ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: System design pressures must take into consideration, not only, pressures found during normal operation but also what?

  • When it's cold out
  • When there is a malfunction on the high side
  • When its warm out
  • All of the above

2: How many flammability classifications are refrigerants in?

  • 2
  • 7
  • 5
  • 3

3: The Board of Boilers adopts by reference

  • MSCA Code
  • the 1997 ANSI/ASHRAE Safety Code
  • the MACS Pressure Vessel Code of Massachusetts
  • Montreal Protocol Safety Code

4: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.

  • Lithium bromide
  • CFC-11
  • HCFC-123
  • ammonia

5: A class A3 refrigerant is considered

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

6: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.

  • 3.0, 3.5
  • 2.5, 2.5
  • 2.5, 3.0
  • 6.6, 6.6

7: How many groups of refrigerants are there?

  • 3
  • 7
  • 1
  • 5

8: Which occupancy can ammonia be used in?

  • commercial
  • industrial
  • redifential
  • depends on the quantity of freon

9: Low temperature systems should have what?

  • High pour point
  • Low pour point
  • High viscosity
  • None of the above

10: Single compound Refrigerants are classified by what two criteria?

  • Weight and color
  • Flammability and temperature range
  • Temperature range and hazardousness
  • Flammability and toxicity

11: The main purpose of a refrigerant detector in a machinery room is to

  • inform there is a refrigerant leak int he system
  • detect toxins in the air caused by a refrigerant leak
  • to set off an alarm when there is refrigerant present inside the room
  • all of the above

12: Which refrigerant replaced R-12?

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

13: Halo-carbon refrigerants cannot be used with what material?

  • Stainless Steel
  • Copper
  • Aluminum
  • Magnesium alloy

14: When a refrigeration or air conditioning system is installed

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

15: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.

  • 50
  • 55
  • 75
  • 15

16: Class A refrigerants are considered

  • non-flammable
  • toxic
  • non-toxic
  • flammable

17: What must be done to refrigerant pipes before being buried?

  • Coated
  • Leaked checked
  • Encased
  • Certified

18: Each machinery room shall contain

  • a refrigerant detector located in an area where the refrigerant 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 toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
  • high and low pressure controls

19: A professional or office building would be considered what type of occupancy?

  • public assembly
  • mercantile
  • commercial
  • business

20: What type of relief valve is used on low pressure centrifugal compressor systems?

  • Spring-loaded relief valve
  • Rupture disc
  • Purge relief
  • None of the above

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

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

22: Pipe identification labels are required when the system contains more than

  • 55 lbs
  • 120 lbs
  • 65 lbs
  • 110 lbs

23: A hotel is considered a _______ occupancy.

  • mercantile
  • institutional
  • commercial
  • residential

24: Halogenated refrigerants cannot be used with what material?

  • Stainless steel
  • Aluminum
  • Copper
  • Magnesium alloy

25: A plug containing an alloy that will melt at a specific temperature to relief pressure is a

  • relief plug
  • fusion plug
  • rupture plug
  • fusible plug