ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: 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

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

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

3: Pressure limiting devices are not required for systems containing less then ________ refrigerants.

  • 22 lbs
  • 6.6 lbs
  • 13.9 lbs
  • 44 lbs

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

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

5: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?

  • refrigerant sensing
  • A group sensing
  • CO Sensing
  • phosgene gas sening

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

  • Nickel
  • Copper
  • Magnesium
  • Zinc

7: 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

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

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

9: The color code of a tank of ammonia is

  • white
  • silver
  • lavender
  • light green

10: What is a Category "D" fluid?

  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
  • A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
  • 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

11: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere

  • 6.6
  • 110
  • 1,000
  • 330

12: What would be the classification of a church?

  • Industrial
  • Place of assembly
  • Institutional
  • Large mercantile

13: What is not a requirement of a Class T machine room?

  • Tight fitting doors
  • Self-closing doors
  • Fire hose connected to the building fire protection system.
  • Automatic ventilation

14: Class T machine room

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

15: Where a refrigeration or air conditioning system is installed,

  • it shall not be operated below prescribed pressuers
  • A field inspection shall be made before it is put into service
  • The company who installed the system must notify the fire department in the jurisdiction where installed
  • the form or certificate shall be authorized by the Department of Public Safety

16: When should a relief valve start to function?

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

17: What is Trichlorotrifluoromethane?

  • R-13
  • R-12
  • R-113
  • R-11

18: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the

  • breaker panel in
  • load-side of the contactor in
  • first disconnect in
  • 24 volt secondary side of the Class 2 transformer to the thermostat

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

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

20: The main cause of enacting the "no vending rule" of July 1st 1992 was

  • global warming potential
  • ozone depletion
  • both a & b
  • None of the above

21: Each machinery room shall contain

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

22: The certificate of inspection

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

23: 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
  • 100
  • 1,000

24: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.

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

25: What is R-22?

  • Chlorofluoromethane
  • Chlorodifluoromethane
  • HFC
  • CCFCM