Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: R-22 falls under which safety classification?
A-1
B-1
B-2
A-2
2: R-123 belongs to Group
B-3
B-2
B-1
A-3
3: Class A refrigerants are considered
non-flammable
non-toxic
flammable
toxic
4: All machine rooms must be outfitted with a detector that _______?
activates an audible alarm
activates a visual alarm
starts the ventilation system
All of the above
5: Machinery rooms must be vented to ______?
neutralizing tank
unoccupied spaces
basement
outdoors
6: What would be the classification of a prison?
Large mercantile
Institutional
Place of assembly
Industrial
7: Fusible plugs must have what marked on them?
Melting temperature in F
Melting temperature in C
Opening pressure
All of the above
8: 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
of Group B2 refrigerant shall be prohibited
shall not be prohibited
shall be prohibited
9: 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
10: Doors communicating with outside from a mechanical room must be?
Self-closing, approved, fire door
Self-closing, wooden, fire door
Self-closing, aligned, fire door
Steel, approved, weather-stripped
11: Relief valves are rated in
pounds of air per minute
pounds of air per hour
gallons of water per hour
gallons of water per minute
12: What is not a requirement of a Class T machine room?
Fire hose connected to the building fire protection system.
Self-closing doors
Tight fitting doors
Automatic ventilation
13: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
Moisture indicator
Foot valve
Muffler
Stop valve
14: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?
fusible plug
relief valve
rupture disc
all of the above
15: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
True
False
16: 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
17: 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
18: What is an example of institutional occupancy?
Football stadium
Dorms
Shopping mall
Hospital
19: 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
20: What must be done to refrigerant pipes before being buried ?(8.10.4)
Certified
Classifed
Insulated and installed in a pipe duct (Encased)
Leak checked
21: The 522 CMR 9.00 has adopted for reference ASHRAE ____
25
10
III
15
22: How many gallons of water per pound of ammonia do you need?
15
20
1
5
23: What section governs pressure vessels?
Section ASHREA 34
Section 1 ASHREA 15 ASME fired
Section 8 ASHREA 15 ASME unfired
OSHA
24: What refrigerant doesn't have to be classified?
R-717
R-718
R-134A
R-422A
25: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.
the atmosphere
a de-pressurized recovery tank with a silver top and yellow bottom
a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia