Topics: ASHRAE/CMR
1: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Classifed
- Certified
- Leak checked
- Insulated and installed in a pipe duct (Encased)
2: Defined process piping by code CMR (528)
- Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
- Any piping in an industrial space
- Any piping in an industrial or commercial space
- All of the above
3: Machinery rooms must be vented to ______?
- neutralizing tank
- unoccupied spaces
- basement
- outdoors
4: The Department that certifies the transportation of refrigerant is the
- DOT
- EPA
- EPO
- RSES
5: Doors communicating with outside from a mechanical room must be?
- Self-closing, approved, fire door
- Steel, approved, weather-stripped
- Self-closing, wooden, fire door
- Self-closing, aligned, fire door
6: 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.
- 100
- 90
- 80
- 110
7: When a refrigeration or air conditioning system is installed
- it shall not be operated below prescribed pressures
- the form of certificate shall be authorized by the Department of Pubic safety
- it shall be approved by the owner for proper operation.
- a field inspection shall be made before it is put into service
8: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 1000F
- 800F
- 600F
- 700F
9: The color code of a tank of ammonia is
- silver
- white
- light green
- lavender
10: Can ammonia be used on domestic system?
- yes
- yes, for systems under 10 tons
- no
- no, unless there is proper ventilation system installed
11: 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
12: _____ and its alloys are suitable for use with ammonia systems.
- Magnesium
- Zinc
- Aluminum
- Copper
13: The discharge relief valve is located (9.4.6)
- on top of the condensor
- between the compressor and the stop valve
- between the compressor and oil separator
- between the compressor and reciever
14: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- Place sign, check for leaks, and insulate suction line
- you can never change refrigerants
- Make sure its compatible, notify owner, and notify AHJ.
- Nothing must be done
15: What section governs pressure vessels?
- OSHA
- Section 1 ASHREA 15 ASME fired
- Section 8 ASHREA 15 ASME unfired
- Section ASHREA 34
16: Where must a refrigeration contractor's license number be displayed?
- Trucks, invoices, and advertising
- Truck, office, every job, and on all equipment
- Trucks, license plates, and uniforms
- Uniforms, checks, and invoices.
17: 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 low side
- 2.5 times the design pressure
- the aggregate of the high side and low side
- the high side
18: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
- 2.0
- 3.0
- 2.5
- 5.5
19: A relief valve discharge capacity is rated in
- PSIG
- PSIA
- temperature minus pounds of air per second divided by release rate squared
- Pounds of air per minute.
20: What type of copper is not permitted on refrigeration systems?
- Type M
- Type N
- Type L
- Type K
21: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- critical pressure
- high pressure
- low pressure
- design pressure
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: 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
- commercial occupancy
- institutional occupancy
- public assembly occupancy
24: 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
25: What refrigerant has zero ozone depletion
- HFC
- CFC
- HCFC
- None of the above