Engineering Quiz: A Basic Electrical Theory Assessment Test
(51).jpg "Engineering Quiz: A Basic Electrical Theory Assessment Test")
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- 1.Frequency is measured in which of the following:
- A.
Voltage
- B.
Watts
- C.
Hertz
- D.
None of the above
- 2.For electroplating power, which of the following generators should be used?
- A.
Separately excited
- B.
Delta system
- C.
Split phase
- D.
None of the above
- 3.Power factor is equal to which of the following:
- A.
Apparent power multiplied by true power
- B.
True power divided by apparent power
- C.
Watts multiplied by amps
- D.
None of the above
- 4.The combined opposition to current by resistance and reactance is which of the following:
- A.
“Z”
- B.
Impedance
- C.
Both of the above
- D.
None of the above
- 5.In a generator, voltage is produced by which of the following conditions:
- A.
Electrical pressure
- B.
Vibration
- C.
Magnetism
- D.
Cutting lines of force
- 6.A capacitor performs which of the following functions:
- A.
It opposes changes in voltage
- B.
It generators voltage
- C.
It creates changes in amperage
- D.
None of the above
- 7.Where the current flow through a conductor is greatest will be the point where the voltage drop is the lowest.
- A.
True
- B.
False
- 8.Of all of the materials used for insulation, which of the following has the highest electrical breakdown strength and the longest life:
- A.
Rubber
- B.
Cloth
- C.
Impregnated paper
- D.
Colored vinyl
- 9.What does it cost per year (at 8 cents per kWh) for the power loss of a 12 AWG circuit conductor (100ft long) that has a total resistance of 0.40 ohms and current flow of 16A?
- A.
$30
- B.
$50
- C.
$70
- D.
$90
- 10.A three horsepower motor is equivalent to which of the following in watts:
- A.
746 watts
- B.
2238 watts
- C.
3000 watts
- D.
None of the above
- 11.Illumination is measured in which of the following units:
- A.
Lumens
- B.
Foot candles
- C.
Light per square inch
- D.
None of the above
- 12.Some copper conductors are tinned to help prevent chemical reaction:
- A.
A. True
- B.
B. False
- 13.Which of the following should be tested to check for voltage to ground?
- A.
A. From the breaker to the grounding neutral
- B.
B. From hot to neutral
- C.
C. From a breaker to the cabinet
- D.
D. All of the above
- 14.During one complete rotation of 360 degrees, a three-phase 6-pole AC 34 kVA alternator on a Y- connected system will have how many cycles:
- A.
4
- B.
3
- C.
18
- D.
12
- 15.Which of the following terms is used to describe the inductive action, which causes current to flow on the outer surface of a conductor:
- A.
Halo Effect
- B.
Inductance
- C.
Skin effect
- D.
Insulated par value
- 16.The wattage rating of a resistor determines its ability to absorb heat.
- A.
True
- B.
False
- 17.A wiring system has two lengths of wires, where wire A has a resistance of 10 ohms and wire B is three times the length of wire A with two times the cross-sectional area, which means that resistance of wire B is equal to which of the following:
- A.
30 ohms
- B.
20 ohms
- C.
15 ohms
- D.
10 ohms
- 18.The circuit conductors between service equipment and the final branch circuit overcurrent device are considered to be which of the following:
- A.
Service laterals
- B.
Feeder conductors
- C.
Grounded conductors
- D.
A wire assembly
- 19.The sum of series voltage drops equals the applied voltage.
- A.
True
- B.
False
- 20.If a transformer ratio is 20/1, then which of the following is true:
- A.
For every 20 turns in the primary, there is one turn in the secondary.
- B.
The primary voltage is 20 times greater than that of the secondary.
- C.
For every 20 rotations in the secondary, there is one rotation in the primary.
- D.
None of the above
- 21.When a switch on a 110 amp system is closed, the total resistance of the switch is equal to which of the following:
- A.
A. 55 amps
- B.
B. 220 volts
- C.
C. 1100 ohms
- D.
D. Zero
- 22.If a series circuit has unequal resistances throughout the circuit, then which of the following is true:
- A.
The lowest resistance has the highest current.
- B.
The lowest resistance has the highest voltage.
- C.
The highest resistance has the highest voltage.
- D.
The highest resistance has the highest current.
- 23.When reduced to the most nominal component, the smallest element of matter is which of the following:
- A.
One ohm of electrical current
- B.
An atom
- C.
Electrons
- D.
None of the above
- 24.The armature reaction in an alternator is magnetizing at lagging loads.
- A.
True
- B.
False
- 25.A wire secured at one end with the other end fastened to a pole under tension is known as which of the following:
- A.
Messenger wire
- B.
A service drop
- C.
A guy wire
- D.
None of the above
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