ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: High pressure controls should be set no higher than

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

2: Fusible plugs shall not be used with pressure vessels of

  • 15 square feet or less
  • 3 cubic feet or less
  • 15 cubic feet or more
  • 3 cubic feet or more

3: What is a Category "D" fluid?

  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
  • 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

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

  • Magnesium alloy
  • PVC
  • Copper
  • Stainless steel

5: Large mercantile occupancy is

  • a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
  • a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
  • a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
  • a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise

6: 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

7: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?

  • R-718 is not rated unlimited because it's a dangerous refrigerant
  • Because it's cheap
  • Because it's a non-flammable refrigerant
  • Because it's water

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

  • 330
  • 100
  • 150
  • 200

9: Before you change the type of refrigerant in a refrigeration system, what three things must be done?

  • place sign, check for leaks, insulate
  • make sure it's compatible, notify owner, notify A.H.J
  • you can't change refrigerants
  • nothing must be done

10: 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

11: The certificate of inspection

  • shall be $20 and an additional fee of $1 for each tone above 20 tons
  • shall be authorized by a notarized insurance company
  • shall be posted and protected from dirt, water, and other elements
  • shall be posted on the compressor shell or electrical panel at the unit

12: 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

13: What must be done if refrigeration lines pass through a concrete floor?

  • installed through a pipe casing
  • insulated
  • leak checked
  • moisture barrier

14: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?

  • Flush with ammonia
  • Flush with R-11
  • Flush with R-718
  • Flush with RX-11

15: How are refrigerant blends classified?

  • Based on the oil used
  • Based on worst case fractionation
  • Based on best case Fractionation
  • Blends don't have to be classified

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

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

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

  • True
  • False

18: Name an HCFC refrigerant(s):

  • R-22
  • R-123
  • R-11
  • both a & b

19: Halogenated refrigerants cannot be used with what material?

  • Aluminum
  • Copper
  • Stainless steel
  • Magnesium alloy

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

  • 66
  • 22
  • 25
  • 50

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

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

22: When is the only time you can leave a service container attached to a system?

  • Leaking system
  • Recovery
  • Charging
  • Both b and c

23: Who approves containers for refrigerants?

  • D.O.D
  • E.P.A
  • D.O.E
  • D.O.T

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

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

25: 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