Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: A Lithium-bromide system is an absorption system that

  • uses ammonia as a refrigerant and lithium bromide as an absorbent
  • uses water as a absorbent and lithium bromide as a refrigerant
  • uses water as a refrigerant and lithium bromide as an absorbent
  • uses salts as an absorbent and lithium bromide as a refrigerant

2: What is R-22?

  • HFC
  • CCFCM
  • Chlorofluoromethane
  • Chlorodifluoromethane

3: A relief valve discharge capacity is rated in

  • temperature minus pounds of air per second divided by release rate squared
  • PSIG
  • Pounds of air per minute.
  • PSIA

4: When can 50/50 solder be used?

  • in the low side
  • in the high side
  • liquid and suction lines
  • none of the above.

5: "I" represents ____ in the Ohm's law formula.

  • capacitance
  • resistance
  • voltage.
  • amperage

6: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.

  • 1.2
  • 2.2
  • 1
  • 1.5

7: What are the three components of a transformer?

  • Primary core, secondary coil, and high and low voltage connectors.
  • Contacts, secondary coil, and core
  • Primary coil, secondary coil, and core
  • Primary coil, secondary coil, and copper contacts

8: The high side float assembly meters refrigerant into the evaporator through the

  • lower chamber of the high side
  • upper chamber of the high side
  • upper chamber of the low side
  • lower chamber of the low side

9: 1 HP = ____ Watts?

  • 11,239
  • 3,412
  • 3.1416
  • 746

10: When should a relief valve start to function?

  • 10 psi before it's set pressure
  • At it's set pressure
  • Two times it's working pressure
  • Before the purge station discharges

11: A room having machinery but no flame producing apparatus permanently installed and operated is considered a

  • Class A machinery room
  • Class B machinery room
  • Class M machinery room
  • Class T machinery room

12: 746 watts is equal to

  • 10 hp
  • 1 hp
  • 100 hp
  • Pi

13: A secondary coolant is defined as

  • any refrigerant direcly in contact with the cooling space for process cooling
  • any liquid used for the transmission of heat without a change of state in A/C refrigeration systems having flash point above 150F
  • a low temperature refrigerant used for cascading systems
  • a combination of interconnected parts from a closed circuit in where fluid is circulated for the purpose of cooling for a refrigeration system.

14: How many different groups of refrigerants are there?

  • 15
  • 11
  • 3
  • 7

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

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

16: Dual-pressure relief devices should be installed on

  • vessels of 10 cubic feet or less
  • vessels of 10 cubic feet or more
  • vessels of 3 cubic feet or more
  • vessels of 3 cubic feet or less

17: What is the amp draw of a 40 VA transformer at 24 volts

  • 1K amps
  • 1,000 amps
  • 106 amps
  • 1.6 amps

18: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 66
  • 50
  • 22
  • 25

19: A R-410A system running with a condensing temperature of 110F and 50F evaporator temperature will read pressures of ___ on the high side and ___ on the low side

  • 257 psig, 77 psig
  • 365 psig, 120 psig
  • 226 psig, 68 psig
  • 455 psig, 185 psig.

20: When can recovered refrigerants be reused?

  • They can't
  • Only when used in original owner's equipment
  • Only if used in 30 days of recovery
  • None of the above

21: What is the maximum voltage range allowed on an electrical circuit?

  • 5%
  • 15%
  • 10%
  • 20%

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

  • bleed valve
  • service valve
  • condenser
  • relief valve

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

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

24: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.

  • 100
  • 550
  • 350
  • 50

25: What is the typical air conditioning operating pressures for 410A?

  • 60 psi suction, 210 psi discharge
  • 25 psi suction, 125 psi discharge
  • 105 psi suction, 350 psi discharge
  • None of the above