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The mission of the Occupational Safety and Health Administration (OSHA) is: - Ans>>> To send every worker home whole and healthy every day Electricity travels in closed circuits, and its normal route is through a conductor. Electric shock occurs when: - Ans>>> Your body becomes part of the circuit Workers need to take which of the following common-sense steps to protect themselves from falls through skylights and roof and floor openings? - Ans>>> -- Never sit on, lean against, or step on a skylight lens or any covering placed over a hole in a roof or floor -- Guard or securely cover all holes created or uncovered before leaving a work area -- Always use a PFAS when working over an unguarded or uncovered opening more than six feet above a lower level
The two steps for avoiding hazards that are always taken before the need for PPE is considered are: - Ans>>> Workplace and engineering controls The three main scaffold types are aerial lifts, supported scaffolds and: - Ans>>> suspended scaffolds Because using cranes or derricks to hoist personnel poses a serious risk to the employees being lifted, any cranes and derricks that hoist personnel must: - Ans>>> -- Be placed on a firm foundation and be uniformly level within 1 percent of level grade -- Move the personnel platform slowly and cautiously and have rotation-resistant rope with a safety factor of 10 -- Have all brakes and locking devices set when the occupied personnel platform is in stationary position If the use of a power tool can result in flying sparks, metal shavings, wood chips, splashes, or other debris, workers should: - Ans>>> Protect themselves by wearing proper PPE OSHA defines an excavation as: - Ans>>> Any man-made cavity, depression, trench or cut in the earth's surface formed by earth removal
Hot wires, ungrounded wires that can cause a shock if you touch them, are usually: - Ans>>> black or red More than 50 percent of electrocutions are caused by a worker coming in direct contact with: - Ans>>> energized power lines The OSHA standard requires flexible cords to be rated for: - Ans>>> Hard or extra hard usage What is the most frequent violation of OSHA electrical standards? - Ans>>> improper grounding of circuitry and equipment The three elements of a basic program for electrical safety are: - Ans>>> recognize, evaluate and control All portable electric tools that are damaged shall be: - Ans>>> Removed and tagged "Do Not Use" If you have a three-prong plug and a two-hole receptacle, it is acceptable to: - Ans>>> Use an adapter with an adapter wire connected to known ground
All hazards involved in the use of power tools can be prevented by following five basic safety rules: Keep all tools in good condition with regular maintenance; examine each tool for damage before use; operate according to the manufacturer's instructions; provide and use the proper protective equipment; and: - Ans>>> use the right tool for the job Live parts of electric equipment operating at 50 volts or more must be: - Ans>>> guarded against electrical contact While any employee is exposed to contact with parts of electric equipment or circuits that have been de-energized, the circuits energizing the parts shall be: - Ans>>> Locked out or tagged out or both Low voltage does not mean low hazard. - Ans>>> true The two best means of avoiding electrical shock or injury when working with power tools are: - Ans>>> Insulation and grounding The majority of today's power line accidents occur because: - Ans>>> Of failure to maintain proper work distances
A system used to arrest a worker in a fall from a working level that consists of an anchorage, connectors, a body belt or body harness, and may include a lanyard, deceleration device, lifeline, or suitable combinations of these is called a: - Ans>>> Personal Fall Arrest System (PFAS) When no other alternative fall protection has been implemented, the employer shall implement a safety monitoring system. Employers must: - Ans>>> Ensure that the safety monitor is a competent person knowledgeable about fall protection At holes, guardrail systems must be set up: - Ans>>> On all unprotected sides and edges The top edge of a guardrail must be from 39 to 45 inches above the walking/working level, and there must also be a means of protection from: - Ans>>> Falling objects between top rail and walking surface Employers must provide a training program that teaches employees who might be exposed to fall hazards: - Ans>>> How to recognize such hazards and how to minimize them
Safety nets must be strong enough to support workers who fall, and must: - Ans>>> Have small enough mesh openings that employee doesn't fall through net itself Approximately 75 percent of struck-by fatalities involve: - Ans>>> Heavy equipment such as cranes or trucks It is preferable not to drive a vehicle in reverse if you have an obstructed rear view, but if you do, make sure: - Ans>>> Vehicle has an audible reverse alarm Workers are most at risk from falling objects when standing or working: - Ans>>> -- under scaffolds -- under cranes -- wherever overhead work is being performed To prevent injury from flying debris, use safety glasses, goggles, face shields, etc., where machines or tools may cause flying particles; and always inspect tools, such as saws and lathes, to ensure that: - Ans>>> The protective guards are in good condition and firmly attached
There are a number of requirements that employers must do to protect their workers from caught-in or between hazards. Which of these is required if the worker's body, hands or clothing may come into contact with moving parts? - Ans>>> Provide guards on power tools and other equipment with moving parts The critical first step in developing a comprehensive safety and health program is to identify physical and health hazards at a work site. This process is known as: - Ans>>> A hazard assessment OSHA requires that many categories of PPE meet or be equivalent to standards developed by: - Ans>>> The American National Standards Institute (ANSI) You should have head protection if which of the following apply to your job? - Ans>>> -- Objects might fall from above -- There are low-hanging pipes or beams -- There are exposed electrical hazards In general, head protection should do which of the following? - Ans>>> -- Resist penetration by objects and absorb the shock of a blow -- Be water-resistant and slow burning
-- Have clear instructions explaining proper adjustment and replacement of the suspension and headband There might be one pair of protective eyewear for your task or station, rather than individual eyewear for each employee. If this is the approach at your job site, then: - Ans>>> You must clean and disinfect the eyewear between each use A noise level of 95 dB is ______ than the lowest level at which hearing protection is required (85 dB), and your exposure should be limited to six hours or less. - Ans>>> Ten times louder than Safety footwear has to meet minimum compression and impact performance standards, set by: - Ans>>> ASTM F-2412- Gloves that are chemically resistant are usually made from: - Ans>>> rubber or plastic True or False: Full-body protection is sometimes made from materials such as duck, paper-like fiber, or rubberized fabrics, depending upon the hazard. - Ans>>> True
What type of scaffold - other than the tube and coupler scaffold - is ideal for use around complex structures? - Ans>>> a system scaffold This scaffold is simply a rope attached to a harness with an assembly like a boatswain's chair for the worker to sit in. - Ans>>> Suspension scaffold If a worker on a scaffold can fall more than 10 feet, they must be protected by guardrails and/or personal fall arrest systems (PFAS). The type of fall protection required will depend upon: - Ans>>> The type of scaffold The four main causes of crane accidents are contact with power lines, overturns, falls and mechanical failure. Two other errors mentioned in this module that often lead to trouble are: - Ans>>> Improper maintenance and failure to conduct regular inspections No modifications or additions that affect the capacity or safe operation of a crane or derrick should ever be made without: - Ans>>> The manufacturer's written approval, which should be kept on file Truck-mounted and rough terrain cranes are both forms of a mobile crane, and both use which of the following to increase their stability? - Ans>>> outriggers
Rated load capacities, recommended operating speeds, and special hazard warnings or instructions must be: - Ans>>> Conspicuously posted on the crane, where the crane operator can see them while he is at his control station The four lifting principles that govern a crane's mobility and safety during lifting operations are: - Ans>>> Center of gravity, leverage, stability and structural integrity Employees working in the vicinity of a crane must take care to avoid what kind of accident? - Ans>>> "Struck by" Personnel hoisting platforms must be designed by: - Ans>>> A qualified engineer, or another competent specialist qualified in structural design True or False: Only personnel instructed in the requirements of the standard and the task to be performed - along with their tools, equipment and materials needed for the job - are allowed on the platform. - Ans>>> True If the hoist tower is not enclosed, the hoist platform or car must be totally enclosed on all sides for the full height between the floor and: - Ans>>> The overhead protective covering
Powder-actuated tools are extremely dangerous, with a "firing" mechanism similar to that of: - Ans>>> A loaded gun If a powder-actuated tool misfires, the employee should: - Ans>>> Wait at least 30 seconds, then try firing again All jacks - lever and ratchet jacks, screw jacks, and hydraulic jacks - must have a device that stops them from: - Ans>>> Jacking up too high (a stop indicator) OSHA defines a trench as: - Ans>>> A narrow excavation made below the surface of the ground in which the depth is greater than the width - with the width not to exceed 15 feet True or False: There is usually some form of warning before a cave-in. - Ans>>> False OSHA requires that all excavations in which employees could potentially be exposed to cave-ins be protected by one or more of the following three methods:
- Ans>>> Sloping, benching, shoring, shielding
The formula for all simple slope excavations 20 feet (6.11 meters) or less deep states that for every foot of depth, the trench must be excavated back: - Ans>>> 1 and 1/2 feet Trench boxes or shields must be designed or approved by: - Ans>>> a registered professional engineer Shoring or shielding is most often used when: - Ans>>> The location or the depth of the excavation makes sloping back to the maximum allowable slope impractical As mentioned in this module, in addition to cave-ins and related hazards, workers involved in excavation work also are exposed to hazards involving: - Ans>>> Falls, falling loads and mobile equipment Employees are prohibited from working above other employees on the face of a sloped or benched excavation unless: - Ans>>> Workers on lower level have overhead protection from falling objects To prevent surface water from entering an excavation and to provide adequate drainage of the adjacent area, OSHA standards require the use of: - Ans>>> Water removal equipment, diversion ditches, dikes, or other suitable methods
-- Ergonomic principles -- Training and education Material handling tasks should be designed to minimize _________ of the given activity. - Ans>>> -- the weight -- the range of motion -- the frequency Only employees need to demonstrate and practice safe manual lifting techniques.
- Ans>>> false Manual materials is the most common category of compensable injuries in the United States work force, with four out of five of those injuries involving: - Ans>>> the lower back When manually moving materials, employees should always try to lift it alone if a load is so bulky it cannot be properly grasped or lifted, when they cannot see around or over it, or when a load cannot be safely handled. - Ans>>> false Prior to starting all demolition operations, OSHA 1926.850 (a) requires that: - Ans>>> an engineering survey be conducted
One of the most important elements of the pre-job planning is: - Ans>>> the location of all utility services Proper equipment for prompt transportation of an injured worker, as well as a communication system to contact any necessary ambulance service, must be available: - Ans>>> on the work site Mechanical demolition refers to demolition using equipment like: - Ans>>> wrecking balls, jackhammers Prestressed concrete is: - Ans>>> A structural material with tensioned steel strands embedded inside, which compress the concrete and give it extra strength Simple pretensioned beams and slabs of spans up to about 7 meters (23 feet): - Ans>>> Can be demolished in a manner similar to ordinary reinforced concrete True or False: Electrical detonators can be inadvertently triggered by stray RF (radio frequency) signals from two-way radios - Ans>>> true A blaster is: - Ans>>> A competent person who uses explosives
