Fundamentals of Electricity and Electronics (AMG Written)
1. The working voltage of a capacitor in an AC circuit should be: At least 50 percent greater
than the highest applied voltage.
2. The term that describes the combined resistive forces in an AC circuit is: Impedance
3. What is the operation to the flow of AC produced by an electromagnetic field (EMF) with generated
back voltage called?: Inductive reactance
4. Electrostatic fields are also known as: Dielectric fields
5. The basis for transformer operation in the use of alternating current is mutual: Inductance
6. The opposition offered by a coil to the flow of alternating current is called (disregard resistance):
Inductive reactance
7. What factors strengthen a coil inductor?: Adding coils close together
8. An increase in which of the following factors will cause an increase in the inductive reactance of
a circuit?: Inductance and frequency
9. (Referto figure 1.) When different rated capacitors are connected in series in a circuit, the total
capacitance is: Less than the capacitance of the lowest rated capacitor
10.Capacitors are sometimes used in DC circuits to: Smooth out slight pulsa- tions in
current/voltage.
11.In an AC circuit, the effective voltage is: Less than the maximum instanta- neous voltage
12.The amount of electricity a capacitor can store is directly proportional to the: Plate area and
inversely proportional to the distance between the plates
13.(Refer to figure 2.) What is the total capacitance of a certain circuit con- taining three
capacitors in series with capacitances of .02 microfarad, .05 microfarad, and .10 microfarad,
respectively?: .0125 uF.
14.Convert farads to microfarads by: Multiplying farads by 10 to the power of 6.
15.Convert farads to picofarads by: Multiplying farads by 10 to the power 12
16.What is the total capacitance of a circuit containing three capacitors in parallel with capacitances
of .02 Microfarad, .05 microfarad, and .10 microfarad respectively?: .170 uF.
17.Unless otherwise specified, any values given for current or voltage in an AC circuit are
assumed to be: Effective values.
18.When different rated capacitors are connected in parallel in a circuit, the total capacitance is
(Note: CT = C1 + C2 + C3 . . .): Equal to the sum of all the capacitances.
19.When indicators are connected in series in a circuit, the total inductance is (where the magnetic
fields of each inductor do not affect the others) (Note: LT = L1 + L2 + L3 . . .): Equal to the sum of
the individual inductances.
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, Fundamentals of Electricity and Electronics (AMG Written)
20.(Refer to figure 3.) When more than two inductors of different inductances are connected in
parallel in a circuit, the total inductance is: Less than the inductance of the lowest rated inductor.
21.What is the total capacitance of a certain circuit containing three capac- itors in parallel with
capacitances of .25 microfarad, .03 microfarad, and .12 microfarad, respectively?
(Note: CT = C1 + C2 + C3): .4 uF.
22.Which requires the most electrical power during operation? (Note: 1 horse- power = 746 watts):
Two lights requiring 3 amperes each in a 24-volt parallel system.
23.How much power must a 24-volt generator furnish to a system which contains the
following loads? (Note: 1 horsepower = 746 watts) Unit/Rating
One motor (75 percent efficient) / 1/5 hp Three
position lights / 20 watts each One heating element /
5 amp
One anticollision light / 3 amp: 450 watts.
24.A 12-volt electric motor has 1,000 watts input and 1 horsepower output. Maintaining the same
efficiency, how much input power will a 24-volt, 1 horse- power electric motor require?
(Note: 1 horsepower = 746 watts): 1,000 watts.
25.How many amperes will a 28-volt generator be required to supply to a circuit containing five
lamps in parallel, three of which have a resistance of 6 ohms each and two of which have a resistance
of 5 ohms each?: 25.23 amperes
26.A 1-horsepower, 24-volt DC electric motor that is 80% efficient requires
932.5 watts. How much power will a 1-horsepower, 12-volt DC electric motor that is 75% efficient
require?: 994.6 watts.
27.The potential difference between two conductors which are insulated from each other is
measured in: Volts.
28.Which effect does not apply to the movement of electrons flowing in a conductor?: Static
energy.
29.A 24-volt source is required to furnish 48 watts to a parallel circuit con- sisting of four resistors
of equal value. What is the voltage drop across each resistor?: 24 volts.
30.When calculating power in a reactive or inductive AC circuit, the true power is: Less than the
apparent power.
31. (Refer to figure 4.) How much power is being furnished to the circuit?: 2,645 watts.
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1. The working voltage of a capacitor in an AC circuit should be: At least 50 percent greater
than the highest applied voltage.
2. The term that describes the combined resistive forces in an AC circuit is: Impedance
3. What is the operation to the flow of AC produced by an electromagnetic field (EMF) with generated
back voltage called?: Inductive reactance
4. Electrostatic fields are also known as: Dielectric fields
5. The basis for transformer operation in the use of alternating current is mutual: Inductance
6. The opposition offered by a coil to the flow of alternating current is called (disregard resistance):
Inductive reactance
7. What factors strengthen a coil inductor?: Adding coils close together
8. An increase in which of the following factors will cause an increase in the inductive reactance of
a circuit?: Inductance and frequency
9. (Referto figure 1.) When different rated capacitors are connected in series in a circuit, the total
capacitance is: Less than the capacitance of the lowest rated capacitor
10.Capacitors are sometimes used in DC circuits to: Smooth out slight pulsa- tions in
current/voltage.
11.In an AC circuit, the effective voltage is: Less than the maximum instanta- neous voltage
12.The amount of electricity a capacitor can store is directly proportional to the: Plate area and
inversely proportional to the distance between the plates
13.(Refer to figure 2.) What is the total capacitance of a certain circuit con- taining three
capacitors in series with capacitances of .02 microfarad, .05 microfarad, and .10 microfarad,
respectively?: .0125 uF.
14.Convert farads to microfarads by: Multiplying farads by 10 to the power of 6.
15.Convert farads to picofarads by: Multiplying farads by 10 to the power 12
16.What is the total capacitance of a circuit containing three capacitors in parallel with capacitances
of .02 Microfarad, .05 microfarad, and .10 microfarad respectively?: .170 uF.
17.Unless otherwise specified, any values given for current or voltage in an AC circuit are
assumed to be: Effective values.
18.When different rated capacitors are connected in parallel in a circuit, the total capacitance is
(Note: CT = C1 + C2 + C3 . . .): Equal to the sum of all the capacitances.
19.When indicators are connected in series in a circuit, the total inductance is (where the magnetic
fields of each inductor do not affect the others) (Note: LT = L1 + L2 + L3 . . .): Equal to the sum of
the individual inductances.
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, Fundamentals of Electricity and Electronics (AMG Written)
20.(Refer to figure 3.) When more than two inductors of different inductances are connected in
parallel in a circuit, the total inductance is: Less than the inductance of the lowest rated inductor.
21.What is the total capacitance of a certain circuit containing three capac- itors in parallel with
capacitances of .25 microfarad, .03 microfarad, and .12 microfarad, respectively?
(Note: CT = C1 + C2 + C3): .4 uF.
22.Which requires the most electrical power during operation? (Note: 1 horse- power = 746 watts):
Two lights requiring 3 amperes each in a 24-volt parallel system.
23.How much power must a 24-volt generator furnish to a system which contains the
following loads? (Note: 1 horsepower = 746 watts) Unit/Rating
One motor (75 percent efficient) / 1/5 hp Three
position lights / 20 watts each One heating element /
5 amp
One anticollision light / 3 amp: 450 watts.
24.A 12-volt electric motor has 1,000 watts input and 1 horsepower output. Maintaining the same
efficiency, how much input power will a 24-volt, 1 horse- power electric motor require?
(Note: 1 horsepower = 746 watts): 1,000 watts.
25.How many amperes will a 28-volt generator be required to supply to a circuit containing five
lamps in parallel, three of which have a resistance of 6 ohms each and two of which have a resistance
of 5 ohms each?: 25.23 amperes
26.A 1-horsepower, 24-volt DC electric motor that is 80% efficient requires
932.5 watts. How much power will a 1-horsepower, 12-volt DC electric motor that is 75% efficient
require?: 994.6 watts.
27.The potential difference between two conductors which are insulated from each other is
measured in: Volts.
28.Which effect does not apply to the movement of electrons flowing in a conductor?: Static
energy.
29.A 24-volt source is required to furnish 48 watts to a parallel circuit con- sisting of four resistors
of equal value. What is the voltage drop across each resistor?: 24 volts.
30.When calculating power in a reactive or inductive AC circuit, the true power is: Less than the
apparent power.
31. (Refer to figure 4.) How much power is being furnished to the circuit?: 2,645 watts.
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