Topics: ASHRAE/CMR
1: Where a refrigeration or air conditioning system is installed,
- the form or certificate shall be authorized by the Department of Public Safety
- The company who installed the system must notify the fire department in the jurisdiction where installed
- it shall not be operated below prescribed pressuers
- A field inspection shall be made before it is put into service
2: 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)
- institutional occupancy
- commercial occupancy
- illegal occupancy
- public assembly occupancy
3: Class A refrigerants are considered
- non-flammable
- toxic
- non-toxic
- flammable
4: Liquid level gauges must be provided with what?
- Automatic shut-offs
- A relief valve
- A low level mark
- A red line
5: A positive displacement compressor is
- where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
- is a reciprocating type compressor with 2 or more pistons
- a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
- a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
6: A pressure relief should be located at least _______ from windows and doors.
- 25'
- 15'
- 30'
- 20'
7: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
8: How much refrigerant can be stored in a mechanical room outside of the system?
- 330
- 200
- 150
- 100
9: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 22 lbs
- 13.9 lbs
- 6.6 lbs
- 44 lbs
10: Doors communicating with outside from a mechanical room must be?
- Self-closing, wooden, fire door
- Self-closing, aligned, fire door
- Self-closing, approved, fire door
- Steel, approved, weather-stripped
11: What would be the classification of a prison?
- Large mercantile
- Industrial
- Place of assembly
- Institutional
12: A relief valve discharge capacity is rated in
- temperature minus pounds of air per second divided by release rate squared
- PSIG
- Pounds of air per minute.
- PSIA
13: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- UL and UM
- UM or UL
- UV or UR
- UL and UR
14: What refrigerant doesn't have to be classifted?
- R-718
- R-717
- R-134a
- R-711
15: Pressure vessels of 10 cubic feet or more gross volume shall use
- at least one rupture member
- a dual pressure-relief valve if charging into the atmosphere
- at least three means of discharge and/or rupture discs
- both a and b are correct
16: High pressure controls should be set no higher than
- 25% of set point
- 80% of set point
- 10% of set point
- 90% of set point
17: 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
18: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 50
- 25
- 66
- 22
19: 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
- Nothing must be done
- you can never change refrigerants
- Make sure its compatible, notify owner, and notify AHJ.
20: How many groups of refrigerants are there?
- 5
- 7
- 1
- 3
21: 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
- the aggregate of the high side and low side
- the high side
- 2.5 times the design pressure
22: How are refrigerant blends classified?
- Blends don't have to be classified
- Based on best case Fractionation
- Based on worst case fractionation
- Based on the oil used
23: How many gallons of water per pound of ammonia do you need?
- 5
- 1
- 15
- 20
24: Stop valves shall not be permitted between the system and the
- bleed valve
- relief valve
- condenser
- service valve
25: What is an example of institutional occupancy?
- Hospital
- Shopping mall
- Football stadium
- Dorms