ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.

  • UV or UR
  • UL and UM
  • UL and UR
  • UM or UL

2: High pressure controls should be set no higher than

  • 25% of set point
  • 10% of set point
  • 80% of set point
  • 90% of set point

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

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

4: Pressure limiting devices are not required for systems containing less then ________ refrigerants.

  • 22 lbs
  • 6.6 lbs
  • 13.9 lbs
  • 44 lbs

5: No open flames are allowed in the machinery room unless?

  • Approved by the authorized person
  • Never can be allowed
  • Approved by the installing contractor
  • Only when combustion air is provided from outside of the machinery room

6: A hotel is considered a _______ occupancy.

  • institutional
  • mercantile
  • residential
  • commercial

7: What type of pressure relief device is used on a CO2 system?

  • Fusible plug
  • Gate valve
  • Glove valve
  • Rupture disk

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

  • atmosphere, tank containing water, where the A.H.J. indicates
  • underground, into drain, into mechanical room
  • to chemical neutralizing tank only
  • none of the above

9: Ammonia is under what safety classification?

  • B1
  • B3
  • A3
  • B2

10: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into

  • the low-pressure side of the system
  • the high side of the system
  • the liquid receiver
  • both a and c are correct

11: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.

  • 250
  • 400
  • 350
  • 100

12: Which occupancy can ammonia be used in?

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

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

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

14: 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

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

  • PVC
  • Aluminum
  • Stainless Steel
  • Copper

16: Where must a refrigeration contractor's license number be displayed?

  • Trucks, invoices, and advertising
  • Trucks, license plates, and uniforms
  • Uniforms, checks, and invoices.
  • Truck, office, every job, and on all equipment

17: 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

  • boiler
  • compressor
  • evaporator
  • outside the machinery room

18: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.

  • True
  • False

19: What is an example of institutional occupancy?

  • Shopping mall
  • Dorms
  • Hospital
  • Football stadium

20: 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.

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

21: Low temperature systems should have what?

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

22: Relief valves are rated in

  • pounds of air per minute
  • gallons of water per hour
  • gallons of water per minute
  • pounds of air per hour

23: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code

  • licensed technician
  • licensed welder
  • welder qualified
  • competent welder

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

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

25: Dual-pressure relief devices should be installed on

  • vessels of 3 cubic feet or more
  • vessels of 10 cubic feet or more
  • vessels of 3 cubic feet or less
  • vessels of 10 cubic feet or less