Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: Halogenated refrigerants cannot be used with what material?

  • Stainless steel
  • Copper
  • Magnesium alloy
  • Aluminum

2: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.

  • the atmosphere
  • a de-pressurized recovery tank with a silver top and yellow bottom
  • a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
  • All of the above

3: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)

  • Pressure gauge
  • Temperature gauge
  • Sight glass gauge
  • All of the above

4: What is not a requirement of a class T machine room?

  • self-closing doors
  • fire hose connection to the building fire protection system
  • tight fitting doors
  • automatic ventilation

5: What do you need to do when you install a new system?

  • Document the superheat and subcooling reading
  • Insulate the suction line before you take a superheat reading
  • Have it inspected
  • Add refrigerant

6: What happens after your initial inspection of a pressure vessel?

  • There is a temporary shut-down until a final inspection can be performed.
  • Notify the Fire Marshal that the system has been inspected and approved
  • Notify the AHJ to let them know that the system been inspected
  • Inspector leaves a metal tag with a certification listed on it

7: The most common type of motor starter is

  • delts-wye starter
  • duel-winding starter
  • part winding starter
  • across the line starter

8: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.

  • high pressure
  • critical pressure
  • low pressure
  • design pressure

9: The boiling point of a refrigerant is based on

  • Temperature
  • Heat content
  • a pressure-temperature relationship
  • None of the above.

10: Pressure is the equivalent of

  • force times area
  • force per unit area
  • force
  • area times force

11: How many different groups of refrigerants are there?

  • 7
  • 3
  • 15
  • 11

12: What is NOT a positive displacement compressor.

  • Scroll
  • Rotary
  • Reciprocating
  • Centrifugal

13: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed

  • 55 lbs
  • 550 lbs
  • 330 lbs.
  • 660 lbs

14: What must be done if refrigeration lines pass through a concrete floor?

  • installed through a pipe casing
  • insulated
  • moisture barrier
  • leak checked

15: Who authorizes changes to the safety codes?

  • Contractor who last serviced the system.
  • Person in charge of the facility
  • Board of Boilers
  • Person who pulled the permit

16: Single compound Refrigerants are classified by what two criteria?

  • Flammability and temperature range
  • Temperature range and hazardousness
  • Weight and color
  • Flammability and toxicity

17: How many flammability classifications are refrigerants in?

  • 5
  • 3
  • 2
  • 7

18: Calculate the voltage in a series circuit when the total amperage is 10 amps and the resistors have values of: R1=12 ohms, R2=8 ohms, R3=4 ohms

  • 2,400 volts
  • 24.0 volts
  • 240 volts
  • 2.40 volts

19: Which has more turns in the windings: Start windings or Run windings?

  • Start windings
  • Run windings
  • They both have the exact same turns
  • Depends on the system and capacitor used

20: Where are the three places that the discharge from an ammonia relief valve be piped?

  • atmosphere, tank containing water, where the A.H.J. indicates
  • underground, into drain, into mechanical room
  • to chemical neutralizing tank only
  • none of the above

21: The main cause of enacting the "no vending rule" of July 1st 1992 was

  • global warming potential
  • ozone depletion
  • both a & b
  • None of the above

22: In a refrigeration system, you open a valve from the condenser and collect some material on a clean white sheet of bond paper, which of the following would you most likely be testing for?

  • checking the level of refrigerant in the system
  • testing for oil in the system
  • testing for moisture in the system
  • none of the above

23: Which of the following is a drop-in for R-22

  • R-410A
  • R-134A
  • R407C
  • None of the above

24: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.

  • True
  • False

25: Stop valves shall not be permitted between the system and the

  • relief valve
  • bleed valve
  • service valve
  • condenser