ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: What would be the classification of a church?

  • Institutional
  • Industrial
  • Place of assembly
  • Large mercantile

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

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

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

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

4: Where are the three places that the discharge from an ammonia relief valve be piped?

  • To chemical neutralizing tank only
  • Underground, into drain, into mechanical room
  • Atmosphere, Tank containing water, where the AHJ indicates.
  • None of the above.

5: Halogen refrigerants are corrosive to which type of metal?

  • magnesium
  • black iron
  • copper
  • stainless steel

6: 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 20' above grade
  • At least 15' above grade

7: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within

  • 30 days
  • 2 months
  • 1 week
  • 14 days

8: How many different groups of refrigerants are there?

  • 11
  • 15
  • 3
  • 7

9: What is R-22?

  • Chlorodifluoromethane
  • Chlorofluoromethane
  • CCFCM
  • HFC

10: B3 refrigerants are considered

  • non-toxic but flammable
  • non-toxic but non-flammable
  • toxic and highly flammable
  • toxic but non-flammable

11: Can ammonia be used on domestic system?

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

12: When should a relief valve start to function?

  • 10 psi before it's set pressure
  • Two times it's working pressure
  • At it's set pressure
  • Before the purge station discharges

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

  • 50
  • 22
  • 66
  • 25

14: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants

  • the same
  • lower
  • higher
  • there is no Group B1 refrigerants

15: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.

  • the mechanical room housing the refrigeration system
  • Machinery rooms need not be vented
  • the outdoors
  • the return air ducted system

16: How many groups of refrigerants are there?

  • 1
  • 3
  • 7
  • 5

17: Fusible plugs must have what marked on them?

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

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

  • PVC
  • Aluminum
  • Copper
  • Stainless Steel

19: A relief valve shall be located at least ___ above grade.

  • 36'
  • 10'
  • 15'
  • 25'

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

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

21: R-12. R-22, and R-40 are considered Group I refrigerants.

  • True
  • False

22: What is a Category "D" fluid?

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

23: Halo-carbon refrigerants cannot be used with what material?

  • Stainless Steel
  • Aluminum
  • Copper
  • Magnesium alloy

24: Each machinery room shall contain

  • a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
  • a refrigerant detector located in an area where the refrigerant from a leak will concentrate
  • high and low pressure controls
  • smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements

25: Which refrigerant class listed below is the most flammable?

  • C3
  • A3
  • B2
  • A2