Topics: ASHRAE/CMR
1: Ammonia can come in contact with _______ ?
- Copper tubing
- Copper
- Aluminum
- Brass
2: How many refrigerant classifications are there for toxicity?
- 1
- 5
- 2
- 3
3: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 24
- 18
- 15
- 10
4: 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
5: The Department that certifies the transportation of refrigerant is the
- EPA
- EPO
- DOT
- RSES
6: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
- 1.2
- 2.2
- 1
- 1.5
7: High pressure controls should be set no higher than
- 90% of set point
- 10% of set point
- 80% of set point
- 25% of set point
8: Direct systems using Group II refrigerants
- shall be allowed to be used for human comfort.
- shall be installed per instruction of the AHJ
- shall be installed in Class T machinery rooms
- shall not be used for air condition for human comfort
9: Whoever owns/uses a refrigeration or air conditioning system covered by this code
- must notify the Department of Public Safety prior to starting the system
- shall be licensed by the Commonwealth of Massachusetts according to CMR 522
- shall make application for inspections to the Chief of Inspectors
- None of the above
10: Refrigeration piping before being buried shall be
- leak tested
- encased in pipe duct
- pressure tested
- All of the above
11: Pressure vessels having an inside diameter of 6” or less shall be protected by
- a fusible plug
- 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
- a pressure relief device
12: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
13: Name three things that must be done when changing refrigeration lubricant?
- You can't change lubricants.
- Make sure it's compatible, notify owner, notify AHJ
- Nothing must be done
- Place sign, check for leaks, insulate
14: 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
- 550
- 100
- 350
15: R-11 belongs to Group
- A-2
- A-1
- B-1
- B-3
16: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
- 80%
- 90%
- 75%
- 100%
17: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
- refrigerant sensing
- CO Sensing
- A group sensing
- phosgene gas sening
18: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
- Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
- over pressure protection as well as a temperature protection device
- over pressure protection
- over pressure protection and a rupture disc
19: Trichlorofluoromethane is the name of what refrigerant?
- R-502
- R-11
- R-113
- R-12
20: Halo-carbon refrigerants cannot be used with what material?
- Aluminum
- Magnesium alloy
- Copper
- Stainless Steel
21: What must be done to refrigerant pipes before being buried?
- Leaked checked
- Certified
- Coated
- Encased
22: A machine room with a refrigerant system using ammonia shall
- be provided with a continuously operated ventilation system
- be considered a non-hazardous location in accordance with National Electrical code
- have no flame producing apparatus permanently installed and operated
- All of the above
23: When should a relief valve start to function?
- Before the purge station discharges
- Two times it's working pressure
- At it's set pressure
- 10 psi before it's set pressure
24: What type refrigerant is NOT ozone depleting?
- CFC
- HFC
- HCFC
- Halon
25: What refrigerant were phased out in 2004?
- R-22
- R-134a
- R-11
- R-12