Download ABSA Part A Practice Test (Questions With Answers) | LATEST UPDATE 2024/2025 and more Exams Physics in PDF only on Docsity!
ABSA Part A Practice Test
(Questions With Answers) | LATEST
UPDATE 2024/
Which reference to scalars and vectors, a space diagram: a. Illustrates the position of the planets and the stars b. illustrates a system of vectors c. shows the relationship of the scalars to the vector d. illustrates a system of scalars e. shows the relationship of time to the vector B The flow of heat from molecule to molecule within a substance or from molecule of one body to those of another body in direct contact with it is defined as: a. Conduction b. Convection c. Specific heat d. Latent heat of fusion e. Absolute pressure A Water is the best extinguisher for: A. An oil fire B. A gas fire C. An electrical fire D. A wood fire E. A metal burning fire D The coefficient of friction is defined as: A. the downward force on the two services in contact B. The force parallel to the surface required to start an object moving C. The reaction normal perpendicular to the surface D. The force parallel to the service required to keep an object moving at a constant linear velocity E. The ratio of the force required to move up body to the E To start a body moving which of the following must be overcome? A. Kinetic friction B. Static friction C. Fluid friction D. Rolling friction E. Normal force B
Foam extinguishers are recommended for? A. Class A and Class C fires B. Class C and Class B fires C. Class A and Class B fires
D. Angular with E. Angular against B Stepper motors have/are: A. Very high speed operation B. Minimum torque when at standstill C. Low reliability D. Slow starting E. Low efficiency E are pieces of slag or tungsten that are trapped in a weld deposit A. Porosity B. Undercut C. Incomplete fusion D. Incomplete penetration E. Inclusion s E NDIR Detectors detect: A. CO/CO B. SO C. NOx D. Relative humidity E. CH 4 A Brass is an alloy of A.Copper and bronze B.Copper and lead C. Brass and lead D. Copper and tin E. Copper and zinc E The area under a velocity vs. time graph equal: a. Distance b. Speed c. Acceleration d. Displacement e. Average velocity D We have an expert-written solution to this problem! A single vector which can replace a system of actors and has the same effect is called a a complainer vector b resultant
c concurrent factor D scholar E concentric vector B Which of the following is an advantage of gear drives over belt drives? a overall drive length can be longer b there is no slippage c. gear drives require minimal maintenance d. gear drives are more versatile e. gear drives requires no maintenance B In a Venturi tube blank or more of the upstream pressure is recovered down stream A.80% B. 90% C. 70% D. 100% E. 60% B Ammeters are connected with the negative or black lead connected to the? A. positive side of the circuit B. north pole of the circuit C. Negative side of the circuit D. Switch of the circuit E. Neutral side of the circuit C Any substance which cannot be broken down into other substances or ingredients by chemical means is? A. A mixture B. A compound C. An electron D. An atom E. An element E The periodic table A. Arranges elements in equal numbers of columns and rows B. Arranges elements in descending order of atomic number C. Reflects the similar chemical properties of some elements D. Has 16 distinct groups E. Provides no information besides the chemical symbol of the element C All maintenance work done on portable fire extinguishers is required to be: A. Completed on all extinguishers in the plant at the same time B. Performed at the worksite in case they are required for emergency service C. Contracted out to a certified service company
D. Be removed at any time E. Never be rectangular B Soldering is done at temperatures... A. Above 450Ā°C B. Below 450Ā°C C. Above 500Ā°C D. Below 650Ā°C E. Below 1650Ā°C B The material safety data sheet is supplied by the A. Occupational health and safety committee B. Plant supervisor C. Federal government D. Supplier of the controlled product E. Person using the controlled product D A controlled product may enter the body by ingestion inhalation A. through an air B. Through the skin C. Tracked sensation D. Synergistically E. Through dead cells such as hair, nails, etc. B Oxygen and acetylene cylinders should be stored A. In a warm dry place B. Together whenever possible C. Inside the building next to the consuming equipment D. At least 6 m apart E. At least 3 m apart D Halogen agents are A. Safe until they make contact with the combustion process B. Themselves toxic C. The most highly recommended for class B and class C use D. Able to maintain cylinder pressure themselves regardless of temperature E. Gradually replacing dry powder units B A proper employee/worker training program is best demonstrated A. Passing NOHS exam with a min of 60% B. Successful completion of a company program. C. Proof of the workers ability to work safely and understand procedures regarding control products and systems
D. A record of the workers absentee and number of incident reports E. Random testing of procedures C Gas cylinders should be stored upright in order to. A. Minimize space requirements B. Avoid liquified product from escaping C. Keep them from rolling during transportation D. Lessen the chance of a back injury during movement E. Enhance proper identification B A fully charged oxygen cylinder has a pressure of about A. 10, 000 kPa B. 15,000 kPa C. 20,000 kPa D. 25,000 kPa E. 5000 kPa B What is a characteristic of a series wound generator? A. Output voltage rises sharply from minimum load to full load B. Load decreases as field strength increases C. Rising output voltage vs load D. Decreasing output voltage vs load E. Input current remains the same A A hydrostatic test of sprinklers and stand pipes may be done every 3 to 5 years depending on A. structural integrity B. Local codes C. Manpower available D. Location E. Their performance D Which statement concerning belt trains is false A. Belt trains are used to change speeds of pulleys B. Belt trains are used to change power transmission of belts C. Belt trains transmit less power than gear trains of comparable size D. Pulleys in a train all rotate in the same direction E. Trains are connected by a single belt E Sulphur oxide's in fluegas are undesirable because they? A. Use up the sulphur in the fuel be. B. Indicator of incomplete combustion in the furnace C. Combine with sunlight to produce smog
Noise sources over what level are potentially hazardous to hearing A. 100 dB in above B. 60 dB and above C. 120 dB and above D. 80 dB and above E. 40 dB and above A Saturated seen steam is? A. Steam saturated with moisture B. Steam at saturation temperature C. Steam that is neither wet nor dry D. Contains more than 50% moisture E. Required for all superheaters B Whose responsibility is it to ensure that an emergency plan is in place to deal with incidents where injuries may occur? A. Safety committee B. OH&S committee C. Employee D. Employer E. Boiler inspector D Mechanical centre fugal collectors are not suitable for the collection of A. Very coarse particles B. Coarse particles C. Fine particles D. Rough particles E. Heavy particles C Modulating thermostat is equipped with a A. Piezoelectric device B. Solenoid relay C Potentiometer D. Thermistor E. Receiver C The voltage applied to an electrostatic precipitator is between A. 10,000 volts AC & 1,000,000 volts AC B. 1000,000 volts AC & 1,000,000,000 volts AC C. 10,000 volts DC & 100,000 volts DC D. 100,000 volts DC & 1,000,000,000 volts AC E. 100,000 volts AC & 10, volts DC C A hydrostatic test is required on most fire extinguishers every A. year
B. Two years C. Three years D. Four years E. Five years E When calculations are made with respect to the application of the act 10 kW is equal to A. 0.5 mĀ² of heating service B. 2 mĀ² of heating service C. 10 mĀ² of heating service D. 5 mĀ² of heating service E.. 1 mĀ² of heating service E Sprinklers used in a deluge system. A. Have the same design as those used in other systems B. Have larger sizes in those used in other systems C. Have smaller sizes than those used in other systems D. Have their operating elements removed E. Are globe valves D When using radiographic inspections defect such as crafts and porosity show up as? A. Lighter shadows on the photographic paper B. Wave signals on a small screen C. Darker shadows on the photographic paper D. Darker shadows on a penetrameter E. Lighter shadows on a penetrameter C Cooling towers A. Remove sensible heat only from condensate B. Prevent thermal pollution of rivers and lakes C. Cannot be used during winter. D. I'll have fans E. Are mandatory for all power plants B Fly ash is removed from bag filters by a system of A. Rollers B. Hammers C. Electrostatic precipitators D. Pinners E. Rapper s E Solder connections are usually used on A. Steel lines B. Copper lines C. Aluminum lines
Usually 90% of the NOx formed during combustion is A. NO B. N2O C. NO D. N2O E. N2O 5 A In an optical pyrometer comparison is made to measure the temperature A. Radiation B. Contrast C. Brightness D. Voltage E. Curre nt C Blank is believed to be responsible for 16% of global greenhouse gas in missions A. Nitrous oxide B. Methane C. Carbon dioxide D. CFC's E. Ozon e B Employers must ensure employees wear self-contained breathing apparatus when A. Entering a coal bunker for repairs B. Handling toxic chemical dust C. Fighting fires in the plant D. Entering any confined spaces E. There is danger to life or health due to reduced oxygen content E Dampers used for precise flow control A. Variable drain inlet B. Parallel C. Opposed D. Pilot position E. Horizont al C Power engineers are A. Safety Code officers in a power plant automatically B. Skilled workers who operate and maintain the equipment in a power plant C. Qualified to perform any electrical jobs in a power plant D. Qualified to make design changes in a power plant E. Qualified to perform any welding jobs in a power plant B Number of atoms in a mole is called A. Atomic number
B. Molecular mass C. Neutrons D. Electron configuration E. Avogadro's number E There are four weighing scales used to measure noise A. A,B,C,S B. 0- C. A,B,C,Z D. B,C,P,Q E. A,C,D, Z E One cubic metre is equal to A. 1 dmĀ³ B. 1,000,000 L C. 1000 L D. 100 dmĀ³ E. 1000 cmĀ³ C Transmitters convert a process physical quantity such as level, pressure, flow or temperature to the representative pneumatic analogue signal using, a signal A. Digital signal B. 0-25 kPa C. 20-100 kPa D. 4-20 mA E. 0- kPa C Velocity may be defined as A. Speed B. Linear speed C. Rotational speed D. Speed in a given time E. Speed in a given direction E Iron sulphide if allowed to dry out will A. Burst into flames in the presence of air B. Make an excellent class D fire extinguishing agent C. Enhance the effects of static electricity D. Emit toxic fumes E. Absorb moisture from railway tank cars A Post fluorescent testing is used to test for A. Carbon monoxide B. Carbon dioxide C. Nitrous oxide
D. The liquid will burn E. The vapors become inert B 1 kg of hydrogen the liver is about times more energy than 1 kg of carbon A. 3. B. 4. C. 5. D. 6. E. 7.5 B The transfer of heat by blank involves the movement of a fluid a liquid or a gas A. Convection B. Expansion C. Conduction D. Contraction E. Radiatio n A Portable fire extinguisher maintenance is required by NFPA code to be performed by a certified agency A. Annually B. Every two years C. At every product shipment D. Every three years E. Every five years A Absolute pressure is the sum of and pressures A. Gauge & atmospheric B. Standard & deviation C. Minimum & maximum D. Positive & negative E. Above & below A When a filler rod and very hot flame are used in a welding process the weld method is A. Submerged arc welding B. Heli-arc method C. Electric arc method D. Oxy-acetylene method E. Spot-weld method D The temperature of a body is a measure of A. The quantity of heat in the body B. The quantity of cold in the body C. The quality of heat in the body
D. The quality of cold in the body E. The quantity of electrons in the body A The evaporation of a liquid A. Takes place at any temperature B. Is a physical change C. Increases as the pressure upon the liquid increases D. It's a chemical change E. All of the above B We are more than one of you is shown in the drawing A. Width is common to the front and top views B. Height is common to the front and side views C. Depth is common to the top and side views D. Hidden lines are used E. All of the above E Section 7 "Rules for Care of Power Boilers of the ASME Code Book are: A. Rules that are strictly enforced by ASME. B. Supported rules to promote safety in boiler operation C. Applicable only two large high pressure boilers D. Rules develop to produce best economy of operations E. Rules that all boiler operators must follow B When working inside the boiler the maximum voltage of the lights you must use is A. 12 V B. 60 V C. 110 V D. 220 V E. 220 V or less provided you were grounded A A safety committee is responsible for A. Repairing safety devices on equipment B. Supplying special courses C. Setting down the safety policy of the plant D. Promoting all safety aspects in the plant E. Making sure management response to safety concerns D MSDS means A. Material specification data system B. Material specification data sheet C. Manufacturers specifications data sheet D. Manufacturers safety data sheet E. Material safety data sheet E
D. 4,
E.
C
I'll check valve is a valve that A. Is required on all boilers B. Allows flow into directions C. Allows flow at regular intervals D. Does not allow any flow at all E. Allows flow in one direction only E When steam is first being introduced into a piping system, it is important that: A. All valves be wide-open B. All drains be closed C. All valves be closed D. All condensate water is drained E. All bypass valves are closed D Convection superheaters are located: A. Away from the fire B. By the burner C. In the radiant zone D. Before the superheaters E. At the back end of the boiler next to the boiler tank A And orifice plates advantage over a flow nozzle is? A. Better accuracy B. Accommodate greater flow C. Requires fewer sections of straight pipe D. Easier to install E. Readily available D The difference between an induction motor and a three phase alternator is that in an alternator A. DC current is applied to the rotor B. AC power is produced in the rotor C. AC power is supplied to the rotor D. DC current is applied to the stator E. DC voltage is supplied to the stator A Modulating combusting combustion controls: A. Regulate the steam and feed water supply B. Regulate the fuel and air supplies C. Control the oil atomizer D. Control the back draft damper E. Modulate the water supply proportionally
B
Kirchhoff's current law can be stated as: A. The sum of currents flowing away from any point of an electric circuit must be equal B. The algebraic sum of potential differences in the path C. The sum of currents in any circuit be equal to the resistance within the circuit D. The sum of currents flowing away from any point in an electric circuit must be equal to the sum of the currents flowing toward the point. E. The sum of current within a Wheatstone Bridge D Buy metal thermometers consist of two thin metal strips bonded together. The metal strips welded together must have a large difference in their A. Coefficient of length B. Coefficient of expansion C. Electrical Conductance D. Resistance E. Conductivi ty B If the resistance in a circuit was kept constant and he applied voltage was increased, there would be A. A corresponding decrease in current B. No charge in current C. Corresponding increase in current D. Small change in resistance E. Large change in resistance C AC motors A. Current is applied to lap windings B. Require brushes to induce power to rotor C. Current is supplied to the stater D. Slip rings on the stater E. Are hardly used in industry C Transformers are cool by:
- Spraying water over the coils
- Placing the core in an oil filled tank
- Forced cooling by fans
- Using pyrene as coolant A. 1, B. 1, C. 2, D. 3, E. 1,4 C
