Topics: ASHRAE/CMR
1: Setting a pressure relief device shall not exceed ___ of the design pressure
- 100%
- 75%
- 80%
- 90%
2: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)
- Pressure gauge
- Temperature gauge
- Sight glass gauge
- All of the above
3: Where a refrigeration or air conditioning system is installed,
- The company who installed the system must notify the fire department in the jurisdiction where installed
- it shall not be operated below prescribed pressuers
- A field inspection shall be made before it is put into service
- the form or certificate shall be authorized by the Department of Public Safety
4: Pressure relief valves shall be marked with the data from
- Section IV Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code
- Section XIII Division of the ASME Boiler & Pressure Code
- Section VIII Division of the ASME Boiler & Pressure Code
5: Which refrigerant class listed below is the most flammable?
- A3
- B2
- A2
- C3
6: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.
- 75
- 20
- 15
- 50
7: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
- 99%
- 75%
- 90%
- 80%
8: 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
9: How many refrigerant classifications are there for toxicity?
- 3
- 2
- 1
- 5
10: The discharge relief valve is located (9.4.6)
- between the compressor and the stop valve
- between the compressor and oil separator
- on top of the condensor
- between the compressor and reciever
11: What is an egress?
- A code violation
- A valve put on the low side of the system to prevent frosting
- An escape route
- An entrance or exit
12: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Classifed
- Leak checked
- Certified
- Insulated and installed in a pipe duct (Encased)
13: Pressure vessels having an inside diameter of 6” or less shall be protected by
- a fusible plug
- a pressure relief device
- either a fusible plug or a pressure relief device
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
14: A relief valve shall be located at least ___ above grade.
- 36'
- 15'
- 10'
- 25'
15: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 600F
- 800F
- 1000F
- 700F
16: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
17: 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)
- public assembly occupancy
- illegal occupancy
- commercial occupancy
- institutional occupancy
18: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- relief plug
- fusible plug
- rupture plug
- fusion plug
19: A pressure relief should be located at least _______ from windows and doors.
- 20'
- 15'
- 30'
- 25'
20: What is a Category "M" fluid?
- A typical refrigerant used on newer air conditioning and heat pump systems
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and the designed temperature is between -20F to 366F
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
- Any fluid that exceeds 150 psig and has design temperatures over 366F
21: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UL and UM
- UM or UL
- UV or UR
- UL and UR
22: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 13.9 lbs
- 6.6 lbs
- 22 lbs
- 44 lbs
23: Where are the three places that the discharge from an ammonia relief valve be piped?
- To chemical neutralizing tank only
- Underground, into drain, into mechanical room
- Atmosphere, Tank containing water, where the AHJ indicates.
- None of the above.
24: All machine rooms must be outfitted with a detector that _______?
- activates an audible alarm
- activates a visual alarm
- starts the ventilation system
- All of the above
25: What type of material can't be used on the outlet of a relief valve?
- Stainless steel
- Magnesium alloy
- PVC
- Copper