Topics: All categories in the pool
1: Dual-pressure relief devices should be installed on
- vessels of 10 cubic feet or less
- vessels of 10 cubic feet or more
- vessels of 3 cubic feet or less
- vessels of 3 cubic feet or more
2: In designing duct work, pressure and ______ need to be considered
- length
- CFM
- duct sealant used
- all of the above
3: The oil separator is always inserted in the system
- to prevent oil logging
- where it can be easily serviced
- in the discharge line
- in a cool spot
4: Doors communicating with outside from a mechanical room must be?
- Self-closing, aligned, fire door
- Steel, approved, weather-stripped
- Self-closing, approved, fire door
- Self-closing, wooden, fire door
5: What is absolute humidity?
- the amount of moisture in the air per one pound of 50% RH air
- the amount of moisture in the air in grains of cubic feet of volume
- the amount of moisture in the air in grains of square feet of volume
- none of the above
6: What is a megaohm meter?
- An electric meter used by electricians to test large 3-phase blower motors for the correct rotation
- An electric meter that measures very high resistance values by sending a high DC voltage signal into the object being tested
- An electric meter that measures very high resistance values by sending a low voltage AC signal into the object being tested
- Is an electric meter that measures extremely low resistance valves by sending high DC voltage signal into the object being tested.
7: The leaving chilled water set point for comfort cooling is typically?
- 45
- 38
- 60
- 66
8: A relief valve shall be located at least ___ above grade.
- 10'
- 25'
- 36'
- 15'
9: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of
- the ASME Boiler and Pressure Vessel Code
- Section 11.3.1.5 ASHRAE 15 Standard
- the ANSI Standard 10.7.2
- both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5
10: What is an example of institutional occupancy?
- Hospital
- Football stadium
- Dorms
- Shopping mall
11: Pi equals approximately
- 3.41
- 746
- 3.14
- 12,000
12: Who approves containers for refrigerants?
- D.O.D
- E.P.A
- D.O.E
- D.O.T
13: The Department that certifies the transportation of refrigerant is the
- RSES
- DOT
- EPA
- EPO
14: No open flames are allowed in the machinery room unless?
- Approved by the authorized person
- Only when combustion air is provided from outside of the machinery room
- Never can be allowed
- Approved by the installing contractor
15: What must be done if refrigeration lines pass through a concrete floor?
- installed through a pipe casing
- insulated
- moisture barrier
- leak checked
16: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
- shall use rupture discs or duel pressure relief valves
- shall use pressure relief devices
17: When a refrigerating machinery room is used, the emergency procedures shall be posted
- outside the room, immediately adjacent to each door
- inside the room, immediately adjacent to each door
- on a conspicuous card located near the compressor
- on a conspicuous card located near the evaporator
18: A multi-evaporator refrigeration system uses what type of valve to maintain evaporating temperatures?
- EPR valve
- Solenoid valve
- CPR valve
- EEV
19: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.
- 550
- 100
- 350
- 50
20: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
21: The best way to determine the voltage requirement for an electrical component is to
- read the voltage with a mulitmeter
- read the nameplate data
- determine the capacity of the service panel
- check with the utility company
22: What pipe can not be used for refrigeration?
- M
- K
- L
- N
23: Volts x amps equals
- Impedance
- Watts
- Ohms Law
- Inductance
24: A relief valve discharge capacity is rated in
- PSIA
- PSIG
- temperature minus pounds of air per second divided by release rate squared
- Pounds of air per minute.
25: Capacity control on a centrifugal compressor is accomplished by the
- slide vanes
- pre-rotational guide vanes
- post-rotational guide vanes
- check valves