Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: 1 HP = ____ Watts?

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

2: Gauge pressure is

  • atmospheric pressure
  • absolute pressure
  • force of pressure above that of atmospheric
  • what a gauge reads when checking pressures on a chilled water system.

3: The freezing point of water at sea level is?

  • -10C
  • 32F
  • 32C
  • 0F

4: What was the main reason for enacting the no venting rule of July 1, 1992?

  • Ozone depletion
  • Green house effect
  • Global warming potential
  • All of the above

5: One atmosphere equals

  • 0 psia
  • 14.7
  • 0 psig
  • 29.4

6: Which of the following is not an air velocity meter?

  • Hydrometer
  • Anemometer
  • Velometer
  • Anemotherm

7: Oils, classified as to source, are

  • animal, vegetable, and castor
  • naphthalene, paraffin, and castor
  • animal, vegetable, and mineral
  • naphthalene, mixed, and paraffin

8: On a TXV, the purpose of an external equalizer is to?

  • balance the evaporator load
  • Increase the pressure on the top of the power head diaphragm
  • allow a greater adjustment spam
  • compensate for a pressure drop across the evaporator coil

9: What would be the classification of a church?

  • Industrial
  • Large mercantile
  • Place of assembly
  • Institutional

10: Which of the following most closely represents the concentration of Li-Br in a absorption system?

  • 40% Li-Br, 60% distilled water
  • 50% Li-Br, 50% tap water
  • 40% Li-Br, 60% tap water
  • 60% Li-Br, 40% distilled water

11: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by

  • District Engineering Inspectors
  • Commissioned Inspectors
  • Master licensed Technician
  • both a or b

12: A 3-cubic foot receiver must have what type of relief valve?

  • fusible plug
  • relief valve
  • rupture device
  • none of the above

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

  • reactance
  • amperage
  • watts
  • voltage

14: If the suction pressure is low and the evaporator temperature high, the cause will be a?

  • starved evaporator
  • overcharged
  • compressor suction valve stuck open
  • too small evaporator

15: What refrigerant is an inorganic compound?

  • R-22
  • Ammonia
  • R-132A
  • R-410A

16: Starting relays for a single phase compressors are used to remove the starting circuit from operation when the motor reaches approximately ____ percent of its speed.

  • 100
  • 75
  • 24
  • 50

17: The proper location for an oil separator is between the

  • compressor and condenser
  • condenser and receiver
  • evaporator and compressor
  • receiver and metering device

18: Which refrigerant class listed below is the most flammable?

  • B2
  • A3
  • A2
  • C3

19: Absolute pressure is

  • Gauge Pressure
  • Atmospheric Pressure
  • Gauge + Atmospheric Pressure + Pi
  • none of the above

20: Heat is a form of

  • power
  • work
  • matter
  • energy

21: 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

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

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

23: The color code of a tank of ammonia is

  • lavender
  • white
  • light green
  • silver

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

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

25: 746 watts is equal to

  • 10 hp
  • 1 hp
  • 100 hp
  • Pi