1-1-9 Hazard awareness

In 2014, what ratio of construction worker injuries resulted in death?

1 out of 5

A breaker required to be used in wet locations automatically shuts off the electric power with as little as _____?

5 mA

A victim of a severe shock may suffer internal hemorrhages and destruction of tissues, nerves and muscles that are not _____?

Readily visible

Slight shock felt; not painful but disturbing. Average individual can let go. These reactions best describe a current flow of _____?

5 mA

Electrical shocks can cause involuntary muscle reactions. These reactions can result in a wide range of injuries from collisions or _____?

Falls

Using listed and labeled portable tools protected by a system of single insulation is a form of incorporated protection designed to protect personnel against electrical shock

False

Breakers used in wet location, construction sites and other high risk areas as a means of circuit protection must be of the ____ type

GFCI

Most electrical accidents result from unsafe equipment, unsafe environment, and unsafe working practices. True or false

True

Extreme pain, respiratory arrest, severe muscular contractions. Death is possible. These reactions best describe a current flow of ____ to 150 mA

50

During an electrical shock, the _____ often causes the muscles to contract.

A electrical stimulation

An electrical accident can result in _____, such as electrical, arc or thermal

Burns

A properly installed grounding conductor has a low resistance to ground and greatly reduces the amount of _____?

Current passing through the body

When a "system operator" is in charge of a circuit, and a crew needs the circuit deenergized, the person responsible for the clearance is the?

Designated employee who requested the clearance

When a cord connector on a portable power tool is wet, hazardous _______ can occur on the equipment grounding conductor and can be dangerous if someone picks the tool up

Electrical leakage

According to osha, the ______ is responsible for meeting the requirements of providing GFCI's for all 120 volt, single phase 15- and 20- amp receptacle outlets on sites used for temporary use

Employer

Conductors and parts of electric equipment not deenergized using procedures defined in osha 1910.269 "hazardous energy control" must be treated as

Energized

Electricity, as a hazard, exposes workers to electric shock, electrocution and _____?

Explosions

Components designed to protect conductors and equipment from overheating by opening the circuit when there is a risk of a ground fault are ____?

Fuses and circuit breakers

If a pole contacts a live circuit while being installed and also contacts the ground, a voltage _____ may be set up at the base of the pole

Gradient

A(n) ______ fault is a short circuit caused when an object in contact with the earth contacts a live conductor

Ground

Devices designed to interrupt the flow of electricity within 1/40th of a second are called?

Ground fault circuit interrupters

Four factors that determine the severity of an electric shock through the body are current amount, path, frequency and ____?

Length of time it flows

Grounding a vehicle to the ____ promotes a fast trip out of the circuit should the vehicle become energized and also promotes the collapse of the voltage in the system

Neutral

Grounding jumpers used on a transmission or distribution circuit must be _____?

Of a size capable of conducting the maximum fault current for the time necessary to clear the fault

When grounding a boom truck before using it near an energized circuit, the best ground source to attach ground jumpers to is a(n)____?

Permanent ground network such as a neutral or steel tower leg

Dry skin has a fairly high _____ to electric current. But when the skin is moist or wet, it acts as a conductor

Resistance

The only real protection available to people working around a vehicle when a boom makes contact with a live conductor is to stay on the vehicle or _____ the vehicle

Stay away from

A frequent hazard on a construction site involves a cord assembly with improperly connected?

Terminals

A common and sometimes overlooked conductor is the surface or subsurface of...

The earth

One form of worker protection from step touch potential is to ground all of the vehicles ____?

Together

All employees who work with electrical power generation, transmission and distribution must properly be trained in the safety related work practices involved. True or false

True

Grounding is normally a secondary protective measure to protect against electrical shock. Grounding does not guarantee you will not get a shock from electrical. True or false

True

If you work in an area where there are potential electrical hazards, your employer must provide you with protective equipment

True