Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: In a properly balanced system with valves open and properly adjusted, if the suction line is warm to the touch, its because of

  • not enough oil in the system
  • low head pressure
  • oil in evaporator
  • moisture in the system

2: The amount of heat required to raise the temperature of 1 lb of water 1F is?

  • 1 Kelvin
  • 1 BTU
  • The rate of conduction
  • 1 Therm

3: Pressure relief valves shall be marked with the data from

  • Section VIII Division of the ASME Boiler & Pressure Code
  • Section XIII Division of the ASME Boiler & Pressure Code
  • Section IV Division of the ASME Boiler & Pressure Code
  • Section I Division VIII of ASME Boiler & Pressure Code

4: A multi-evaporator refrigeration system uses what type of valve to maintain evaporating temperatures?

  • EEV
  • EPR valve
  • Solenoid valve
  • CPR valve

5: Volts x amps equals

  • Inductance
  • Impedance
  • Ohms Law
  • Watts

6: Electricity involves the movement of electrons in atoms

  • True
  • False

7: A professional or office building would be considered what type of occupancy?

  • mercantile
  • business
  • commercial
  • public assembly

8: How many opening forces operate a thermostatic expansion valve?

  • 4
  • 3
  • 2
  • 1

9: Pressure vessels of 10 cubic feet or more gross volume shall use

  • at least one rupture member
  • a dual pressure-relief valve if charging into the atmosphere
  • at least three means of discharge and/or rupture discs
  • both a and b are correct

10: R-410A can segregate in the system or chemically change its composition due to a leak.

  • True
  • False

11: Machinery rooms must be vented to ______?

  • outdoors
  • neutralizing tank
  • basement
  • unoccupied spaces

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

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

13: How many volts would you read on a 480V system phase to phase?

  • 0
  • 480
  • 1/3 the voltage
  • 277

14: What is the typical air conditioning operating pressures for R-22?

  • 60 psi suction 210 psi discharge
  • 25 psi suction 125 psi discharge
  • 105 psi suction 340 psi discharge
  • None of the above

15: The purpose of a receiver is

  • a vessel to store refrigerant outside the system
  • to increase the capacity that the system can hold
  • to use a a later date
  • all of the above

16: "R" represents ___ in the Ohm's law formula

  • voltage
  • resistance
  • capacitance
  • amperage

17: How are refrigerant blends classified?

  • Based on best case Fractionation
  • Blends don't have to be classified
  • Based on worst case fractionation
  • Based on the oil used

18: The rupture disc on a low-pressure chiller typically releases pressure at

  • 15 psig
  • 0 psig
  • 10 psig
  • 5 psig

19: What does an anemometer measure?

  • temperature
  • voltage
  • amperage
  • velocity

20: How many forces operate a thermostatic expansion valve?

  • 1
  • 4
  • 3
  • 2

21: Which of the following is NOT a positive displacement compressor?

  • reciprocating
  • scroll
  • centrifugal
  • screw

22: The instrument used to measure the specific gravity of absorption chiller solutions is the

  • Psychrometer
  • hydrometer
  • anemometer
  • refractometer

23: A tachometer is an instrument used to measure

  • RPM
  • static pressure
  • speed
  • air velocity

24: What is the minimum size wire you can use on a 30 amp circuit?

  • 14 AWG
  • 16 AWG
  • 12 AWG
  • 10 AWG

25: 1 HP = ____ Watts?

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