Topics: ASHRAE/CMR
1: What is a Category "D" fluid?
- Any fluid that exceeds 150 psig and has design temperature of over 366F
- A typical refrigerant used on newer air conditioning and heat pump ssytems
- A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
- A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
2: What kind of material can't be used on the outlet of a relief valve?
- Stainless Steel
- PVC
- Aluminum
- Copper
3: A High-Probability System
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is such that a leak of refrigerant from a failed connection will enter the occupied space
- is a system highly likely to leak form a failed connection or component of such system
- is such that a leak of refrigerant from a failed connection will enter an unoccupied space
4: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
- the owner shall be informed
- explosion precautions must be taken
- no flames shall be permitted
- gas masks must be worn
5: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.
- 400
- 350
- 100
- 250
6: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
- Muffler
- Moisture indicator
- Foot valve
- Stop valve
7: A restaurant is classified as a
- public assembly occupancy
- commercial occupancy
- large mercantile occupancy
- mixed occupancy
8: 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
9: A hotel is considered a _______ occupancy.
- commercial
- residential
- institutional
- mercantile
10: Which refrigerant class listed below is the most flammable?
- A2
- B2
- C3
- A3
11: The Department that certifies the transportation of refrigerant is the
- RSES
- EPO
- DOT
- EPA
12: Pressure relief valves shall be marked with the data from
- Section VIII Division of the ASME Boiler & Pressure Code
- Section IV Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code
- Section XIII Division of the ASME Boiler & Pressure Code
13: Liquid level gauges must be provided with what?
- A low level mark
- A red line
- A relief valve
- Automatic shut-offs
14: R-123 belongs to Group
- B-2
- B-3
- A-3
- B-1
15: Which occupancy can ammonia be used in?
- redifential
- commercial
- industrial
- depends on the quantity of freon
16: How many gallons of water do you need per pound of ammonia?
- 1
- 100
- 50
- 10
17: A pressure relief should be located at least _______ from windows and doors.
- 15'
- 20'
- 30'
- 25'
18: 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
19: How far from the ground does a relief valve need to be?
- Not more than 3' above grade
- At least 20' above grade
- At least 15' above grade
- At least 25' above grade
20: The discharge relief valve is located (9.4.6)
- on top of the condensor
- between the compressor and reciever
- between the compressor and oil separator
- between the compressor and the stop valve
21: A positive displacement compressor is
- 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
- 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
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: Evaporators within 18" of a heating coil must be equipped with a
- low limit control
- zone valve
- pressure relief device
- high limit control
24: A movie theater would be considered a
- commercial occupancy
- public assembly occupancy
- mixed occupancy
- institutional occupancy
25: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
- place sign, check for leaks, insulate
- make sure it's compatible, notify owner, notify A.H.J
- you can't change refrigerants
- nothing must be done