2020 Exam A

A refrigerant container should never be heated or stored in temperatures above:

125°F.

Always use a pressure regulator when working with ____.

All of the above.

Before operating a power tool, ____.

All of the above.

Federal law mandates that:

All used refrigerants must be sold to an EPA certified reclamation site

How should accidents be reported to the company office?

An accident report form should be filled out and turned into the company office.

Based on ASHRAE Standard 34, which refrigerant classification would indicate least toxicity?

Class A1

A hard hat can be worn with the bill facing forward or backward.

False

A ladder can be placed on a scaffold as long as the scaffold wheels are locked.

False

A stationary refrigerant detector indicates when refrigerant is moving too slowly in a system.

False

In an emergency situation, any type of fire extinguisher can be used on any type of fire.

False

Keys used for electrical lockout must be kept near the lockout device so any worker can unlock the device in an emergency.

False

Tagout is the practice of securing an electrical switch in an open position so a circuit cannot be energized while work is being performed.

False

One fire extinguisher in a work area is sufficient:

If its capacity is large enough to handle a fire that could occur.

How would one know if a refillable refrigerant cylinder is safe to use?

It will have an inspection date stamped at the top

How can maintaining an orderly shop be beneficial?

Less time is wasted searching for required tools or materials.

How often should live circuits be worked on?

Only when absolutely necessary

How can you easily maintain MSDS documents?

Put MSDSs in a manila envelope within the service vehicle.

How is size of an extinguisher related to its ability to put out a fire?

The more combustible materials, the bigger the extinguisher

Asbestos insulation, which may be found in old installations, contains fibers that can cause cancer if inhaled.

True

Facial hair can make a dust mask or respirator ineffective due to poor sealing.

True

OSHA is the national law that covers workplace safety.

True

Respirators require periodic flow testing.

True

Safety glasses or other eye protection should be worn when performing any work.

True

When a fusible plug in a cylinder melts, all of the refrigerant is released from the cylinder.

True

Working in hot temperatures can cause your body to overheat.

True

Acetylene tanks should always be stored and transported:

Upright and safely secured in a vertical position.

How should a refrigerant cylinder be warmed up during service?

With warm water not over 125°F

Electrical shock occurs when ____.

a body becomes part of an electrical circuit

Acetylene should never be used

above 15 psi

In case of an accident, the first step is

call 911

Before loading a torch set onto the back of your service truck, you should

close the cylinder valves and remove the regulators

The Globally Harmonized System (GHS) includes the following standard label elements except ____.

foreign language translations

Store and transport refrigerant cylinders ____.

in a vertical position with the valve up

The primary hazard in a confined space is ____.

limited airflow

When positioning an extension ladder, the base can be no farther from the wall than ____ the supported height.

one quarter

When using a torch near combustible materials, always ____.

place a heat shield between the torch flame and the materials

When referring to the correct usage of a fire extinguisher, the letters P.A.S.S. stand for ____.

pull, aim, squeeze, and sweep

How can you determine what PPE should be used with any particular chemical product?

read the MSDS form for that product

OSHA's Hazard Communication Standard (HCS) requires manufacturers and distributors to provide ____ for the chemicals they supply.

safety data sheets (SDS)

Heat-related illness may produce the following signs except ____.

shivering

A simple tool that technicians can use to check for energized circuits is

the non-contact voltage detector

How can a confined space, such as a walk-in cooler or underground tunnel become a safety hazard?

the oxygen is limited - long exposure can cause suffocation

How can a non-toxic, non-flammable refrigerant still be dangerous when released in a confined space?

the refrigerant can replace the air, causing suffocation

Pressure vessels can be hazardous because

they can rupture violently like a bomb

Before changing the blade in an electric circular saw, you should

unplug the saw

Pressure vessels such as boilers should have a placard on or near the vessel that displays

when it was inspected and when the next inspection should be