Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: In a properly balanced system with valves open and properly adjusted, if the suction line is warm to the touch, its because of

  • oil in evaporator
  • not enough oil in the system
  • moisture in the system
  • low head pressure

2: What type of relief valve is used on a CO2 system?

  • glove disc
  • gate valve
  • fusible plug
  • rupture disc

3: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.

  • 7.25'
  • 8'4"
  • 7.00'
  • 9.00'

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

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

5: A High-Probablity system

  • is such that a leak of refrigerant from failed connections will enter the unoccupied space
  • is such that any leak will cause injury or death to anyone within a 100 square foot area
  • is a system highly likely to leak from a failed connection or component of such system
  • is such that a leak of refrigerant from failed connections will enter the occupied space

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

  • strong solution
  • absorbed solution
  • weak solution
  • concentrated solution

7: What is the refrigerant dichlorodifluoromethane?

  • R-22
  • R-12
  • R-123
  • R-134A

8: Two capacitors are wired in parallel. One capacitor has a value of 15uf. The other has a value of 25uf. What is the total value supplied?

  • 40 uf
  • 15 uf
  • 20 uf
  • 25 uf

9: Foaming of oil in a compressor is most likely to occur

  • when there is insufficient air across the condenser(i.e., dirty coil)
  • when the evaporator temperatures are below 32F
  • when ambient temperature are low
  • at start-up

10: A start capacitor is wired in _____ with the start windings.

  • series-parallel
  • series
  • parallel
  • junction

11: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 50
  • 22
  • 18
  • 33

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

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

13: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of

  • the high side
  • the aggregate of the high side and low side
  • the low side
  • 2.5 times the design pressure

14: The best way to detect ammonia in brine is

  • CO2 gas
  • carbonation of soda
  • potassium of line
  • nessler regaent

15: If a halide torch is used for leak detection, what color is the flame if it detects a leak?

  • green
  • orange
  • blue
  • red

16: Methyl Chloride is a halogenated refrigerant and should not come in contact with

  • aluminum
  • zinc
  • magnesium
  • all of the above

17: When must refrigeration system covered by the code be inspected?

  • Annually
  • Upon installation
  • Not required
  • Annually and when installed

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

  • 30'
  • 20'
  • 25'
  • 15'

19: What is the leaving chilled water set point for water chiller systems?

  • 38F
  • 45F
  • 55F
  • 66F

20: Heat is a form of

  • energy
  • power
  • matter
  • work

21: A normal operating evaporator temperature of R-22 for air conditioning is typically

  • 55F
  • 58F
  • 32F
  • 45F

22: On cooling towers, what causes the condenser water to drop

  • evaporation of the water droplets
  • ambient temperatures
  • sensible heat
  • tower fans

23: A Category D fluid

  • is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
  • is when the design pressure does not exceed 150 psi
  • a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
  • Both a and b are correct

24: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by

  • District Engineering Inspectors
  • Commissioned Inspectors
  • Master licensed Technician
  • both a or b

25: How are refrigerant blends classified?

  • Based on the oil used
  • Based on best case Fractionation
  • Based on worst case fractionation
  • Blends don't have to be classified