133 CHST Exam Study Guide Questions with Correct Answers

133 CHST Exam Study Guide Questions with Correct

Answers

Is a trench considered an excavation? >>>Yes

What is the distance a worker needs to maintain from power lines? >>>10ft

What does the severity of electric shock depend on? >>>Path of current, amount of

current, duration of exposure

True or false: electrical current as low as 75 milliamps can cause death? >>>True

What are some examples of surcharge loads? >>>Spoils pile and equip being too close

to walls

What is the correct extension cord for construction? >>>3 wire type designed for hard or

extra hard use

True or false: Exposed metal parts of equipment should be grounded >>>True

How does a gfci protect against electrical shock? >>>Detects the difference in current

between the black and white wires

How can overloaded circuit hazards be controlled? >>>Through the use of electrical

protective devices

What are some examples of electrical protective devices? >>>Gfcis, fuses, circuit

breakers

What is static electricity? >>>An electric charge that cannot move

How wide must the platform of a scaffold be? >>>18 inches

The platform of a scaffold must be capable of supporting its weight and __________

times the maximum load. >>>Four

The ropes or wires used in suspension scaffolds must be capable of supporting ______

times the load. >>>Six

What should be used to restrain supported scaffold platforms from tipping? >>>Guys,

ties, or braces

What is Fall Prevention? >>>The process, equipment, and methods used to actually

prevent a fall from occurring.

What is fall protection? >>>The process, equipment, and methods used to protect a

worker once a fall has occurred.

The top edge height of a guardrail should be _________ in. above the walking/working

surface. >>>42 +/- 3

What are some common hazards associated with hot work? >>>-Health hazards (air

contaminants from welding operations [iron oxide, zinc, beryllium, copper], burns, burns

to the eyes from flashes)

-Physical hazards (tripping from hoses)

-fires and explosions (igniting gases, improper storage)

What are some controls for the hazards created when performing hot work? >>>Protect

or remove fire hazards in the area, confine heat, sparks, and slag, fire extinguishing

equipment available, ventilation

What are some common electrical hazards? >>>Exposed electrical parts, overhead

power lines, inadequate wiring, defective or damaged cords and wires, improper use of

flexible cords, improper grounding, overloaded circuits

What are some controls utilized for electrical hazards? >>>Training, planning, gfci's,

fuses, circuit breakers, lockout tagout

What are some common hazards associated with excavations? >>>Weight (nearby

vehicles/equipment), vibration, underground utilities, water and soil erosion.

What is a surcharge load? >>>The spoils pile and the equipment being too close to the

vertical walls of the trench.

What are some common controls used to mitigate excavation hazards? >>>Sloping,

shoring, shields, rpe designed protective systems, soil classification.

What are some common hazards associated with working at heights? >>>slipping,

unsafe access, lack of fall protection, scaffold collapse, bad planking, unguarded edges,

What are some controls to mitigate hazards when working at heights? >>>Fall

prevention equipment, guardrails, positioning device system, warning line systems,

controlled access zone, safety monitoring system, personal fall arrest system, safety net

system

What are some common hazards associated with working in confined spaces?

>>>Hazardous atmosphere, engulfment, trapped, asphyxiated

What are some controls to mitigate the hazards associated with confined spaces?

>>>Isolation, entry supervisor, atmospheric monitoring, rescue service/equipment