a liquid into a small space Which of the following is not a confined space? - ANSA service tunnel connecting two buildings Before attaching regulators to an oxygen cylinder - ANSBlow the valves for a moment What should be done first when preparing a copper joint? - ANSClean all surfaces When a fluxed joint is overheated it will not: - ANSFuse Guides are used near: - ANSAnchors What is used to soften PVC and remove the gloss? - ANSPrimer A device that mechanically attachtes to the side of a flange on a beam is called: - ANSBeam clamp Why is it necessary to use roller hangers? - ANSTo allow for thermal movement What type of hanger uses a spring that splits the rod? - ANSSpring What type of expansion joint does not utilize mechanical movement? - ANSExpansion loop What type of valve should be used to bypass a control valve? - ANSGlobe valve To assemble a 4 bolt flange: - ANSSet up opposite bolts fairly tight, then tighten all bolts equally for inspection purposes What is the purpose for a weep hole in a saddle pad? - ANSAllow moisture to escape
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To fabricate a 60 degree elbow from a 90 you would: - ANSLevel the 90 in horizontal position determine inside arc, backside arc and face to center dimensions for 60 degree ell, mark and cut. What is the sum of all of the angles in a triangle? - ANS18 0 What is the area of a circle whose diameter is 12" - ANS113. One foot of water exerts: - ANS.433 PSI Where is a bourdon tube found? - ANSIn a pressure gauge A gallon of water at 60 Degrees F weighs: - ANS8.33 lbs Convert - 40 degrees F into C - ANS- 40 How high must you extend a ladder above the roof or deck? - ANS36" The proper way to extinguish a fire is to: - ANSPoint at the base and sweep the base with the extinguisher The most that a crane should be loaded is: - ANS100% of the rated capacity What does the crane signal with the index finger pointed forward in a swirling motion signal?
- ANSNothing What does the term never saddle a dead horse mean? - ANSArrange a wire rope clamp so that the dead end has the u bolt What causes water hammer? - ANSlncorrect valve operation Condensate lines should be pitched - ANSIn the direction of flow A condensate receiver is used when: - ANSWhen it is impractical to pipe the condensate directly to the boiler Which way should the bevel face on an orifice plate? - ANSDown Stream What is the best gasket to use on a flanged joint on medium pressure steam? - ANSSpiral Wound What is the standard pressure range for a pneumatic signal? - ANS3-15 PSI Which one of the following is typically a final control element? - ANSValve Which one of the following measures and takes action? - ANSController What type of sensor is directly in the process stream? - ANSImmersion The 6G welding position is: - ANSWith the weld at a 45 degree angle Soidered joints should never be used on systems above: - ANS250 Degrees When a soldered joint is overheated - ANSThe flux burns and the joint becomes ineffective In a Hydronic heating system, units at the top of the system not heating are likely to be: - ANSAir bound A fan coil uses ____ to distribute heating or cooling to the space. - ANSForced convection A system in which the refrigerant is in the shell and cools the fluid in the tubes is: - ANSFlooded On a centrifugal pump what is rotated by the motor? - ANSThe impeller What causes water to move in a hydronic system? - ANSThe pump creates a differential in pressure that moves the water The correct measurement for elevation "A" in the drawing below is: - ANS43'-6" The correct measurement for dimension "B" in the drawing below is: - ANS5'-5" The correct measurement for dimension "C" in the drawing below is: - ANS39'-8"
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In what ways are steam heating systems classified? - ANSOne pipe and Two pipe system A ___________ is an arrangement of piping between a steam boiler's header and its gravity- return piping. - ANSHartford Loop A Pop safety valve, that is set to open at 15 psi will close when the pressure is reduced to _______ psi. - ANS What type of pump is normally used as a feed water pump? - ANScentrifugal Hydronics is a heating system for a building in which the medium for carrying heat throughout the structure is circulating water. - ANSt Where must the expansion tank be located in a gravity hot water system? - ANSAbove the highest convector What is the maximum working pressure of the average hot water boiler? - ANS30 psi What type of copper tubing joint requires the use of a ferrule? - ANScompression What are 3 fuel gases used for heating pipe or tubing? - ANSMAPP, acetylene, and propane The purpose of the foot switch on a power-operated pipe cutting and threading machine is to:
- ANSact as a safety device to shut off the motor if the operator's foot is removed from the swich Which of the following is not a reason for using cutting oil when threading pipe? - ANSto protect the threads from rust A factor to consider in pipe hanger and support systems is: - ANSthe movement of the fluid in the pipe, the temperature of the fluid in the pipe, vibration, (All of the above) Which of the following constants are used when working with circles and areas? - ANS.01745, 3.1416 and. If the travel of a 45 degree offset is known, what formula can be used to find the advance? - ANStravel ÷. The specific weight of mercury is: - ANS13. Name three methods of transferring heat. - ANSconduction, convection and radiant A neutral reading on a PH scale is ____________. - ANS7. Standard atmospheric pressure at sea level is __________________: - ANS14.7 psia One gallon of water weighs ______ lbs: - ANS8. An increase in pressure will cause the boiling point of water to: - ANSincrease Which of the following is the decimal equivalent of 5/8"? - ANS. What is the minimum safe clearance between cranes and energized power lines operating at 50kV or below? - ANS10 ft Ladders with visible defects, such as broken rungs, cracked side rails, or broken steps must be: - ANStagged and removed from service The only entity that has the responsibility and authority to appoint the competent person is: - ANSThe employer Which of the elements of a wire rope aid in absorbing "Shock Loads"? - ANSthe core Identify the hand signal: <(thumbs pointing out) > - ANSextend boom or trolley out The pipe that connects the steam header to the boiler return connection is the: - ANSequalizing line A thermostatic steam trap that fails in the closed position would cause a heating unit to become: - ANSwaterlogged
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The device that controls the pressure in a low pressure steam boiler is called a: - ANSpressuretrol A diamond on an instrumentation loop diagram encloses information concerning: - ANSset point Which component in a closed control loop is the primary element? - ANSsensor The main cause of undercutting is: - ANStoo fast of a travel rate When changing pipe sizes in the horizontal supply or return lines of a two-pipe hot water heating system use: - ANSeccentric reducers, flat on top If a pump is operating under static suction lift conditions, a __________________ may be installed in the suction line to avoid losing the pump's prime each time the pump shuts off. - ANSfoot valve The color code for type "K" copper tube is: - ANSgreen The shape of a p - trap forms a/an: - ANSpositive trap seal In medical gas installations a purge is required while brazing, along with what percent penetration? - ANS100% The weight of 47 gallons of water is ____________ lbs: - ANS391. How many square inches in a square foot? - ANS What is the Offset Constant for a 45 degree angle: - ANS1. How many gallons of water per cubic foot? - ANS7. What is the weight of one cubic foot a water in pounds? - ANS62. What is the weight of one gallon of water? - ANS8. What is the pressure exerted by one foot of head water? - ANS0.43 lbs psi What is the formula for the area of a rectangle? - ANSL x W What is Pi? - ANS3. What is the head of water in a foot for one psi? - ANS0. What is the formula for finding an area of a circle? - ANS3.14 x R The formula for the volume of a cylindercal tank: - ANS3.14 x R2 x H The formula for the Circumference of a circle: - ANS3.14 X D The formula for a rectangular tank? - ANSL x W x H How many cubic inches in a cubic foot? - ANS Formula to find the offset of a right triangle? - ANS0.707 x travel What is the pressure of one foot of water head? - ANS. The formula for a perimeter? - ANS2L x 2W Atmospheric pressure pushes downward on the tops of objects, but it does not push upwards on the bottoms of the objects. - ANSf A bitmetal strip is two metals brazed together. - ANSt Wrought iron is a non-ferrous metal. - ANSf Flux inclusions frequently result from the improper feeding of solder into the joint. - ANSt Lines that are equal distant everywhere are perpendicular lines. - ANSf A non-isometric line can be drawn by connecting the two points which lie on different isometric lines. - ANSt In an isometric drawing, an extension or a dimension line can be, but does not have to be, an isometric line. - ANSt
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them. Dirt walls will slough off, causing dangerous overhangs. The longer a trench is left unsupported, the greater the chance of a cave-in. A competent person means one who is capable of identifying existing and predictable hazards in the surroundings or working conditions which are unsanitary, hazardous, or dangerous to employees, and who has the authorization from the employer to take prompt corrective measures to eliminate them. - ANSt Scaffolds shall be properly braced by cross or diagonal braces. - ANSt When force is applied to a pipe wrench it is essential to have good hand-eye coordination. When working on a scaffold or in an unfamiliar position, it is important to be aware of the height you're working and to maintain mental control. - ANSf Random selected electrically operated power tools shall be periodically inspected by a competent person with the proper instruments. - ANSf A [blank_1] is a device that monitors the amount of current flowing through the hot wire of an electrical load and compares it to the amount of current coming back through the neutral wire. - ANSground fault circuit interrupter What are three essential elements to produce an ordinary fire? - ANSFuel, Heat, Oxygen Who is responsible for the daily inspection of trenches and excavations? - ANSCompetent person Flashback arrestors eliminate the risk of an explosion in the regulator and cylinders. - ANSt A retainer pin is located on the main block and is used to stop the chain clamp from kicking up. - ANSt Choose the proper order of the two steps for extinguishing the torch flame after cutting or welding - ANSTurn the oxygen preheat valve to the closed position, Turn the fuel gas torch valve to the closed position. The electric arc is made between the work and the tip end of a small metal wire, the electrode. - ANSt List four component parts of a hold-down clamp.Chain, Bracket, Hook, Fine adjustment mechanism - ANSChain, Bracket, Hook, Fine adjustment mechanism Welders shall cut or weld only where all safety precautions have been met. - ANSt Fuel gas hose and oxygen hose are not easily distinguishable from each other. - ANSf Jackbars are located on the hold down clamp chain. - ANSt The hazard of slipping while welding is one of the most serious and immediate risks facing you as a welding operator. - ANSf Helmets, handshields, and goggles shall be well maintained, and should not be transferred from one employee to another without being cleaned. - ANSt Check oxyacetylene equipment for leaks using an approved oil free leak detection fluid. - ANSt High silicon iron pipe and fittings are penetrable to acidic food waste. - ANSf A valve marked only 200 W.O.G. may be used for steam service. - ANSf Valves should be placed in convenient locations free from exposure of being damaged. - ANSt What does the abbreviation ASTM stand for? - ANSAmerican Society for Testing Materials Both hard temper water tube and soft temper water have incised markings. - ANSt
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Suppressors, while dampening vibration, can also be used to carry some of the weight of the piping. - ANSf All types of valves are available in a complete range of sizes. - ANSf A metering ball valve is a control valve that allows instantaneous selection of any given flow rate within its range. - ANSt What are two advantages of welding pipe? - ANSneatness and compactness The _______- weld is compatible for use with small size piping. - ANSsocket Pipe is made in the following sizes: - ANS1/8" to 48" in diameter Flanges are made in sizes as small as: - ANS1/2" Steel pipe is produced according to standards and specifications by a number of standardizing groups. - ANSt Pressure regulators are used to increase outgoing pressure. - ANSf What is the proper name for FRP materials? - ANSFiberglass reinforced pipe Temperature and pressure are the only considerations which must be considered when installing valves. - ANSf The most widely used copper tube is: - ANSASTM B- 88 Needle-type globe valves are sometimes used for exacting flow regulation. - ANSt The diaphragm on a diaphragm valve is used to seal the bonnet. - ANSt After tightening the nut, on a compression type fitting, handtight, tighten with a wrench: - ANS1 1/4 to 2 1/4 turns The correct angle for most flared fittings in the pipe industry is 30° and sometimes 52°. - ANSf Heat fusion can be used to join the following types of plastic piping materials: - ANSboth PP and PE A union is essentially a pipe coupling. - ANSt Only Schedule ________ PVC and CPVC pipe can be threaded. - ANS Pipe hangers and pipe supports perform the same function of keeping the pipe where it should be. - ANSt A pre-engineered spring hanger does not place a load on the system. - ANSf The most common method of joining copper tube is by soldering with the use of a ________ fitting. - ANScup-joint Head in feet of water column can be converted to pounds per square inch (psig) by dividing the total static head by .433 psig/ft. - ANSf The violent flashing and collapsing of vapor bubbles in a centrifugal pump is called ______________. - ANScavitation See Fig. 1. What is the Δ P if the suction gage reads 69.5 psig at position 3 and the discharge gage reads 100 psig at position 4? - ANS30.5 psig The compressor used in medical air systems that insures 100% oil-free air is the __________ piston compressor. - ANSoil-less Storage of water in an automatic water system is in a/an ________ tank. - ANSpressure A pump is a device through which an external source of power is used to apply a force on a fluid. - ANSt
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Wire rope should be uncoiled in the same manner as manila rope. - ANSf Wire rope is seldom used for slings in hoisting heavier materials since the flexibility is not as good in wire rope as it is in manila rope. - ANSf It is okay to be under a lifted load as long the pilot is able to see you. - ANSf Is copper a ferrous or non-ferrous metal? - ANSnon-ferrous What is the maximum service temperature recommended for copper tube when soldered joints are used? - ANS250°F The suggested shade number for filter lenses for torch brazing is: - ANSfour How is the size of ACR copper tube designated? - ANSactual outside diameter An oxyacetylene flame has a peak temperature of about _______°F. - ANS When a flashback occurs which torch valve should be closed first, oxygen or acetylene? - ANSoxygen In order to close an acetylene pressure regulator, the adjusting screw is turned _____________ until the tension is off the spring. - ANScounter-clockwise Brazing and soldering produce hazards such as: - ANSFumes, Gases, Burns, Heat stress, All of the above A flux used for soldering and brazing must meet the requirements of ASTM Standard _____.
- ANSB 813 __________ joints are often used for connecting underground lines. - ANSflared A multi-flame heating tip is basically a: - ANSlarge welding tip What is the maximum service temperature recommended for copper tube when brazed joints are used? - ANS350°F _________________ are used to connect copper tube to other types of piping material. - ANSadapter An air-acetylene torch is not generally recommended for a brazed joint with copper tube larger than ________. - ANS1" Before a vacuum pump is started, all of the water must be drained from the pump's receiver. - ANSf The pressure rating of a blow-down tank must be at least twice the maximum working pressure of the boiler. - ANSf Vaporzation, which occurs below the boiling temperature and only at the surface of liquid is:
- ANSevaporation With a increase in pressure, the latent heat content of one pound of steam will decrease. - ANSt Fier tube and water tube boilers are used as high pressure boilers. - ANSt The water level in a boiler feed pump receiver is mechanically maintained. - ANSt A dry pipe must be used in the design of a boiler to insure the delivery of dry steam. - ANSf Swing joints should always be installed in a steam heating system in order to accommodate expansion of the piping. - ANSt Vaporization, which occurs throughout a liquid, with bubbles of vapor breaking through the surface of the liquid is called: - ANSboiling Reducing the pipe size in a horizontal steam main requires the use of a concentric reducer. - ANSf
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On water tube boilers, how high is the lowest visible part of the sight glass set above the lowest permissible water level - ANS2" Elements mounted inside of baseboard radiation units located inside of a building near the floor line and against the outside wall are now in common use. - ANSt Air is eliminated from a vapor steam heating system by a/an: - ANSAir eliminator Superheated steam is steam that is heated above the corresponding saturation trempature with no increase in pressure. - ANSt In order to return condensate to a boiler, the height of the water column needed to overcome the pressure drop in a two-pipe gravity return system is: - ANS30" Stop and check valves require steam pressure to open them. - ANSt Employees shall be provided with the particular personal protective equipment necessary to protect them from hazards. - ANSt Screwdrivers are designed for: - ANSturning screws A pin punch should not be used to start driving out a pin because the punch may break. - ANSt A convenient tool for measuring the circumference of a pipe is: - ANStape rule Cables on drain cleaning machines should be siphoned after each use to prevent damaging effects of drain cleaning compounds. - ANSf What is the term applied to the total of all the factors which make up the head against which the pump must operate? - ANStotal dynamic head Water at atmospheric pressure boils at a constant temperature of ______ at sea level. - ANS212°F What method is normally used to control the fan coil units? - ANSCycling of the fans with a room thermostat. What causes a high head pump to become starved? - ANSIf the strainer is clogged In a two pump system, the boiler recirculation should be less than the system circulation. - ANSf Chiller units can be located in areas where the air or ambient temperature drop below freezing at the unit. - ANSf What does a reading of 40% relative humidity indicate? - ANSat the air temperature given, the water vapor held by the air is only 40% of the amount which could be absorbed by the air. A two-pipe reverse return system should be provided with diversion tees at the roomunit take-offs. - ANSf What is pressure drop? - ANSThe loss of fluid pressure due to friction created by valves and/or uneven inner surfaces in a piping system. If a package liquid chiller is located in a small room, negative mechanical ventilation and even cooling must be provided. - ANSf A circle is a closed curve all of whose points are on the same plane. - ANSt Percent grade is equal to total fall _______ by distance - ANSdivided Fig. 1 is a 60 ° parallel pipe offset with equal spread. Compute C - C measurement D. D = _______________ - ANS24 1/4" C 90° ell-C 60° ell What is the pressure exerted at the base of a water riser by a column of water in the riser 85' high?
