hvac safety

Which of the following statements is correct when referring to large refrigerant or nitrogen tanks?

• The protective cap must be on when the tank is not in use.

• Safety goggles or glasses must be worn when moving the tank.

• Large tanks should not be carried, they should be secured to an approved cart.

• All of the above are correct.

When it is necessary to perform electrical work in an area that has a damp or wet floor, which of the following can be done to minimize the chance of electrical shock?

• Place a rubber mat on the floor.

• Place a rubber mat on the floor.

• Wear insulated boots and gloves.

• All of the above

When using a torch to braze a fitting, the technician should use the proper size ____, wear ____, and always have a ____ nearby.

• copper pipe, insulated boots, fire extinguisher

• torch tip, insulated boots, protective fire shield

• torch tip, safety glasses, fire extinguisher

• acetylene tank, safety glasses, bucket of water

An example of a pressure vessel is ____.

• a small ship containing refrigerant cylinders

• the compressor in a refrigeration unit

• a cylinder containing refrigerant

• a portable dolly

A fusible plug is a metal fitting that has a hole drilled through it and the hole is filled with

• material with a low melting point

• plastic

• copper fused with brass

• a metal alloy that will burn when overheated

When transferring refrigerants from a cylinder to a refrigeration system or any other container, you should always wear ____.

• goggles with side shields and gloves

• heavy protective clothing

• rubber gloves

• industrial steel-toed shoes and an insulated cap

Before using a voltmeter, always ____.

• Zero the ohms adjustment.

• Touch the two leads together to insure continuity.

• Set the range selector to a setting higher than the voltage you expect to read.

• Turn off the power.

A double insulated drill ____.

• has two ground wires to insure proper grounding

• generally has a plastic case with the electrical connections and motor insulated within the tool

• is used with a three- to two-prong adapter

• has rechargeable batteries

In electrical circuits, the grounding wire is typically ____.

• black

• red

• green or bare

• white