Topics: ASHRAE/CMR
1: What type refrigerant is NOT ozone depleting?
- HCFC
- CFC
- HFC
- Halon
2: What must be done to refrigerant pipes before being buried?
- Coated
- Leaked checked
- Encased
- Certified
3: 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.
- “UM” and “UV”
- “UV”
- “UL”
- “U” or “UM”
4: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 700F
- 800F
- 600F
- 1000F
5: How many gallons of water per pound of ammonia do you need?
- 5
- 20
- 1
- 15
6: How are refrigerant blends classified?
- Based on the oil used
- Based on worst case fractionation
- Based on best case Fractionation
- Blends don't have to be classified
7: Can ammonia be used on domestic system?
- no, unless there is proper ventilation system installed
- yes
- no
- yes, for systems under 10 tons
8: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
- 10,000
- 1,000
- 100,000
- 100
9: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?
- Flush with ammonia
- Flush with R-11
- Flush with R-718
- Flush with RX-11
10: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
- of Group B2 refrigerant shall be prohibited
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
- shall be prohibited
- shall not be prohibited
11: What section of ASHRAE-15 governs pressure vessels?
- Section 9 ASHRAE-15 ASME VIII unfired
- OSHA
- Section 6 ASHRAE-34 ASME VIII unfired
- Section 7 ASHRAE-15 ASME VIII fired
12: 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
13: How many flammability classifications are refrigerants in?
- 3
- 7
- 2
- 5
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 30'
- At least 40'
- At least 20'
15: Name an HCFC refrigerant(s):
- R-22
- R-123
- R-11
- both a & b
16: Who approves containers for refrigerants?
- D.O.D
- E.P.A
- D.O.E
- D.O.T
17: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
18: A class A3 refrigerant is considered
- toxic and somewhat flammable
- non-toxic and non-flammable
- non-toxic but highly flammable
- toxic and non-flammable
19: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
- gas masks must be worn
- explosion precautions must be taken
- no flames shall be permitted
- the owner shall be informed
20: How far from the ground does a relief valve need to be?
- At least 15' above grade
- At least 25' above grade
- At least 20' above grade
- Not more than 3' above grade
21: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the
- 24 volt secondary side of the Class 2 transformer to the thermostat
- breaker panel in
- first disconnect in
- load-side of the contactor in
22: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- Nothing must be done
- Make sure its compatible, notify owner, and notify AHJ.
- you can never change refrigerants
- Place sign, check for leaks, and insulate suction line
23: 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
24: What must be done if refrigeration lines pass through a concrete floor?
- installed through a pipe casing
- insulated
- leak checked
- moisture barrier
25: A restaurant is classified as a
- mixed occupancy
- large mercantile occupancy
- commercial occupancy
- public assembly occupancy