Question

1. in the absence of other information, all soil in an excavation should be treated as if it is

a. type a
b. type b
c. type c
d. solid rock

1. daily inspection of an excavation must be performed by a(an)

a. qualified person
b. competent person
c. foreman
d. engineer

1. one of the most common grounding systems used for protection against accidental electrical shock is

a. two - wire system
b. three - wire system
c. four - wire system
d. five - wire system

1. a polarized electrical receptacle is used for

a. all power tools
b. three - wire power cords
c. double - insulated tools
d. plugs with the ground pin cut off

1. a system that protects workers from the release of hazardous energy while they work with machines or equipment is referred to as

a. a disconnect
b. a barricade system
c. lockout/tagout
d. an energy - neutral system

1. in a lockout/tagout situation, a personal lock and tag must be removed by

a. a supervisor
b. a competent person
c. a qualified person
d. the person who applied them

1. hard hats should be made of fiberglass or

a. metal
b. reinforced plastic
c. styrofoam
d. rubber

Explanation:

1. In the absence of other information, soil in an excavation is considered Type C as it has the lowest stability.
2. Daily inspection of an excavation must be done by a competent person who has the knowledge and ability to identify hazards.
3. A three - wire system is a common grounding system for protection against accidental electrical shock as it includes a ground wire.
4. A polarized electrical receptacle is used for double - insulated tools to ensure proper connection and safety.
5. Lockout/tagout is a system that protects workers from the release of hazardous energy while working with machines.
6. In a lockout/tagout situation, a personal lock and tag must be removed by the person who applied them to ensure accountability.
7. Hard hats should be made of fiberglass or reinforced plastic for adequate impact resistance.

Answer:

1. c. Type C
2. b. competent person
3. b. three - wire system
4. c. double - insulated tools
5. c. lockout/tagout
6. d. the person who applied them
7. b. reinforced plastic