Topics: ASHRAE/CMR
1: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
2: Pressure relief valves shall be marked with the data from
- Section XIII Division of the ASME Boiler & Pressure Code
- Section IV Division of the ASME Boiler & Pressure Code
- Section VIII Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code
3: Ammonia is under what safety classification?
- B2
- B1
- B3
- A3
4: 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.
5: What is the minimum height refrigeration piping should be placed against walls?
- 6'
- 7.25'
- Ceiling height
- 72"
6: 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
7: When is the only time you can leave a service container attached to a system?
- Leaking system
- Recovery
- Charging
- Both b and c
8: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 18
- 24
- 15
- 10
9: What pipe can not be used for refrigeration?
- L
- K
- M
- N
10: Where must a refrigeration contractor's license number be displayed?
- Truck, office, every job, and on all equipment
- Uniforms, checks, and invoices.
- Trucks, license plates, and uniforms
- Trucks, invoices, and advertising
11: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of
- the ASME Boiler and Pressure Vessel Code
- Section 11.3.1.5 ASHRAE 15 Standard
- the ANSI Standard 10.7.2
- both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5
12: What section of ASHRAE-15 governs pressure vessels?
- Section 7 ASHRAE-15 ASME VIII fired
- OSHA
- Section 9 ASHRAE-15 ASME VIII unfired
- Section 6 ASHRAE-34 ASME VIII unfired
13: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.
- ammonia
- HCFC-123
- Lithium bromide
- CFC-11
14: How far from the window does a relief valve need to be according to ASHRAE-15?
- There is no minimum for relief valve and windows.
- At least 20'
- At least 40'
- At least 30'
15: Indirect systems using Group II refrigerants
- shall be used in refrigeration system less than 1,000 lbs
- shall be used in refrigeration system in excess of 1,000 lbs
- shall have all refrigerant containing parts except piping, installed in a Class T machine room
- shall be used for mechanical equipment only
16: What must be done if refrigeration lines pass through a concrete floor?
- leak checked
- insulated
- moisture barrier
- installed through a pipe casing
17: What must be done to refrigerant pipes before being buried?
- Certified
- Leaked checked
- Encased
- Coated
18: Systems containing more than 110 pounds must have stop valves located at the
- compressor suction inlet
- compressor discharge outlet
- receiver inlet and outlet
- All of the above
19: What type of pressure relief device is used on a CO2 system?
- Gate valve
- Fusible plug
- Glove valve
- Rupture disk
20: What is the refrigerant chlorodifluoromethane?
- R-134a
- R-123
- R-22
- R-12
21: What type of material can't be used on the outlet of a relief valve?
- PVC
- Magnesium alloy
- Stainless steel
- Copper
22: A class B2 refrigerant is considered
- toxic and somewhat flammable
- non-toxic and highly flammable
- toxic and non-flammable
- non-toxic and non-flammable
23: R-410A is classified as a ____ refrigerant on the safety matrix.
- B-1
- A-1
- B-2
- A-2
24: What must be done to all doors and access points in duct work going through a mechanical room?
- Must be hindged
- Must be screwed shut
- Must be sealed and gasketed
- All of the above
25: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- Nothing must be done
- you can never change refrigerants
- Place sign, check for leaks, and insulate suction line
- Make sure its compatible, notify owner, and notify AHJ.