Unit 4 Review Test/ General Safety
Practice Exam Questions and Answers
An example of a pressure vessel is - Answer-A cylinder containing refrigernat for a
refrigeration system
If you were a technician about to service an air conditioning system using R-22
refrigerant and the temperature of the refrigerant in the cylinder in your truck was 105*F
what would be the pressure of the refrigerant psig in the cylinder - Answer-210.8
A fusible plug is made from - Answer-A material with a low melting temperature
When transferring refrigerant from a cylinder to a refrigeration system, you should
always wear - Answer-Gloves and goggles
Oil must never be used around a oxygen - Answer-Oxygen
Before using your voltmeter always - Answer-Set the range selector to a setting higher
than the voltage you will be reading
Properly grounded power tools should be used - Answer-So that if the motor or other
electrical part of the tool becomes shorted to the frame, the electric current will follow
the grounding circuit.
A double insulated electric drill - Answer-Generally has a plastic case with the electrical
connections and motor insulated within the tool.
When soldering a replacement fitting in a refrigeration circuit it is important that -
Answer-Related valves or Schrader ports are open
Nitrogen must be used with a regulator - Answer-To reduce very high pressure in the
cylinder to a safer pressure.
What two types of injury are caused by electrical energy - Answer-Shock and Burns
Which of the following statements is correct when referring to large refrigerant or
nitrogen tanks? - Answer-a. The protective cap must be on when the tank is not in use.
b. Safety goggles or glasses must be worn when moving the tank.
c. Large tanks should not be carried, they should be secured to an approved cart.
d. All of the above are correct.
Practice Exam Questions and Answers
An example of a pressure vessel is - Answer-A cylinder containing refrigernat for a
refrigeration system
If you were a technician about to service an air conditioning system using R-22
refrigerant and the temperature of the refrigerant in the cylinder in your truck was 105*F
what would be the pressure of the refrigerant psig in the cylinder - Answer-210.8
A fusible plug is made from - Answer-A material with a low melting temperature
When transferring refrigerant from a cylinder to a refrigeration system, you should
always wear - Answer-Gloves and goggles
Oil must never be used around a oxygen - Answer-Oxygen
Before using your voltmeter always - Answer-Set the range selector to a setting higher
than the voltage you will be reading
Properly grounded power tools should be used - Answer-So that if the motor or other
electrical part of the tool becomes shorted to the frame, the electric current will follow
the grounding circuit.
A double insulated electric drill - Answer-Generally has a plastic case with the electrical
connections and motor insulated within the tool.
When soldering a replacement fitting in a refrigeration circuit it is important that -
Answer-Related valves or Schrader ports are open
Nitrogen must be used with a regulator - Answer-To reduce very high pressure in the
cylinder to a safer pressure.
What two types of injury are caused by electrical energy - Answer-Shock and Burns
Which of the following statements is correct when referring to large refrigerant or
nitrogen tanks? - Answer-a. The protective cap must be on when the tank is not in use.
b. Safety goggles or glasses must be worn when moving the tank.
c. Large tanks should not be carried, they should be secured to an approved cart.
d. All of the above are correct.
