ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?

  • When its white
  • When there is a space 6' or more above it
  • When it's used as part of a supply or return air system
  • When there are sprinklers above

2: 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
  • 100,000
  • 1,000
  • 100

3: How far from the ground does a relief valve need to be?

  • Not more than 3' above grade
  • At least 25' above grade
  • At least 15' above grade
  • At least 20' above grade

4: A High-Probablity system

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

5: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)

  • institutional occupancy
  • commercial occupancy
  • illegal occupancy
  • public assembly occupancy

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

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

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

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

8: 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

9: 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.

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

10: All serviceable components of a refrigeration system shall be provided with

  • manufactures instructions on start-up procedures
  • name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
  • service manuals
  • safe access

11: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.

  • critical pressure
  • design pressure
  • high pressure
  • low pressure

12: 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.
  • Place sign, check for leaks, and insulate suction line
  • you can never change refrigerants

13: A declaration test is needed when the system contains more than

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

14: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.

  • 5.5
  • 3.0
  • 2.0
  • 2.5

15: How many gallons of water per pound of ammonia do you need?

  • 1
  • 5
  • 15
  • 20

16: Class 3 refrigerants are

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

17: How many CFMs are required per square foot of commercial office occupied space

  • 15 CFM
  • 20 CFM
  • 5 CFM
  • .5 CFM

18: How many refrigerant classifications are there for flammability?

  • 3
  • 1
  • 7
  • 2

19: The discharge relief valve is located (9.4.6)

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

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

  • commercial
  • business
  • mercantile
  • public assembly

21: Ammonia is under what safety classification?

  • B3
  • A3
  • B2
  • B1

22: What happens after your initial inspection of a pressure vessel?

  • Notify the Fire Marshal that the system has been inspected and approved
  • There is a temporary shut-down until a final inspection can be performed.
  • Inspector leaves a metal tag with a certification listed on it
  • Notify the AHJ to let them know that the system been inspected

23: A Category D fluid

  • is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
  • is when the design pressure does not exceed 150 psi
  • a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
  • Both a and b are correct

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

  • 200
  • 100
  • 330
  • 150

25: 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