Topics: All categories in the pool
1: When should a relief valve start to function?
- Before the purge station discharges
- Two times it's working pressure
- At it's set pressure
- 10 psi before it's set pressure
2: Which is considered the more efficient condenser?
- fan cooled
- water cooled
- spray cooled
- air cooled
3: No open flames are allowed in the machinery room unless?
- Never can be allowed
- Only when combustion air is provided from outside of the machinery room
- Approved by the installing contractor
- Approved by the authorized person
4: What is the purpose of a surge capacitor on a contactor?
- to provide smoother start/stops
- to protect low voltage equipment
- to balance the sine waves
- to keep the contactor pulled in
5: Defined process piping by code CMR (528)
- Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
- Any piping in an industrial space
- Any piping in an industrial or commercial space
- All of the above
6: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
- 44 lbs
- 13.9 lbs
- 22 lbs
- 6.6 lbs
7: By using nitrogen within a pipe during brazing operation,
- Discoloration is prevented
- Exterior scale formation is minimized
- The explosion hazard is confined
- Copper oxide formation is prevented
8: In a motor, an internal overload might open if
- there was a high pressure refrigerant was used for a low pressure system.
- there's a direct short
- there's an open start winding
- there's an excess current draw through the motor
9: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant
- shall be inspected by the Boiler of Inspectors bi-annually
- does not require a pressure-limiting device
- shall have a pressure limiting device installed on the high side of the system
- shall have a pressure limiting device and a pressure relief valve installed
10: The high side float assembly meters refrigerant into the evaporator through the
- upper chamber of the high side
- upper chamber of the low side
- lower chamber of the low side
- lower chamber of the high side
11: Low pressure chiller systems use what type of compressor?
- Screw
- Centrifugal
- Reciprocating
- Scroll
12: Start to Run windings will have what resistance?
- Somewhere between the actual start winding and run winding resistance value
- The least resistance value
- The most resistance value
- All will be at equal values
13: What must be done to all doors and access points in duct work going through a mechanical room?
- Must be hindged
- Must be screwed shut
- Must be sealed and gasketed
- All of the above
14: What chemical in the refrigerant set off the leak detection alarm?
- Fluorine
- Chlorine
- Both A and B
- none of the above
15: When an inspection is needed, how often must it be done?
- every 24 months
- annually
- every 18 months
- every 36 months
16: What would be the classification for Stop & Shop grocery store?
- Place of assembly
- Large mercantile
- Industrial
- Instituional
17: With a 5/8" X 5/8" x 3/4" tee, what size is the center connection?
- 5/8"
- 3/4"
- 3/8"
- 1/2"
18: Humidity can be sensed with
- pressure bellows
- bimetal
- human hair
- thermometer
19: Which refrigerant class listed below is the most flammable?
- C3
- B2
- A3
- A2
20: How much refrigerant can be stored in a mechanical room outside of the system?
- 150
- 100
- 330
- 200
21: Refrigeration piping before being buried shall be
- leak tested
- encased in pipe duct
- pressure tested
- All of the above
22: What is the minimum height refrigeration piping should be placed against walls?
- 7.25'
- 6'
- 72"
- Ceiling height
23: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
- 22
- 18
- 50
- 33
24: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.
- 10
- 20
- 15
- 25
25: The absorber shell contains the
- condenser and the generator
- condenser, the evaporator, and the generator
- condenser and the absorber
- evaporator and the absorber