Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: Start to Run windings will have what resistance?

  • Somewhere between the actual start winding and run winding resistance value
  • All will be at equal values
  • The least resistance value
  • The most resistance value

2: Instead of using a compressor, an absorption air-conditioning chiller uses which of the following as its driving force?

  • Air
  • Heat
  • Electricity
  • Oil

3: Name three things that must be done when changing refrigeration lubricant?

  • Nothing must be done
  • You can't change lubricants.
  • Place sign, check for leaks, insulate
  • Make sure it's compatible, notify owner, notify AHJ

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

  • Fire hose connected to the building fire protection system.
  • Self-closing doors
  • Tight fitting doors
  • Automatic ventilation

5: Refrigeration piping before being buried shall be

  • leak tested
  • encased in pipe duct
  • pressure tested
  • All of the above

6: "P" represents ______ in the Watt's law formula

  • amperage
  • reactance
  • watts
  • voltage

7: How would you know if there was a loss of crankcase pressure?

  • oil will thicken
  • oil will thin out
  • oil will foam
  • oil level will rise

8: If air is present in an absorption chilled water appliance, which of the following will most likely occur?

  • Rust can form
  • The Li-Br solution will become more diluted
  • The Li-Br solution will become more concentrated
  • System operating pressure will drop

9: The absorber shell contains the

  • condenser and the generator
  • condenser and the absorber
  • condenser, the evaporator, and the generator
  • evaporator and the absorber

10: Booster compressors connect to the ____ side of the compressor

  • vapor
  • liquid
  • oil side
  • low side

11: The location of the thermal bulb for the TXV on the evaporator effects

  • both the pressure and temperature in the feeler bulb
  • the amount of superheat required to operate the TXV
  • the amount of liquid in the evaporator
  • the amount of gas in the evaporator

12: Industrial occupancy is

  • a premise or that portion of a premise that is not open to the public, where access by authorized persons is controlled, and that is used to manufacture, process, or store goods, such as chemicals, food, ice, meat, or petroleum.
  • is a premise or that portion of a premise where large number of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • Both a and b are correct

13: The principle used in continuous type absorption systems is

  • Boyle's Law
  • Charles's Law
  • Dalton's Law
  • Ohm's Law

14: The best way to detect ammonia in brine is

  • nessler regaent
  • carbonation of soda
  • potassium of line
  • CO2 gas

15: Who authorizes changes to the safety codes?

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

16: Low pressure systems have what kind of compressor?

  • Scroll
  • Centrifugal
  • Rotary
  • Reciprocating

17: B3 refrigerants are considered

  • non-toxic but non-flammable
  • toxic but non-flammable
  • toxic and highly flammable
  • non-toxic but flammable

18: "E" references ____ in the Ohm's law formula

  • amperage
  • resistance
  • voltage
  • capacitance

19: The External equalizer of a TXV compensates for

  • pressure drop across the evaporator coil
  • pressure drop across the condenser coil
  • pressure within the system
  • pressure within the evaporator

20: Where would the EPR valve be located on a multiple evaporator system?

  • outlet of high temperature evaporator
  • outlet of low temperature evaporator
  • inlet of the low temperature evaporator.
  • outlet of the liquid line

21: What is an egress?

  • An entrance or exit
  • A valve put on the low side of the system to prevent frosting
  • A code violation
  • An escape route

22: When a refrigerating machinery room is used, the emergency procedures shall be posted

  • outside the room, immediately adjacent to each door
  • inside the room, immediately adjacent to each door
  • on a conspicuous card located near the compressor
  • on a conspicuous card located near the evaporator

23: Suction line oil traps should be installed when the condenser is

  • on the third floor roof and the evaporator is in the basement
  • more than 100' away from the evaporator
  • in the basement and the evaporator is on the third floor
  • located outside the operates in temperatures below 35F

24: 746 watts is equal to

  • 10 hp
  • 100 hp
  • 1 hp
  • Pi

25: A crankcase heater has a supplied voltage of 100 volts and is drawing 1.4 amps. What is the resistance?

  • 104 ohms
  • 27 ohms
  • 71 ohms
  • 80 ohms