Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

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

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

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

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

3: What is the temperature that a liquid and a vapor can exist in equilibrium called?

  • Wet bulb temperature
  • Saturated temperature
  • Dry bulb temperature
  • Critical temperature

4: Which has more turns in the windings: Start windings or Run windings?

  • Start windings
  • Run windings
  • They both have the exact same turns
  • Depends on the system and capacitor used

5: Pressure relief valves shall be marked with the data from

  • Section XIII Division of the ASME Boiler & Pressure Code
  • Section IV Division of the ASME Boiler & Pressure Code
  • Section I Division VIII of ASME Boiler & Pressure Code
  • Section VIII Division of the ASME Boiler & Pressure Code

6: In a horizontal shell & tube condenser, the ammonia is liquefied by

  • passing thru the tubes from top to bottom
  • water sprayed over condenser
  • removing the latent heat of fusion
  • removing the latent heat of vaporization

7: At higher altitudes, boiling temperatures

  • increase
  • depends on the refrigerant
  • decrease
  • are unaffected

8: What type of voltage cause a potential relay to open?

  • 24 volt supply from the thermostat
  • 120 volt line voltage
  • Pick-up voltage
  • none of the above

9: What are the three components of a transformer?

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

10: Which creates more of a heat load?

  • 90% RH
  • 70% RH
  • 30% RH
  • 50% RH

11: Horizontal piping should be run level.

  • No, unless the supervisor on the job says so.
  • False
  • Yes, if the condenser is located above the evaporator
  • True

12: Ammonia (NH3) is a group III refrigerant

  • True
  • False

13: The two float-type metering devices are the

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

14: A class B1 refrigerant is considered

  • toxic but non-flammable
  • toxic and somewhat flammable
  • non-toxic and non-flammable
  • non-toxic but highly flammable

15: Which refrigerant replaced R-12?

  • R-410A
  • R-134A
  • R-22
  • R-407A

16: 14.7 psia is equivalent to

  • atmospheric pressure at seal level
  • 29.92" Hg
  • 0 psig
  • All of the above.

17: "I" represents ____ in the Ohm's law formula.

  • capacitance
  • voltage.
  • amperage
  • resistance

18: It takes how many BTU's of latent heat/hr to boil 1 lbs of water into steam?

  • 24,000 BTU
  • 144 BTU
  • 12,000 BTU
  • 970 BTU

19: How many forces operate a thermostatic expansion valve?

  • 2
  • 4
  • 3
  • 1

20: Calculate the voltage in a series circuit when the total amperage is 10 amps and the resistors have values of: R1=12 ohms, R2=8 ohms, R3=4 ohms

  • 2.40 volts
  • 24.0 volts
  • 240 volts
  • 2,400 volts

21: How many BTU's is produced by one watt of energy

  • 2.57
  • 1
  • 3.41
  • 3.00

22: Absolute pressure is

  • Gauge Pressure
  • Atmospheric Pressure
  • Gauge + Atmospheric Pressure + Pi
  • none of the above

23: "R" represents ___ in the Ohm's law formula

  • amperage
  • capacitance
  • voltage
  • resistance

24: If the suction pressure is low and the evaporator temperature high, the cause will be a?

  • compressor suction valve stuck open
  • overcharged
  • starved evaporator
  • too small evaporator

25: Evaporators within 18" of a heating coil must be equipped with a

  • zone valve
  • high limit control
  • pressure relief device
  • low limit control