Liquid Fuels Volume 2
Liquid Fuels Volume 2 CerTest
- 1.A magnet that is magnetized by induction from an external source is called?
- A.
External Magnet
- B.
An artifical magnet
- C.
U magnet
- D.
Internal Magnet
- 2.What best descibes a schematic diagram?
- A.
Called a one line diagram, not usefull for trouble shooting
- B.
Called a one line diagram, very usefull for trouble shooting
- C.
Called a 2 line diagram, not usefull for troubleshooting
- D.
Called a 2 line diagram, very useful for trouble shooting
- 3.How much current flow is in a circuit with 24 volts applied and with 72 OHMS resistance
- A.
.3 ampers
- B.
.33 ampers
- C.
.02 ampers
- D.
.22 ampers
- 4.The joint resistance of a parallel circuit is equal to the applied voltage divided by what
- A.
Voltage
- B.
Resistance
- C.
Total Current
- D.
Conductivity
- 5.How is the measurement of the apparent power an of AC electrical system expressed
- A.
Amperes
- B.
OHMS
- C.
Farads
- D.
Kilovolt-amperes
- 6.What unit of measurement is used when calculating the inductance of a coil
- A.
Henry
- B.
Farad
- C.
Kilovolts
- D.
Amps
- 7.A 110-volt AC motor reads 20 inline amperes, and the inline voltmeter shows only 1,936 being consumed, what is the power factor of the AC Circuit
- A.
70% pf
- B.
78% pf
- C.
80% pf
- D.
88% pf
- 8.What type of generator has bushings riding ont he commutator to carry the current to a external circuit
- A.
AC Type
- B.
DC type
- C.
AC/DC Type
- D.
All the above
- 9.What is the open circuit voltage of a lead- acid storage battery
- A.
.2 volts
- B.
2 volts
- C.
2.2 volts
- D.
2.22 volts
- 10.What is the primary voltage of a transformer that has a secondary voltage of 240 volts and is rated 1-3 turn ratio
- A.
70 volts
- B.
75 volts
- C.
80 volts
- D.
85 volts
- 11.What item is not a part of a DC motor
- A.
Bushings
- B.
External windings
- C.
Stator
- D.
Throttle bushing
- 12.The magnetic feild of a 3 phase motor rotor is caused by
- A.
Current flow in the rotor
- B.
Resistance in the rotor
- C.
Current flow on the stator
- D.
Resistance to the stator
- 13.In what way does a DC Shunt motor have the feild coils and armature connected
- A.
In series
- B.
In parrallel
- C.
Opposite
- D.
Together
- 14.What is the power in watts consumed by a circuit with 120 volots applied and a resistance of 12 ohms
- A.
12 watts
- B.
120 watts
- C.
1,200 watts
- D.
12,000 watts
- 15.What should you connect and how, to operate a single phase dual voltage motor on high voltage
- A.
Run windings in parrallel
- B.
Run windings in series
- C.
Stator in parrallel
- D.
Stator in series
- 16.The squirrel- cage winding has inductive reactance and is placed beneath what
- A.
The stator
- B.
The Bushings
- C.
The wound rotor section
- D.
The voltage supply
- 17.What motor requires some starting
- A.
Single phase DC motor
- B.
Dual phase DC motor
- C.
Single phase AC motor
- D.
Dual phase AC motor
- 18.What are the characteristics of a 3 phase motor
- A.
Single voltage
- B.
Dual voltage
- C.
Thriple voltage
- D.
Either single or dual voltage motors
- 19.An indication of an open rotor in a squirrel cage motor is?
- A.
Excessive heat
- B.
Loud noise
- C.
The motor slowing under load
- D.
All the above
- 20.The internal windings of all 3 phase motors are
- A.
Wye connected
- B.
Delta connected
- C.
Either wye or delta connected
- D.
None of the above
- 21.Kirchoff's voltage law states that
- A.
The sum of voltages around a close loop must equal applied voltage
- B.
The sum of voltages around a open loop must equal applied voltage
- C.
The sum of voltages around a closed loop must equal zero
- D.
The sum of voltages around a open loop must equal zero
- 22.What completes an electrical cycle of an AC generator
- A.
1 positive and 1 negative alteration
- B.
2 postive and 1 negative alteration
- C.
1 positive and 2 negative alteration
- D.
2 positive and 2 negative alteration
- 23.The end play of a motor should not exceed what?
- A.
1 inch
- B.
3/4 inch
- C.
1/10 inch
- D.
1/64 inch
- 24.The method used to open the contacts on a across the line magnetic controller are?
- A.
Flipping the breaker
- B.
Spring tension and gravity
- C.
With a screwdriver
- D.
Applied voltage
- 25.The device used in most magnetic across the line motor controllers to reduce chater is
- A.
Flexible coupling
- B.
Non spark throttle bushings
- C.
Shaded rings
- D.
Stator cover
Questions: 76 | Attempts: 4078 | Last updated: Jun 21, 2021
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