Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
quarterly
bi-annually
annually
regularly
2: Refrigeration piping before being buried shall be
leak tested
encased in pipe duct
pressure tested
All of the above
3: R-123 belongs to Group
B-3
B-2
A-3
B-1
4: 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
5: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.
color-coded glass to determine type of refrigerant
moisture indicators
automatic closing shut-off valves
All of the above
6: 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
7: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
UV or UR
UM or UL
UL and UR
UL and UM
8: What section governs pressure vessels?
Section 1 ASHREA 15 ASME fired
OSHA
Section 8 ASHREA 15 ASME unfired
Section ASHREA 34
9: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
80%
99%
75%
90%
10: Direct systems using Group II refrigerants
shall not be used for air condition for human comfort
shall be allowed to be used for human comfort.
shall be installed per instruction of the AHJ
shall be installed in Class T machinery rooms
11: 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
12: What must be done to refrigerant pipes before being buried?
Coated
Certified
Encased
Leaked checked
13: A Low-Probability System
is such that a leak of refrigerant from a failed connection will enter the occupied space
is such that a leak of refrigerant from a failed connection can not enter the occupied 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 form a failed connection or component of such system
14: Which of the following is an inorganic refrigerant?
R-22
Ammonia
Chlorofluorocarbons
All of the above
15: Machinery rooms must be vented to ______?
outdoors
unoccupied spaces
basement
neutralizing tank
16: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
14 days
30 days
2 months
1 week
17: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?
R-718 is not rated unlimited because it's a dangerous refrigerant
Because it's cheap
Because it's water
Because it's a non-flammable refrigerant
18: When can recovered refrigerants be reused?
They can't
Only when used in original owner's equipment
Only if used in 30 days of recovery
None of the above
19: 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 technician
welder qualified
licensed welder
competent welder
20: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
you can never change refrigerants
Place sign, check for leaks, and insulate suction line
Nothing must be done
Make sure its compatible, notify owner, and notify AHJ.
21: A relief valve shall be located at least ___ above grade.
10'
25'
15'
36'
22: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by
District Engineering Inspectors
Commissioned Inspectors
Master licensed Technician
both a or b
23: How many gallons of water per pound of ammonia do you need?
1
20
5
15
24: What is the refrigerant dichlorodifluoromethane?
R-134A
R-22
R-123
R-12
25: Joints in piping for refrigeration containing parts must withstand temperatures of ___?