ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered

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

2: Pressure vessels of 10 cubic feet or more gross volume shall use

  • at least one rupture member
  • a dual pressure-relief valve if charging into the atmosphere
  • at least three means of discharge and/or rupture discs
  • both a and b are correct

3: R-22 falls under which safety classification?

  • A-1
  • B-2
  • A-2
  • B-1

4: 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

  • outside the machinery room
  • boiler
  • evaporator
  • compressor

5: R-717 is

  • carbon dioxide
  • ammonia
  • trichloromethane
  • water

6: The discharge relief valve is located (9.4.6)

  • on top of the condensor
  • between the compressor and the stop valve
  • between the compressor and reciever
  • between the compressor and oil separator

7: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed

  • 500 lbs
  • 55 lbs
  • 660 lbs
  • 330 lbs

8: How much clearance do you need around the perimeter of electrical panels?

  • 36"
  • 12"
  • 18"
  • 24"

9: How much refrigerant can be stored in a mechanical room outside of the system?

  • 100
  • 150
  • 330
  • 200

10: Systems containing more than 110 pounds must have stop valves located at the

  • compressor suction inlet
  • compressor discharge outlet
  • receiver inlet and outlet
  • All of the above

11: How many refrigerant classifications are there for flammability?

  • 3
  • 2
  • 7
  • 1

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

  • 50
  • 18
  • 33
  • 22

13: What do you need to do when you install a new system?

  • Add refrigerant
  • Insulate the suction line before you take a superheat reading
  • Document the superheat and subcooling reading
  • Have it inspected

14: 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

15: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested

  • annually
  • regularly
  • quarterly
  • bi-annually

16: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 22
  • 66
  • 50
  • 25

17: A room having machinery but no flame producing apparatus permanently installed and operated is considered a

  • Class T machinery room
  • Class B machinery room
  • Class A machinery room
  • Class M machinery room

18: What must be done to refrigerant pipes before being buried ?(8.10.4)

  • Classifed
  • Leak checked
  • Insulated and installed in a pipe duct (Encased)
  • Certified

19: What type of refrigerants are NOT flammable?

  • CHC
  • HFC
  • HCFC
  • All of the above

20: Where are the three places that the discharge from an ammonia relief valve be piped?

  • To chemical neutralizing tank only
  • Underground, into drain, into mechanical room
  • Atmosphere, Tank containing water, where the AHJ indicates.
  • None of the above.

21: A High-Probability System

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

22: A Low-Probability System

  • is such that a leak of refrigerant from a failed connection can not enter the occupied space
  • is such that a leak of refrigerant from a failed connection will enter the occupied space
  • is a system highly likely to leak form a failed connection or component of such system
  • is such that any leak will cause injury or death to anyone within a 100 square foot area

23: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.

  • 20
  • 50
  • 15
  • 75

24: What type of copper is not permitted on refrigeration systems?

  • Type K
  • Type M
  • Type N
  • Type L

25: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?

  • 10,000
  • 1,000
  • 100
  • 100,000