ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Pipe identification labels are required when the system contains more than

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

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

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

3: What refrigerant is an inorganic compound?

  • R-410A
  • Ammonia
  • R-132A
  • R-22

4: Class T machine room

  • shall include closets used for setting equipment
  • shall have remote controls to stop the action of the refrigerant compressor
  • shall have refrigerant leak detecting systems installed inside and outside the room
  • has no flame producing apparatus permanently installed

5: Pressure vessels with an internal volume of 3 cubic feet or less

  • shall use fusible plugs
  • shall use pressure relief devices
  • do not need pressure relief protection
  • shall use pressure relief devices or fusible plugs

6: Class A refrigerants are considered

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

7: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.

  • 2.2
  • 1.2
  • 1
  • 1.5

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

  • 33
  • 22
  • 50
  • 18

9: What is a Category "D" fluid?

  • Any fluid that exceeds 150 psig and has design temperature of over 366F
  • A typical refrigerant used on newer air conditioning and heat pump ssytems
  • A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact

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

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

11: Setting a pressure relief device shall not exceed ___ of the design pressure

  • 100%
  • 90%
  • 80%
  • 75%

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

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

13: 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

14: 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

15: How far from the window does a relief valve need to be according to ASHRAE-15?

  • At least 40'
  • At least 20'
  • There is no minimum for relief valve and windows.
  • At least 30'

16: There can be no airflow from an occupied space through a machine room unless what?

  • System is high velocity
  • System is ducted and sealed
  • Duct is not located in the ceiling
  • None of the above.

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

  • Copper
  • Aluminum
  • PVC
  • Stainless Steel

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

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

19: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code

  • over pressure protection and a rupture disc
  • over pressure protection as well as a temperature protection device
  • over pressure protection
  • Pressure vessels need no type of protection as long as it is hydrostatically tested every three months

20: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.

  • 100
  • 350
  • 50
  • 550

21: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.

  • color-coded glass to determine type of refrigerant
  • moisture indicators
  • automatic closing shut-off valves
  • All of the above

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

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

23: Institutional occupancy is

  • a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • None of the above

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

  • 36"
  • 12"
  • 24"
  • 18"

25: A 3-cubic foot receiver must have what type of relief valve?

  • fusible plug
  • relief valve
  • rupture device
  • none of the above