Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: What section of ASHRAE-15 governs pressure vessels?
Section 6 ASHRAE-34 ASME VIII unfired
OSHA
Section 7 ASHRAE-15 ASME VIII fired
Section 9 ASHRAE-15 ASME VIII unfired
2: How far from the window does a relief valve need to be according to ASHRAE-15?
At least 20'
At least 30'
There is no minimum for relief valve and windows.
At least 40'
3: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant
does not require a pressure-limiting device
shall have a pressure limiting device installed on the high side of the system
shall have a pressure limiting device and a pressure relief valve installed
shall be inspected by the Boiler of Inspectors bi-annually
4: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
“U” or “UM”
“UM” and “UV”
“UL”
“UV”
5: Which of the following is an inorganic refrigerant?
R-22
Ammonia
Chlorofluorocarbons
All of the above
6: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
there is no Group B1 refrigerants
the same
higher
lower
7: How much refrigerant can be stored in a mechanical room outside of the system?
200
330
100
150
8: Refrigeration piping before being buried shall be
leak tested
encased in pipe duct
pressure tested
All of the above
9: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.
20
10
15
25
10: 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
11: The color code of a tank of ammonia is
white
light green
silver
lavender
12: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?
Flush with R-11
Flush with RX-11
Flush with R-718
Flush with ammonia
13: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
24
10
18
15
14: A positive displacement compressor is
is a reciprocating type compressor with 2 or more pistons
where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
15: Pressure vessels of 10 cubic feet or more gross volume shall use
at least one rupture member
a dual pressure-relief valve if charging into the atmosphere
at least three means of discharge and/or rupture discs
both a and b are correct
16: Systems containing more than 110 pounds must have stop valves located at the
compressor suction inlet
compressor discharge outlet
receiver inlet and outlet
All of the above
17: Direct systems using Group II refrigerants
shall be allowed to be used for human comfort.
shall be installed in Class T machinery rooms
shall not be used for air condition for human comfort
shall be installed per instruction of the AHJ
18: Where must a refrigeration contractor's license number be displayed?
Trucks, license plates, and uniforms
Trucks, invoices, and advertising
Truck, office, every job, and on all equipment
Uniforms, checks, and invoices.
19: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
Class B machinery room
Class M machinery room
Class T machinery room
Class A machinery room
20: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.
7.00'
8'4"
9.00'
7.25'
21: An example of direct system is
rooftop unit
chiller
absorber
none of the above
22: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
there is no Group B1 refrigerants
lower
the same
higher
23: 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)
commercial occupancy
institutional occupancy
illegal occupancy
public assembly occupancy
24: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.
20
50
15
75
25: A High-Probablity system
is such that a leak of refrigerant from failed connections will enter the occupied space
is such that any leak will cause injury or death to anyone within a 100 square foot area
is such that a leak of refrigerant from failed connections will enter the unoccupied space
is a system highly likely to leak from a failed connection or component of such system