Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: What does an anemometer measure?

  • voltage
  • temperature
  • amperage
  • velocity

2: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.

  • 24
  • 18
  • 10
  • 15

3: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.

  • 2.5
  • 5.5
  • 3.0
  • 2.0

4: What type of pressure relief device is used on a CO2 system?

  • Rupture disk
  • Gate valve
  • Fusible plug
  • Glove valve

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

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

6: What section of ASHRAE-15 governs pressure vessels?

  • Section 7 ASHRAE-15 ASME VIII fired
  • Section 6 ASHRAE-34 ASME VIII unfired
  • Section 9 ASHRAE-15 ASME VIII unfired
  • OSHA

7: What is the boiling point of refrigerant governed by?

  • Evaporator temperature
  • P&T relationship
  • Compressor RPM's
  • Condenser sub-cooling

8: What is not a requirement of a class T machine room?

  • fire hose connection to the building fire protection system
  • tight fitting doors
  • self-closing doors
  • automatic ventilation

9: On a centrifugal compressor, stationary diffuser vanes are needed to

  • stop gas flow
  • convert velocity energy to pressure
  • prevent high pressure on the packing
  • increase the clearance space

10: Secondary refrigerants are usually

  • water or brine
  • Prestone anti-freeze
  • alcohol
  • expensive

11: What are the three components of a transformer?

  • Contacts, secondary coil, and core
  • Primary coil, secondary coil, and core
  • Primary coil, secondary coil, and copper contacts
  • Primary core, secondary coil, and high and low voltage connectors.

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

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

13: What is a Category "M" fluid?

  • A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and the designed temperature is between -20F to 366F
  • A typical refrigerant used on newer air conditioning and heat pump systems
  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
  • Any fluid that exceeds 150 psig and has design temperatures over 366F

14: one BTU equals

  • 12,000 hp
  • 31.4 hp
  • 3.41 hp
  • Pi

15: The two float-type metering devices are the

  • liquid float and the low-side float
  • vapor float and the low-side float.
  • high-side float and the low-side float
  • liquid float and the vapor float

16: What's the purpose of a megohmmeter?

  • To measure low to very low resistance values
  • To alternate the current in a DC circuit in order to calculate the total impedance of a circuit
  • To measure very high resistances
  • None of the above

17: A hotel is considered a _______ occupancy.

  • residential
  • mercantile
  • commercial
  • institutional

18: On a single phase motor, when does the start winding cut out?

  • At 50% of its full rated speed
  • Start windings do no cut-out of the run cycle
  • At 25% of its full rated speed
  • At 75% of its full rated speed

19: Which oil is hydoscopic?

  • polyolester
  • SW30
  • animal
  • mineral

20: Heat is a form of

  • power
  • work
  • energy
  • matter

21: 1 HP = ____ Watts?

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

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

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

23: A solder joint melts at temperatures of

  • less than 400F
  • 600F to 900F
  • 400F to 800F
  • 1,200F to 1,500F

24: Copper and its alloys shall not be used with ammonia

  • True
  • False

25: Volts x amps equals

  • Inductance
  • Watts
  • Impedance
  • Ohms Law