Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: What is Trichlorotrifluoromethane?

  • R-11
  • R-13
  • R-113
  • R-12

2: Three-phase motors have what type of windings?

  • three run windings
  • three start windings
  • one start winding and one run winding.
  • three run windings and 3 start windings

3: Capacitors are rated in

  • volt - amperes
  • kelvins
  • micro-farads
  • megaohms

4: What happens after your initial inspection of a pressure vessel?

  • Notify the Fire Marshal that the system has been inspected and approved
  • Notify the AHJ to let them know that the system been inspected
  • Inspector leaves a metal tag with a certification listed on it
  • There is a temporary shut-down until a final inspection can be performed.

5: A mercury bulb controller is not recommended for

  • use where vibration is severe
  • low voltage use
  • line or low voltage use
  • line voltage use

6: Pressure vessels with an internal volume of 10 cubic feet or more

  • shall use fusible plugs
  • shall use pressure relief devices or fusible plugs
  • shall use rupture discs or duel pressure relief valves
  • shall use pressure relief devices

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

  • True
  • False

8: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.

  • shall be prohibited
  • of Group B2 refrigerant shall be prohibited
  • containing R-11, R-123 & R-717 exclusively shall not be prohibited
  • shall not be prohibited

9: Volts x amps equals

  • Inductance
  • Impedance
  • Ohms Law
  • Watts

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

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

11: A single pole-double throw switch used how many wires excluding the ground wire?

  • two
  • five
  • three
  • four

12: Who authorizes changes to the safety codes?

  • Person in charge of the facility
  • Contractor who last serviced the system.
  • Person who pulled the permit
  • Board of Boilers

13: Ammonia is under what safety classification?

  • B2
  • B3
  • B1
  • A3

14: What kind of system uses two different refrigerants in separate systems dependent on each other?

  • Low pressure
  • Simple
  • Cascade
  • R-414B

15: Thermodynamics is the branch of science that deals with

  • state of energy
  • molecular therory
  • heat energy
  • energy due to motion

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

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

17: All machine rooms must be outfitted with a detector that _______?

  • activates an audible alarm
  • activates a visual alarm
  • starts the ventilation system
  • All of the above

18: Name a CFC refrigerant(s):

  • R-11
  • R-12
  • R-123
  • both a & b

19: What is the minimum height refrigeration piping should be placed against walls?

  • 7.25'
  • Ceiling height
  • 72"
  • 6'

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

  • Velometer
  • Hydrometer
  • Anemometer
  • Anemotherm

21: A direct system

  • is where the refrigerant comes in contact with the space refrigerated
  • is on where brine is cooled & circulated to the space refrigerated
  • is a self-contained complete factory made and tested system
  • is one which encloses a separate body of evaporative refrigerant

22: When an electronic bridge is in balance the bridge output will be

  • 15 volts
  • 1 volt
  • .01 volts
  • 0 volts

23: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant

  • does not require a pressure-limiting device
  • shall be inspected by the Boiler of Inspectors bi-annually
  • shall have a pressure limiting device and a pressure relief valve installed
  • shall have a pressure limiting device installed on the high side of the system

24: 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)

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

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

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