ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Ammonia can come in contact with _______ ?

  • Aluminum
  • Copper
  • Copper tubing
  • Brass

2: How are refrigerant blends classified?

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

3: A movie theater would be considered a

  • mixed occupancy
  • institutional occupancy
  • public assembly occupancy
  • commercial occupancy

4: What refrigerant doesn't have to be classified?

  • R-717
  • R-422A
  • R-718
  • R-134A

5: A machine room with a refrigerant system using ammonia shall

  • be provided with a continuously operated ventilation system
  • be considered a non-hazardous location in accordance with National Electrical code
  • have no flame producing apparatus permanently installed and operated
  • All of the above

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

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

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

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

8: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?

  • R-12
  • R-11
  • R-22
  • R-113

9: R-22 is classified as a ____ refrigerant on the safety matrix.

  • B-1
  • A-2
  • B-2
  • A-1

10: 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

11: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.

  • True
  • False

12: _____ and its alloys are suitable for use with ammonia systems.

  • Zinc
  • Magnesium
  • Aluminum
  • Copper

13: 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

14: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants

  • there is no Group B1 refrigerants
  • the same
  • higher
  • lower

15: What must be done to all doors and access points in duct work going through a mechanical room?

  • Must be hindged
  • Must be screwed shut
  • Must be sealed and gasketed
  • All of the above

16: What type of refrigerants are NOT flammable?

  • CHC
  • HFC
  • HCFC
  • All of the above

17: Stop valves shall not be permitted between the system and the

  • relief valve
  • bleed valve
  • condenser
  • service valve

18: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the

  • evaporator
  • compressor
  • outside the machinery room
  • boiler

19: Which occupancy can ammonia be used in?

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

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

  • aluminum
  • zinc
  • magnesium
  • all of the above

21: What section governs pressure vessels?

  • OSHA
  • Section 1 ASHREA 15 ASME fired
  • Section 8 ASHREA 15 ASME unfired
  • Section ASHREA 34

22: Class 3 refrigerants are

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

23: All electrical work done on refrigeration systems must comply with

  • Department of Energy
  • NEC and Massachusetts Modifications
  • OSHA
  • ASHREA-15 Section 9.2.1

24: 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.

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

25: What type of material can't be used on the outlet of a relief valve?

  • Stainless steel
  • PVC
  • Magnesium alloy
  • Copper