Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: How many groups of refrigerants are there?
1
3
7
5
2: Pipe identification labels are required when the system contains more than
120 lbs
65 lbs
110 lbs
55 lbs
3: 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
4: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
18
10
15
24
5: How are refrigerant blends classified?
Based on worst case fractionation
Based on best case Fractionation
Based on the oil used
Blends don't have to be classified
6: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
True
False
7: 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
8: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
330 lbs
55 lbs
660 lbs
500 lbs
9: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.
50
350
550
100
10: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
22 lbs
13.9 lbs
44 lbs
6.6 lbs
11: The color code of a tank of ammonia is
silver
white
light green
lavender
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
licensed welder
licensed technician
competent welder
welder qualified
13: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
UM or UL
UV or UR
UL and UM
UL and UR
14: What section of ASHRAE-15 governs pressure vessels?
OSHA
Section 9 ASHRAE-15 ASME VIII unfired
Section 7 ASHRAE-15 ASME VIII fired
Section 6 ASHRAE-34 ASME VIII unfired
15: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
nothing must be done
make sure it's compatible, notify owner, notify A.H.J
place sign, check for leaks, insulate
you can't change refrigerants
16: What section governs pressure vessels?
Section ASHREA 34
Section 1 ASHREA 15 ASME fired
Section 8 ASHREA 15 ASME unfired
OSHA
17: The Department that certifies the transportation of refrigerant is the
RSES
EPO
EPA
DOT
18: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
public assembly occupancy.
mercantile occupancy
business occupancy
commercial occupancy
19: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.
2.5, 2.5
6.6, 6.6
2.5, 3.0
3.0, 3.5
20: 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)
public assembly occupancy
institutional occupancy
illegal occupancy
commercial occupancy
21: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.
7.25'
7.00'
8'4"
9.00'
22: A relief valve shall be located at least ___ above grade.
15'
25'
10'
36'
23: What is the refrigerant dichlorodifluoromethane?
R-134A
R-12
R-22
R-123
24: Halo-carbon refrigerants cannot be used with what material?
Magnesium alloy
Stainless Steel
Aluminum
Copper
25: Methyl Chloride is a halogenated refrigerant and should not come in contact with