Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
2.5
5.5
3.0
2.0
2: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.
True
False
3: Halo-carbon refrigerants cannot be used with what material?
Copper
Magnesium alloy
Aluminum
Stainless Steel
4: Which refrigerant class listed below is the most flammable?
A-1
C-3
B-2
A-3
5: Ammonia can come in contact with _______ ?
Copper tubing
Aluminum
Brass
Copper
6: What type of copper is not permitted on refrigeration systems?
Type N
Type K
Type M
Type L
7: When is the only time you can leave a service container attached to a system?
Leaking system
Recovery
Charging
Both b and c
8: How many groups of refrigerants are there?
7
5
3
1
9: 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
10: R-410A is classified as a ____ refrigerant on the safety matrix.
A-1
B-1
B-2
A-2
11: The 522 CMR 9.00 has adopted for reference ASHRAE ____
25
15
10
III
12: R-12. R-22, and R-40 are considered Group I refrigerants.
True
False
13: How many refrigerant classifications are there for toxicity?
1
3
2
5
14: A High-Probablity system
is such that a leak of refrigerant from failed connections will enter the occupied space
is such that a leak of refrigerant from failed connections will enter the unoccupied 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 from a failed connection or component of such system
15: R-22 is classified as a ____ refrigerant on the safety matrix.
A-1
A-2
B-2
B-1
16: The color code of a tank of ammonia is
silver
white
light green
lavender
17: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
the vapor side of the system
high side of the system
the liquid side of the system
low side of the system
18: 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
All of the above
19: What would be the classification of a prison?
Institutional
Place of assembly
Large mercantile
Industrial
20: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
800F
1000F
600F
700F
21: How many gallons of water per pound of ammonia do you need?
20
15
5
1
22: Who authorizes changes to the safety codes?
Board of Boilers
Person in charge of the facility
Contractor who last serviced the system.
Person who pulled the permit
23: NH3 is
lithium bromide
R-718
ammonia
R-508A
24: 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
25: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.