Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: What is not a requirement of a class T machine room?
self-closing doors
fire hose connection to the building fire protection system
automatic ventilation
tight fitting doors
2: What would be the classification of a prison?
Large mercantile
Industrial
Institutional
Place of assembly
3: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
shall be prohibited
containing R-11, R-123 & R-717 exclusively shall not be prohibited
of Group B2 refrigerant shall be prohibited
shall not be prohibited
4: R-11 belongs to Group
A-2
A-1
B-3
B-1
5: Class A refrigerants are considered
flammable
non-flammable
non-toxic
toxic
6: Methyl Chloride is a halogenated refrigerant and should not come in contact with
aluminum
zinc
magnesium
all of the above
7: There can be no airflow from an occupied space through a machine room unless what?
System is high velocity
System is ducted and sealed
Duct is not located in the ceiling
None of the above.
8: Industrial occupancy is
a premise or that portion of a premise that is not open to the public, where access by authorized persons is controlled, and that is used to manufacture, process, or store goods, such as chemicals, food, ice, meat, or petroleum.
is a premise or that portion of a premise where large number of people congregate and from which occupants cannot quickly vacate the space.
a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
Both a and b are correct
9: Relief valves are rated in
gallons of water per minute
gallons of water per hour
pounds of air per hour
pounds of air per minute
10: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
100,000
1,000
100
10,000
11: 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
12: What type of material can't be used on the outlet of a relief valve?
Magnesium alloy
PVC
Stainless steel
Copper
13: A pressure relief should be located at least _______ from windows and doors.
20'
15'
25'
30'
14: The 522 CMR 9.00 has adopted for reference ASHRAE ____
10
III
25
15
15: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into
the low-pressure side of the system
the high side of the system
the liquid receiver
both a and c are correct
16: Evaporators within 18" of a heating coil must be equipped with a
low limit control
zone valve
high limit control
pressure relief device
17: The gauge thickness required on a CO2 tank construction is
1/16"
5/16"
1/8"
3/32"
18: Halo-carbon refrigerants cannot be used with what material?
Magnesium alloy
Copper
Stainless Steel
Aluminum
19: How many different groups of refrigerants are there?
3
11
15
7
20: A relief valve discharge capacity is rated in
temperature minus pounds of air per second divided by release rate squared
PSIG
Pounds of air per minute.
PSIA
21: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
Place sign, check for leaks, and insulate suction line
you can never change refrigerants
Make sure its compatible, notify owner, and notify AHJ.
Nothing must be done
22: Halogen refrigerants are corrosive to which type of metal?
magnesium
stainless steel
black iron
copper
23: 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
24: Pressure vessels with an internal volume of 3 cubic feet or more
do not need pressure relief protection
shall use fusible plugs
shall use pressure relief devices or fusible plugs
shall use pressure relief devices
25: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the