Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: 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
2: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
5
3
2
1
3: Pipe identification labels are required when the system contains more than
110 lbs
65 lbs
55 lbs
120 lbs
4: 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, 3.0
3.0, 3.5
6.6, 6.6
2.5, 2.5
5: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
UV or UR
UL and UR
UM or UL
UL and UM
6: What kind of material can't be used on the outlet of a relief valve?
PVC
Stainless Steel
Aluminum
Copper
7: What refrigerant were phased out in 2004?
R-12
R-134a
R-11
R-22
8: How many groups of refrigerants are there?
3
7
1
5
9: How many refrigerant classifications are there for toxicity?
3
1
2
5
10: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into
the low-pressure side of the system
the high side of the system
the liquid receiver
both a and c are correct
11: 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.
“UM” and “UV”
“UL”
“U” or “UM”
“UV”
12: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of
the aggregate of the high side and low side
2.5 times the design pressure
the high side
the low side
13: Refrigeration piping before being buried shall be
leak tested
encased in pipe duct
pressure tested
All of the above
14: A High-Probability System
is a system highly likely to leak form a failed connection or component of such 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 will enter an unoccupied space
is such that any leak will cause injury or death to anyone within a 100 square foot area
15: What is an egress?
An escape route
A code violation
An entrance or exit
A valve put on the low side of the system to prevent frosting
16: Methyl Chloride is a halogenated refrigerant and should not come in contact with
aluminum
zinc
magnesium
all of the above
17: The main purpose of a refrigerant detector in a machinery room is to
inform there is a refrigerant leak int he system
detect toxins in the air caused by a refrigerant leak
to set off an alarm when there is refrigerant present inside the room
all of the above
18: 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)
institutional occupancy
commercial occupancy
public assembly occupancy
illegal occupancy
19: Liquid level gauges must be provided with what?
A relief valve
A low level mark
Automatic shut-offs
A red line
20: How far from the ground does a relief valve need to be?
At least 15' above grade
At least 20' above grade
Not more than 3' above grade
At least 25' above grade
21: Which refrigerant(s) is an HFC?
R-22
R-410A
R-502
All of the above
22: Which of the following are considered inorganic refrigerants?
R-717 and R-718
410A and R-407C
R-500 and R-502
None of the above
23: What must be done to refrigerant pipes before being buried ?(8.10.4)
Leak checked
Certified
Classifed
Insulated and installed in a pipe duct (Encased)
24: How many gallons of water do you need per pound of ammonia?
100
1
10
50
25: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a