ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: _____ alloys shall not be used in contact with an halogenated refrigerants.

  • Nickel
  • Copper
  • Zinc
  • Magnesium

2: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of

  • the ASME Boiler and Pressure Vessel Code
  • Section 11.3.1.5 ASHRAE 15 Standard
  • the ANSI Standard 10.7.2
  • both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5

3: Pressure vessels with an internal volume of 10 cubic feet or more

  • shall use pressure relief devices or fusible plugs
  • shall use rupture discs or duel pressure relief valves
  • shall use pressure relief devices
  • shall use fusible plugs

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

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

5: What section governs pressure vessels?

  • Section ASHREA 34
  • Section 1 ASHREA 15 ASME fired
  • Section 8 ASHREA 15 ASME unfired
  • OSHA

6: Name an HCFC refrigerant(s):

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

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

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

8: Most CFC's are

  • flammable
  • inert but toxic
  • toxic
  • inert

9: All machine rooms must be outfitted with a detector that _______?

  • activates an audible alarm
  • activates a visual alarm
  • starts the ventilation system
  • All of the above

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

  • 50
  • 10
  • 100
  • 1

11: The gauge thickness required on a CO2 tank construction is

  • 5/16"
  • 1/8"
  • 1/16"
  • 3/32"

12: What does “ultimate strength” mean?

  • Design strength of the vessel or piping in a refrigeration system
  • Stress at which rupture will occur
  • Highest or design pressure allowed inside a machinery room
  • None of the above

13: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and

  • the owner shall be informed
  • explosion precautions must be taken
  • gas masks must be worn
  • no flames shall be permitted

14: What is the definition of exit?

  • Anywhere where a stairwell leads to outdoors
  • The separated fire-resistant portion of a means of egress providing a protected travel path between the exit access and the exit discharge
  • Any doorway or pathway unobstructed for access to anywhere considered safe
  • Both a & b

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

  • 12"
  • 18"
  • 36"
  • 24"

16: When must refrigeration system covered by the code be inspected?

  • Annually
  • Not required
  • Upon installation
  • Annually and when installed

17: What is an example of institutional occupancy?

  • Football stadium
  • Dorms
  • Shopping mall
  • Hospital

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

  • 330
  • 100
  • 200
  • 150

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

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

20: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.

  • True
  • False

21: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered

  • public assembly occupancy
  • institutional occupancy
  • commercial occupancy
  • mixed occupancy

22: How many different groups of refrigerants are there?

  • 11
  • 15
  • 7
  • 3

23: NH3 is

  • R-508A
  • lithium bromide
  • R-718
  • ammonia

24: Class A refrigerants are considered

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

25: What is a Category "D" fluid?

  • 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
  • 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