Topics: All categories in the pool
1: one BTU equals
- 12,000 hp
- 31.4 hp
- Pi
- 3.41 hp
2: What's the purpose of a megohmmeter?
- To measure low to very low resistance values
- To alternate the current in a DC circuit in order to calculate the total impedance of a circuit
- To measure very high resistances
- None of the above
3: The amount of heat required to raise the temperature of 1 lb of water 1F is?
- 1 Therm
- 1 Kelvin
- The rate of conduction
- 1 BTU
4: Halo-carbon refrigerants cannot be used with what material?
- Magnesium alloy
- Aluminum
- Copper
- Stainless Steel
5: High pressure controls should be set no higher than
- 25% of set point
- 80% of set point
- 90% of set point
- 10% of set point
6: A rule of thumb in air conditioning is ____ CFM per ton?
- 100
- 500
- 400
- 600
7: 746 watts is equal to
- 10 hp
- Pi
- 100 hp
- 1 hp
8: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
- 2
- 1
- 5
- 3
9: The formula for Pure Power in a resistance circuit is
- Kw = volts X amps
- Watts = volts X amps
- Watts X power factor
- Watts X amps.
10: Where is the high-side float located on a chiller system?
- discharge line
- flash line
- inside the chiller barrel
- liquid line
11: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into
- the low-pressure side of the system
- the high side of the system
- the liquid receiver
- both a and c are correct
12: Instead of using a compressor, an absorption air-conditioning chiller uses which of the following as its driving force?
- Oil
- Electricity
- Heat
- Air
13: A 120 volt motor rated at 1,800 watts. You find the motor is drawings 25 amps. The motor is
- drawing RLA and is running as it should
- drawing LRA and is seized and should be replaced.
- running hot
- none of the above
14: A relief valve discharge capacity is rated in
- temperature minus pounds of air per second divided by release rate squared
- Pounds of air per minute.
- PSIG
- PSIA
15: A High-Probablity system
- is such that any leak will cause injury or death to anyone within a 100 square foot area
- is a system highly likely to leak from a failed connection or component of such system
- is such that a leak of refrigerant from failed connections will enter the unoccupied space
- is such that a leak of refrigerant from failed connections will enter the occupied space
16: What is considered a cooling agent?
- any liquid used for the transmission of heat without condensation
- any liquid used for the transmission of heat without vaporization
- any liquid used for the transmission of heat when vaporization occurs
- any liquid used for the transmission of heat when condensation occur
17: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and
- gas masks must be worn
- explosion precautions must be taken
- no flames shall be permitted
- the owner shall be informed
18: Control systems can be classified by
- safety
- source of power
- tonnage of system
- economy of operation
19: Pressure vessels of 10 cubic feet or more gross volume shall use
- at least one rupture member
- a dual pressure-relief valve if charging into the atmosphere
- at least three means of discharge and/or rupture discs
- both a and b are correct
20: A normal operating evaporator temperature of R-22 for air conditioning is typically
- 55F
- 32F
- 58F
- 45F
21: If the spring is adjusted to increase the superheat, this new setting will
- have no effect on the frost line
- allow more liquid into the evaporator
- lengthen the frost line
- shorten the frost line
22: What does an anemometer measure?
- voltage
- amperage
- velocity
- temperature
23: The level of voltage caused by back electromagnetic force that opens the contacts of a potential relay in order to take the start capacitor out of the circuit is
- pick up voltage
- boost voltage
- lift voltage
- run voltage
24: A motor is rated for 120 volts and has a RLA (rated-load amps) of 5 amps. What is the wattage of the motor?
- 1000 watts
- 5KW
- 746 watts
- 600 watts
25: What kind of material can't be used on the outlet of a relief valve?
- Aluminum
- PVC
- Copper
- Stainless Steel