Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: What is Trichlorotrifluoromethane?

  • R-12
  • R-13
  • R-113
  • R-11

2: Capacity control on a centrifugal compressor is accomplished by the

  • post-rotational guide vanes
  • pre-rotational guide vanes
  • slide vanes
  • check valves

3: What would be the classification for Stop & Shop grocery store?

  • Place of assembly
  • Large mercantile
  • Industrial
  • Instituional

4: When is the only time you can leave a service container attached to a system?

  • Leaking system
  • Recovery
  • Charging
  • Both b and c

5: The most common type of motor starter is

  • duel-winding starter
  • delts-wye starter
  • part winding starter
  • across the line starter

6: The solution that leaves the concentrator in an absorption chiller is referred to as the

  • strong solution
  • weak solution
  • diluted solution
  • absorbed solution

7: Where are the three places that the discharge from an ammonia relief valve be piped?

  • atmosphere, tank containing water, where the A.H.J. indicates
  • underground, into drain, into mechanical room
  • to chemical neutralizing tank only
  • none of the above

8: What type of voltage causes the winding in a potential relay to open?

  • BEMF (Back Electro-Motive Force)
  • 24V control voltage from the thermostat
  • 120V line voltage
  • None of the above

9: An air conditioning system rated for 36,000 BTU's is equivalent to

  • one ton of cooling
  • two tons of cooling
  • 12,000 tons of cooling
  • three tons of cooling

10: How much refrigerant can be stored in a mechanical room outside of the system?

  • 330
  • 150
  • 100
  • 200

11: 746 watts is equal to

  • 10 hp
  • 1 hp
  • 100 hp
  • Pi

12: A device used to measure small pressure differences is the

  • pyrometer
  • phsycometirc
  • anemometer
  • manometer

13: Class 3 refrigerants are

  • non-toxic
  • toxic
  • non-flammable
  • highly flammable

14: A run capacitor is wired in series with the _____ windings.

  • run
  • start
  • start capacitor
  • common

15: What does an anemometer measure?

  • temperature
  • velocity
  • voltage
  • amperage

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

  • amperage
  • resistance
  • capacitance
  • voltage

17: Low ambient controls are used when

  • when systems run all year round
  • always
  • economizers are used
  • on air conditioning systems only

18: The gauge thickness required on a CO2 tank construction is

  • 5/16"
  • 1/16"
  • 1/8"
  • 3/32"

19: Dual-pressure relief devices should be installed on

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

20: What device measures the specific gravity of a substance?

  • Thermometer
  • Hygrometer
  • Manometer
  • Hydrometer

21: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?

  • 100
  • 1,000
  • 10,000
  • 100,000

22: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)

  • illegal occupancy
  • institutional occupancy
  • public assembly occupancy
  • commercial occupancy

23: Which occupancy can ammonia be used in?

  • commercial
  • industrial
  • depends on the quantity of freon
  • redifential

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

  • 720,000
  • 60
  • 12,000
  • 200

25: The level of voltage caused by back electromagnetic force that opens the contacts of a potential relay in order to take the start capacitor out of the circuit is

  • run voltage
  • lift voltage
  • boost voltage
  • pick up voltage