Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: What refrigerant has zero ozone depletion
HFC
CFC
HCFC
None of the above
2: 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
load-side of the contactor in
first disconnect in
breaker panel in
24 volt secondary side of the Class 2 transformer to the thermostat
3: A restaurant is classified as a
public assembly occupancy
large mercantile occupancy
mixed occupancy
commercial occupancy
4: Refrigerants shall be classified by
requirements for commercial, industrial, and residential occupancies
maximum permissible quantities of each group
toxicity and flammability
color codes
5: What is a Category "M" fluid?
A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and the designed temperature is between -20F to 366F
Any fluid that exceeds 150 psig and has design temperatures over 366F
A typical refrigerant used on newer air conditioning and heat pump systems
A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
6: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.
350
400
100
250
7: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
1
2
3
5
8: When a refrigeration or air conditioning system is installed
a field inspection shall be made before it is put into service
it shall be approved by the owner for proper operation.
the form of certificate shall be authorized by the Department of Pubic safety
it shall not be operated below prescribed pressures
9: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
mixed occupancy
commercial occupancy
public assembly occupancy
institutional occupancy
10: System design pressures must take into consideration, not only, pressures found during normal operation but also what?
When it's cold out
When there is a malfunction on the high side
When its warm out
All of the above
11: What type of pressure relief device is used on a CO2 system?
Gate valve
Rupture disk
Glove valve
Fusible plug
12: 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
boiler
evaporator
outside the machinery room
compressor
13: 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
14: 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.
550
100
350
50
15: When air is ducted through a machine room that services occupied space, What must be done?
Welded and seamed.
Insulated and cross broke
Ducted and sealed
Flanged and gasketed
16: Ammonia belongs to Group
B-2
B-1
A-2
A-1
17: 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.
18: _____ alloys shall not be used in contact with an halogenated refrigerants.
Copper
Magnesium
Nickel
Zinc
19: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.
CFC-11
ammonia
Lithium bromide
HCFC-123
20: Low temperature systems should have what?
High pour point
Low pour point
High viscosity
None of the above
21: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
UL and UR
UL and UM
UV or UR
UM or UL
22: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
over pressure protection
over pressure protection and a rupture disc
over pressure protection as well as a temperature protection device
23: What type of relief valve is used on a CO2 system?
rupture disc
gate valve
glove disc
fusible plug
24: 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.