Topics: ASHRAE/CMR
1: The Department that certifies the transportation of refrigerant is the
- RSES
- EPO
- DOT
- EPA
2: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
- do not need pressure relief protection
3: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.
- 110
- 100
- 90
- 80
4: Setting a pressure relief device shall not exceed ___ of the design pressure
- 75%
- 80%
- 100%
- 90%
5: What must be done if refrigeration lines pass through a concrete floor?
- installed through a pipe casing
- moisture barrier
- insulated
- leak checked
6: What must be done to refrigerant pipes before being buried?
- Coated
- Leaked checked
- Certified
- Encased
7: What type of relief valve is used on a CO2 system?
- gate valve
- rupture disc
- fusible plug
- glove disc
8: Which occupancy can ammonia be used in?
- redifential
- industrial
- depends on the quantity of freon
- commercial
9: No open flames are allowed in the machinery room unless?
- Approved by the authorized person
- Never can be allowed
- Only when combustion air is provided from outside of the machinery room
- Approved by the installing contractor
10: Machinery rooms must be vented to ______?
- basement
- outdoors
- neutralizing tank
- unoccupied spaces
11: 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
- the liquid side of the system
- low side of the system
- high side of the system
12: 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)
- illegal occupancy
- institutional occupancy
- public assembly occupancy
- commercial occupancy
13: What type of relief valve is used on low pressure centrifugal compressor systems?
- Spring-loaded relief valve
- Rupture disc
- Purge relief
- None of the above
14: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
15: Which of the following is an inorganic refrigerant?
- R-22
- Ammonia
- Chlorofluorocarbons
- All of the above
16: 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”
17: A declaration test is needed when the system contains more than
- 120 lbs
- 110 lbs
- 55 lbs
- 65 lbs
18: 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 welder
- competent welder
- licensed technician
- welder qualified
19: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 5
- 1
- 3
- 2
20: 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
21: How many CFMs are required per square foot of commercial office occupied space
- 15 CFM
- 5 CFM
- .5 CFM
- 20 CFM
22: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Certified
- Classifed
- Leak checked
- Insulated and installed in a pipe duct (Encased)
23: What refrigerant doesn't have to be classified?
- R-422A
- R-718
- R-717
- R-134A
24: Large mercantile occupancy is
- a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
- a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
- a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
25: A High-Probablity system
- 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
- is such that a leak of refrigerant from failed connections will enter the occupied space