Topics: All categories in the pool
1: The solution that leaves the concentrator in an absorption chiller is referred to as the
- strong solution
- absorbed solution
- diluted solution
- weak solution
2: What happens after your initial inspection of a pressure vessel?
- Notify the Fire Marshal that the system has been inspected and approved
- Inspector leaves a metal tag with a certification listed on it
- Notify the AHJ to let them know that the system been inspected
- There is a temporary shut-down until a final inspection can be performed.
3: What is the temperature that a liquid and a vapor can exist in equilibrium called?
- Wet bulb temperature
- Saturated temperature
- Dry bulb temperature
- Critical temperature
4: 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
5: Pressure relief valves shall be marked with the data from
- Section XIII Division of the ASME Boiler & Pressure Code
- Section IV Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code
- Section VIII Division of the ASME Boiler & Pressure Code
6: In a horizontal shell & tube condenser, the ammonia is liquefied by
- passing thru the tubes from top to bottom
- water sprayed over condenser
- removing the latent heat of fusion
- removing the latent heat of vaporization
7: At higher altitudes, boiling temperatures
- increase
- depends on the refrigerant
- decrease
- are unaffected
8: What type of voltage cause a potential relay to open?
- 24 volt supply from the thermostat
- 120 volt line voltage
- Pick-up voltage
- none of the above
9: What are the three components of a transformer?
- Contacts, secondary coil, and core
- Primary coil, secondary coil, and copper contacts
- Primary core, secondary coil, and high and low voltage connectors.
- Primary coil, secondary coil, and core
10: Which creates more of a heat load?
- 90% RH
- 70% RH
- 30% RH
- 50% RH
11: Horizontal piping should be run level.
- No, unless the supervisor on the job says so.
- False
- Yes, if the condenser is located above the evaporator
- True
12: Ammonia (NH3) is a group III refrigerant
- True
- False
13: The two float-type metering devices are the
- liquid float and the low-side float
- vapor float and the low-side float.
- liquid float and the vapor float
- high-side float and the low-side float
14: A class B1 refrigerant is considered
- toxic but non-flammable
- toxic and somewhat flammable
- non-toxic and non-flammable
- non-toxic but highly flammable
15: Which refrigerant replaced R-12?
- R-410A
- R-134A
- R-22
- R-407A
16: 14.7 psia is equivalent to
- atmospheric pressure at seal level
- 29.92" Hg
- 0 psig
- All of the above.
17: "I" represents ____ in the Ohm's law formula.
- capacitance
- voltage.
- amperage
- resistance
18: It takes how many BTU's of latent heat/hr to boil 1 lbs of water into steam?
- 24,000 BTU
- 144 BTU
- 12,000 BTU
- 970 BTU
19: How many forces operate a thermostatic expansion valve?
- 2
- 4
- 3
- 1
20: Calculate the voltage in a series circuit when the total amperage is 10 amps and the resistors have values of: R1=12 ohms, R2=8 ohms, R3=4 ohms
- 2.40 volts
- 24.0 volts
- 240 volts
- 2,400 volts
21: How many BTU's is produced by one watt of energy
- 2.57
- 1
- 3.41
- 3.00
22: Absolute pressure is
- Gauge Pressure
- Atmospheric Pressure
- Gauge + Atmospheric Pressure + Pi
- none of the above
23: "R" represents ___ in the Ohm's law formula
- amperage
- capacitance
- voltage
- resistance
24: If the suction pressure is low and the evaporator temperature high, the cause will be a?
- compressor suction valve stuck open
- overcharged
- starved evaporator
- too small evaporator
25: Evaporators within 18" of a heating coil must be equipped with a
- zone valve
- high limit control
- pressure relief device
- low limit control