Topics: All categories in the pool
1: Mercury was used in thermometers primarily because it
- was inexpensive
- vaporizes at very high temperatures
- expands uniformly
- never freezes
2: How many BTU's is produced by one watt of energy
- 3.41
- 2.57
- 1
- 3.00
3: 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 25' above grade
- At least 15' above grade
4: Pi equals approximately
- 3.41
- 3.14
- 12,000
- 746
5: What refrigerant were phased out in 2004?
- R-134a
- R-11
- R-12
- R-22
6: Liquid refrigerant R-22 enters an evaporator at 50.2 psig, 20F and leaves 37F, its pressure as it leaves will be
- 70.8 psig
- 50.2 psig
- 66.1 psig
- 43.3 psig
7: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 15
- 18
- 24
- 10
8: What is a high-side float?
- An electronic-type metering device that contains a float assembly within the device which can accurately meter refrigerant into the evaporator as the load varies
- Located in the liquid line entering the evaporator, is a float-type metering device that rises to reduce refrigerant flow when the liquid refrigerant level rises in the high side of the chiller
- Located in the liquid line entering the evaporator, so when the refrigerant level is higher in the liquid line than the evaporator, the float rises to allow more refrigerant flow into the evaporator
- Located in the evaporator, is a float-type metering device that rises to reduce refrigerant flow when the liquid refrigerant level rises in the low side of the chiller
9: 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 authorized person
- Approved by the installing contractor
10: Transformers are rated in
- volt-amps
- volts
- volts-ohms
- amps
11: Pressure is equivalent of
- Force
- Force / Area
- Area X Force
- Force X Area
12: A self contained system
- is a complete factory made and tested system
- is any system or part of a system used to increase evaporation by expansion or vaporization
- is a unit system Group I refrigerants only
- is a unit system Group II refrigerants only
13: The leaving chilled water set point for comfort cooling is typically?
- 38
- 66
- 45
- 60
14: Which has more turns in the windings: Start windings or Run windings?
- Start windings
- Run windings
- They both have the exact same turns
- Depends on the system and capacitor used
15: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
- containing R-11, R-123 & R-717 exclusively shall not be prohibited
- of Group B2 refrigerant shall be prohibited
- shall be prohibited
- shall not be prohibited
16: The best way to determine the voltage requirement for an electrical component is to
- determine the capacity of the service panel
- read the voltage with a mulitmeter
- read the nameplate data
- check with the utility company
17: What would be the classification of a prison?
- Institutional
- Place of assembly
- Large mercantile
- Industrial
18: Heat is a form of
- matter
- work
- energy
- power
19: Evaporators within 18" of a heating coil must be equipped with a
- pressure relief device
- high limit control
- low limit control
- zone valve
20: A professional or office building would be considered what type of occupancy?
- mercantile
- business
- public assembly
- commercial
21: Which refrigerant class listed below is the most flammable?
- A2
- C3
- A3
- B2
22: Copper and its alloys shall not be used with ammonia
- True
- False
23: A chiller entering and leaving temperature difference is?
- 10 degrees F
- 50 degrees F
- 5 degrees F
- 20 degrees F
24: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
- bi-annually
- regularly
- quarterly
- annually
25: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.
- 75
- 50
- 20
- 15