ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: What refrigerant has zero ozone depletion

  • HFC
  • CFC
  • HCFC
  • None of the above

2: R-717 is

  • trichloromethane
  • water
  • carbon dioxide
  • ammonia

3: Class A refrigerants are considered

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

4: Which refrigerant replaced R-12?

  • R-407A
  • R-410A
  • R-22
  • R-134A

5: A High-Probability System

  • is such that a leak of refrigerant from a failed connection will enter an unoccupied space
  • is such that a leak of refrigerant from a failed connection will enter the occupied space
  • is such that any leak will cause injury or death to anyone within a 100 square foot area
  • is a system highly likely to leak form a failed connection or component of such system

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

  • True
  • False

7: 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

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

8: 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 toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
  • high and low pressure controls
  • a refrigerant detector located in an area where the refrigerant from a leak will concentrate

9: What is the refrigerant dichlorodifluoromethane?

  • R-123
  • R-134A
  • R-12
  • R-22

10: The 522 CMR 9.00 has adopted for reference ASHRAE ____

  • III
  • 15
  • 25
  • 10

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

  • 36"
  • 18"
  • 24"
  • 12"

12: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code

  • welder qualified
  • competent welder
  • licensed welder
  • licensed technician

13: 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 on the compressor shell or electrical panel at the unit
  • shall be posted and protected from dirt, water, and other elements

14: What does safe access mean?

  • OSHA approved
  • A clear unobstructed path to the equipment and controls
  • Well-lit exit signs
  • Locked doors

15: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested

  • annually
  • quarterly
  • regularly
  • bi-annually

16: Which of the following is an inorganic refrigerant?

  • R-22
  • Ammonia
  • Chlorofluorocarbons
  • All of the above

17: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?

  • Relief valve
  • Temperature limiter device
  • T&P device
  • Circuit Breaker

18: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.

  • containing R-11, R-123 & R-717 exclusively shall not be prohibited
  • shall be prohibited
  • of Group B2 refrigerant shall be prohibited
  • shall not be prohibited

19: How many refrigerant classifications are there for toxicity?

  • 3
  • 1
  • 2
  • 5

20: 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

21: What is Trichlorotrifluoromethane?

  • R-113
  • R-12
  • R-13
  • R-11

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

  • B-2
  • A-3
  • C-3
  • A-1

23: A plug containing an alloy that will melt at a specific temperature to relief pressure is a

  • fusible plug
  • relief plug
  • fusion plug
  • rupture plug

24: What do you need to do when you install a new system?

  • Document the superheat and subcooling reading
  • Add refrigerant
  • Insulate the suction line before you take a superheat reading
  • Have it inspected

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

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