Topics: ASHRAE/CMR
1: How many different groups of refrigerants are there?
- 11
- 7
- 15
- 3
2: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.
- 75
- 15
- 50
- 55
3: How many CFMs are required per square foot of commercial office occupied space
- .5 CFM
- 15 CFM
- 20 CFM
- 5 CFM
4: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
5: A relief valve shall be located at least ___ above grade.
- 36'
- 25'
- 15'
- 10'
6: Ammonia (NH3) is a group III refrigerant
- True
- False
7: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
- rupture plug
- fusion plug
- relief plug
- fusible plug
8: Relief valves are rated in
- gallons of water per hour
- pounds of air per hour
- gallons of water per minute
- pounds of air per minute
9: A class B2 refrigerant is considered
- toxic and somewhat flammable
- non-toxic and non-flammable
- non-toxic and highly flammable
- toxic and non-flammable
10: When a refrigeration or air conditioning system is installed
- a field inspection shall be made before it is put into service
- it shall be approved by the owner for proper operation.
- the form of certificate shall be authorized by the Department of Pubic safety
- it shall not be operated below prescribed pressures
11: There can be no airflow from an occupied space through a machine room unless what?
- System is high velocity
- System is ducted and sealed
- Duct is not located in the ceiling
- None of the above.
12: 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.
- CFC-11
- ammonia
- Lithium bromide
- HCFC-123
13: 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
14: Single compound Refrigerants are classified by what two criteria?
- Flammability and temperature range
- Temperature range and hazardousness
- Weight and color
- Flammability and toxicity
15: System design pressures must take into consideration, not only, pressures found during normal operation but also what?
- When it's cold out
- When there is a malfunction on the high side
- When its warm out
- All of the above
16: Doors communicating with outside from a mechanical room must be?
- Self-closing, aligned, fire door
- Self-closing, approved, fire door
- Steel, approved, weather-stripped
- Self-closing, wooden, fire door
17: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- you can never change refrigerants
- Nothing must be done
- Place sign, check for leaks, and insulate suction line
- Make sure its compatible, notify owner, and notify AHJ.
18: Large mercantile occupancy is
- a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
- a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
- a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
- a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
19: The main cause of enacting the "no vending rule" of July 1st 1992 was
- global warming potential
- ozone depletion
- both a & b
- None of the above
20: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into
- the low-pressure side of the system
- the high side of the system
- the liquid receiver
- both a and c are correct
21: What is not a requirement of a class T machine room?
- fire hose connection to the building fire protection system
- tight fitting doors
- self-closing doors
- automatic ventilation
22: R-123 belongs to Group
- B-3
- B-1
- A-3
- B-2
23: Setting a pressure relief device shall not exceed ___ of the design pressure
- 80%
- 75%
- 90%
- 100%
24: A positive displacement compressor is
- a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
- is a reciprocating type compressor with 2 or more pistons
- where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
- a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
25: Pressure relief valves shall be marked with the data from
- Section IV Division of the ASME Boiler & Pressure Code
- Section VIII Division of the ASME Boiler & Pressure Code
- Section XIII Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code