Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: The Department that certifies the transportation of refrigerant is the

  • EPO
  • RSES
  • EPA
  • DOT

2: When a refrigeration or air conditioning system is installed

  • a field inspection shall be made before it is put into service
  • it shall be approved by the owner for proper operation.
  • the form of certificate shall be authorized by the Department of Pubic safety
  • it shall not be operated below prescribed pressures

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

  • 4
  • 1
  • 2
  • 3

4: Heat cannot of itself, pass from a

  • cold to a warmer body
  • warm to a colder body
  • state of hot energy to a state of cold energy
  • None of the above

5: Humidity can be sensed with

  • pressure bellows
  • thermometer
  • bimetal
  • human hair

6: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.

  • UL and UR
  • UM or UL
  • UV or UR
  • UL and UM

7: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.

  • 20
  • 25
  • 15
  • 10

8: 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

9: One ton of refrigeration is defined as ______ btu/minute.

  • 200
  • 60
  • 720,000
  • 12,000

10: A Category D fluid

  • is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
  • is when the design pressure does not exceed 150 psi
  • a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
  • Both a and b are correct

11: The 4 basic methods of determining whether the proper amount of refrigerant is being introduced into the system are

  • sight glass, weight, pressure, and frost line
  • Buss-eye, weight, pressure, and frost line
  • sight glass, weight, pressure, and dipstick
  • sight glass, weight, paper method, and frost line.

12: The difference between saturated liquid and saturated vapor is

  • pressure
  • temperature
  • heat
  • volume

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

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

14: A declaration test is needed when the system contains more than

  • 65 lbs
  • 110 lbs
  • 120 lbs
  • 55 lbs

15: The color code of a tank of ammonia is

  • silver
  • white
  • lavender
  • light green

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

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

17: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of

  • the aggregate of the high side and low side
  • the high side
  • the low side
  • 2.5 times the design pressure

18: Ohm's Law indicates Amps X Resistance = ___________.

  • Volts
  • Current
  • Impedance
  • Ohms

19: 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

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

  • 55 lbs
  • 330 lbs
  • 500 lbs
  • 660 lbs

21: A motor is rated for 120 volts and has a RLA (rated-load amps) of 5 amps. What is the wattage of the motor?

  • 5KW
  • 600 watts
  • 1000 watts
  • 746 watts

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

  • resistance
  • voltage
  • amperage
  • capacitance

23: Ammonia (NH3) is a group III refrigerant

  • True
  • False

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

  • condenser
  • service valve
  • bleed valve
  • relief valve

25: On a ammonia compressor, the pressure of a forced fed oil pump is changed by varying the

  • cooling temperature set-point
  • opening at the pump outlet
  • adjustment of the spring tension of the TXV
  • opening at the pump inlet