Topics: ASHRAE/CMR
1: Where must a refrigeration contractor's license number be displayed?
- Uniforms, checks, and invoices.
- Trucks, license plates, and uniforms
- Truck, office, every job, and on all equipment
- Trucks, invoices, and advertising
2: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
- the mechanical room housing the refrigeration system
- the outdoors
- Machinery rooms need not be vented
- the return air ducted system
3: A Low-Probability System
- 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 the occupied space
- is such that a leak of refrigerant from a failed connection can not enter the occupied space
- is such that any leak will cause injury or death to anyone within a 100 square foot area
4: What would be the classification of a prison?
- Industrial
- Place of assembly
- Institutional
- Large mercantile
5: Single compound Refrigerants are classified by what two criteria?
- Temperature range and hazardousness
- Flammability and temperature range
- Flammability and toxicity
- Weight and color
6: Institutional occupancy is
- a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
- a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
- a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
- None of the above
7: Which refrigerant replaced R-12?
- R-410A
- R-134A
- R-22
- R-407A
8: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)
- Pressure gauge
- Temperature gauge
- Sight glass gauge
- All of the above
9: What must be done if refrigeration lines pass through a concrete floor?
- moisture barrier
- leak checked
- installed through a pipe casing
- insulated
10: A positive displacement compressor is
- a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
- 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 pressure of the compression chamber
- is a reciprocating type compressor with 2 or more pistons
11: Class 3 refrigerants are
- toxic
- highly flammable
- non-flammable
- non-toxic
12: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- Circuit Breaker
- T&P device
- Temperature limiter device
- Relief valve
13: What is an example of institutional occupancy?
- Shopping mall
- Hospital
- Football stadium
- Dorms
14: Evaporators within 18" of a heating coil must be equipped with a
- zone valve
- high limit control
- pressure relief device
- low limit control
15: Stop valves shall not be permitted between the system and the
- condenser
- service valve
- bleed valve
- relief valve
16: Machinery rooms must be vented to ______?
- outdoors
- unoccupied spaces
- neutralizing tank
- basement
17: A 3-cubic foot receiver must have what type of relief valve?
- fusible plug
- relief valve
- rupture device
- none of the above
18: What type of pressure relief device is used on a CO2 system?
- Gate valve
- Fusible plug
- Rupture disk
- Glove valve
19: What does safe access mean?
- OSHA approved
- Well-lit exit signs
- Locked doors
- A clear unobstructed path to the equipment and controls
20: Liquid level gauges must be provided with what?
- A low level mark
- A relief valve
- A red line
- Automatic shut-offs
21: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.
- True
- False
22: What is Trichlorotrifluoromethane?
- R-11
- R-13
- R-113
- R-12
23: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
- there is no Group B1 refrigerants
- lower
- the same
- higher
24: How far from the ground does a relief valve need to be?
- At least 20' above grade
- At least 25' above grade
- At least 15' above grade
- Not more than 3' above grade
25: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.
- 3.0, 3.5
- 2.5, 2.5
- 2.5, 3.0
- 6.6, 6.6