ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: A restaurant is classified as a

  • mixed occupancy
  • commercial occupancy
  • public assembly occupancy
  • large mercantile occupancy

2: 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.

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

3: R-123 belongs to Group

  • A-3
  • B-2
  • B-3
  • B-1

4: A Low-Probability System

  • is a system highly likely to leak form a failed connection or component of such system
  • is such that a leak of refrigerant from a failed connection can not enter the occupied space
  • 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 the occupied space

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

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

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

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

7: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.

  • True
  • False

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

  • 50
  • 66
  • 22
  • 25

9: Can ammonia be used on domestic system?

  • yes
  • no
  • yes, for systems under 10 tons
  • no, unless there is proper ventilation system installed

10: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.

  • shall be prohibited
  • shall not be prohibited
  • containing R-11, R-123 & R-717 exclusively shall not be prohibited
  • of Group B2 refrigerant shall be prohibited

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

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

12: Refrigerants shall be classified by

  • color codes
  • requirements for commercial, industrial, and residential occupancies
  • maximum permissible quantities of each group
  • toxicity and flammability

13: A positive displacement compressor is

  • a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
  • is a reciprocating type compressor with 2 or more pistons
  • where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
  • a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber

14: 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.

  • 55
  • 75
  • 15
  • 50

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

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

16: What is an example of institutional occupancy?

  • Football stadium
  • Shopping mall
  • Hospital
  • Dorms

17: What type of relief valve is used on a CO2 system?

  • gate valve
  • glove disc
  • rupture disc
  • fusible plug

18: The color code of a tank of ammonia is

  • silver
  • white
  • lavender
  • light green

19: Name three things that must be done when changing refrigeration lubricant?

  • You can't change lubricants.
  • Place sign, check for leaks, insulate
  • Nothing must be done
  • Make sure it's compatible, notify owner, notify AHJ

20: Class A refrigerants are considered

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

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

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

22: What is R-22?

  • Chlorodifluoromethane
  • HFC
  • Chlorofluoromethane
  • CCFCM

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

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

24: 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

25: Fusible plugs must have what marked on them?

  • Melting temperature in F
  • Melting temperature in C
  • Opening pressure
  • All of the above