Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: A relief valve shall be located at least ___ above grade.

  • 10'
  • 25'
  • 36'
  • 15'

2: The heat picked up in the evaporator must equal to

  • the heat gained by the condenser
  • the heat giving by the condenser
  • the heat of compression
  • the heat lost by the medium being cooled

3: What type of fuses must be used on a HVAC system?

  • TR Type, Duel Element, Time Delay
  • Fast blow
  • 10% lower than RLA
  • none of the above

4: Oils, classified as to source, are

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

5: If two 500 ohm resistors are connected in series, the resistance will be

  • 500 ohms
  • 200 ohms
  • 20 ohms
  • 1000 ohms

6: A pressure relief should be located at least _______ from windows and doors.

  • 30'
  • 20'
  • 25'
  • 15'

7: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the

  • 24 volt secondary side of the Class 2 transformer to the thermostat
  • load-side of the contactor in
  • breaker panel in
  • first disconnect in

8: 1 HP = ____ Watts?

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

9: A hotel is considered a _______ occupancy.

  • institutional
  • mercantile
  • residential
  • commercial

10: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code

  • over pressure protection as well as a temperature protection device
  • over pressure protection
  • over pressure protection and a rupture disc
  • Pressure vessels need no type of protection as long as it is hydrostatically tested every three months

11: If a liquid receiver is designed to receive the refrigerant charge during a pumpdown procedure, it shall have the capacity to

  • hold up to 110% of the pumpdown charge
  • release the charge when the pressure exceeds 310 psig or higher
  • Pumpdown procedures are not allowed with systems containing liquid recievers
  • receive the pumpdown charge

12: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a

  • public assembly occupancy.
  • mercantile occupancy
  • commercial occupancy
  • business occupancy

13: Which is the lowest vacuum?

  • 5 psig
  • 5" hg
  • 10 psia
  • 1,000 Microns

14: An electronic bridge circuit is basically a

  • high voltage circuit
  • 24 volt control circuit
  • Wheatstone
  • suspension

15: Mercury was used in thermometers primarily because it

  • never freezes
  • vaporizes at very high temperatures
  • expands uniformly
  • was inexpensive

16: Megaohm meters can detect a ground in the

  • up to 1,000,000 ohms
  • up to 10,000 ohms
  • up to 1,000 ohms
  • 10,000,000 ohms or higher

17: When the compressor is below the condensor

  • traps are not needed on this type of system
  • traps are needed on the suction line
  • traps are needed on the oil return line
  • traps are needed on the discharge line

18: Doors communicating with outside from a mechanical room must be?

  • Self-closing, approved, fire door
  • Self-closing, wooden, fire door
  • Steel, approved, weather-stripped
  • Self-closing, aligned, fire door

19: Most CFC's are

  • inert but toxic
  • toxic
  • flammable
  • inert

20: What is the refrigerant chlorodifluoromethane?

  • R-12
  • R-123
  • R-134a
  • R-22

21: What is the purpose of a surge capacitor on a contactor?

  • to protect low voltage equipment
  • to keep the contactor pulled in
  • to balance the sine waves
  • to provide smoother start/stops

22: How many refrigerant classifications are there for flammability?

  • 3
  • 1
  • 2
  • 7

23: How many CFMs are required per square foot of commercial office occupied space

  • 20 CFM
  • 15 CFM
  • 5 CFM
  • .5 CFM

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

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

25: A check valve is a device

  • designed to allow the flow of refrigerant gas in both directions
  • that is always spring loaded
  • with a pressure drop
  • found on high pressure steam systems