Refrigeration RT/RC Prep Quiz

Topics: All categories in the pool

Quiz Result Settings

1: 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

2: Which refrigerant class listed below is the most flammable?

  • A-1
  • A-3
  • C-3
  • B-2

3: The certificate of inspection

  • shall be $20 and an additional fee of $1 for each tone above 20 tons
  • shall be authorized by a notarized insurance company
  • shall be posted on the compressor shell or electrical panel at the unit
  • shall be posted and protected from dirt, water, and other elements

4: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?

  • Flush with R-11
  • Flush with ammonia
  • Flush with RX-11
  • Flush with R-718

5: Ammonia can come in contact with _______ ?

  • Aluminum
  • Copper tubing
  • Brass
  • Copper

6: How many forces operate a thermostatic expansion valve?

  • 4
  • 3
  • 1
  • 2

7: In an air conditioning plant which an indirect low side, water is used inside of bring: the proper sequence of operating the plan is

  • reset the safety valve
  • start the comrpessor
  • reset the expansion valve
  • start the fan and circulating pump

8: The Department that certifies the transportation of refrigerant is the

  • RSES
  • DOT
  • EPO
  • EPA

9: The high side float assembly meters refrigerant into the evaporator through the

  • lower chamber of the high side
  • upper chamber of the low side
  • upper chamber of the high side
  • lower chamber of the low side

10: What is not a requirement of a Class T machine room?

  • Automatic ventilation
  • Tight fitting doors
  • Self-closing doors
  • Fire hose connected to the building fire protection system.

11: Each machinery room shall contain

  • high and low pressure controls
  • a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
  • smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
  • a refrigerant detector located in an area where the refrigerant from a leak will concentrate

12: What does an anemometer measure?

  • amperage
  • voltage
  • temperature
  • velocity

13: The purpose of a receiver is

  • a vessel to store refrigerant outside the system
  • to increase the capacity that the system can hold
  • to use a a later date
  • all of the above

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

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

15: When a refrigeration or air conditioning system is installed

  • a field inspection shall be made before it is put into service
  • it shall be approved by the owner for proper operation.
  • it shall not be operated below prescribed pressures
  • the form of certificate shall be authorized by the Department of Pubic safety

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

  • 25'
  • 36'
  • 10'
  • 15'

17: What is the state of the refrigerant leaving the evaporator?

  • a high temperature subcooled liquid
  • low temperature superheated vapor
  • a high temperature superheated vapor
  • a low temperature subcooled liquid

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

  • junction
  • series-parallel
  • series
  • parallel

19: Which of the following most closely represents the concentration of Li-Br in a absorption system?

  • 50% Li-Br, 50% tap water
  • 40% Li-Br, 60% distilled water
  • 40% Li-Br, 60% tap water
  • 60% Li-Br, 40% distilled water

20: A mixed occupancy occurs when two or more occupancies are located with the same building

  • true
  • false

21: What refrigerant is an inorganic compound?

  • R-22
  • R-132A
  • Ammonia
  • R-410A

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

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

23: Where a refrigeration or air conditioning system is installed,

  • the form or certificate shall be authorized by the Department of Public Safety
  • The company who installed the system must notify the fire department in the jurisdiction where installed
  • A field inspection shall be made before it is put into service
  • it shall not be operated below prescribed pressuers

24: Before you change the type of refrigerant in a refrigeration system, what three things must be done?

  • Nothing must be done
  • Make sure its compatible, notify owner, and notify AHJ.
  • you can never change refrigerants
  • Place sign, check for leaks, and insulate suction line

25: Whoever owns/uses a refrigeration or air conditioning system covered by this code

  • must notify the Department of Public Safety prior to starting the system
  • shall be licensed by the Commonwealth of Massachusetts according to CMR 522
  • shall make application for inspections to the Chief of Inspectors
  • None of the above