Question 1

(Refer to Figure 19.) Under which condition will a ground be provided for the warning horn through both gear switches when the throttles are closed?

Accepted Answer

Left gear up and right gear down.
ref)A ground for the landing gear warning horn is provided through both of the gear switches only when the right landing gear is down and the left landing gear is up.

Question 2

What is the total capacitance of a certain circuit containing three capacitors with capacitances of .25 microfarad, .03 microfarad, and .12 microfarad, respectively?
(Note: C(T) = C(1) + C(2) + C(3))

Accepted Answer

When three capacitors are connected in parallel, their total capacitance is the sum of the individual capacitances.
C(T) = C(1) + C(2) + C(3)
= 0.25 + 0.03 = 0.12
= 0.4 microfarad

Question 3

The basis for transformer operation in the use of alternating current is mutual

Accepted Answer

A transformer operates on the basis of mutual inductance. The changing current in the primary windings produces a changing magnetic field whose flux cuts across the turns of the secondary winding and induces a voltage into it.

Question 4

What is the basic unit of electrical quantity?

Accepted Answer

The coulomb is the basic unit of electrical quantity. One coulomb is equal to 6.28 X 10^18 electrons.

Question 5

A cabin entry light of 10 watts and a dome light of 20 watts are connected in parallel to a 30-volt source. If the voltage across the 10-watt light is measured, it will be

Accepted Answer

equal to the voltage across the 20-watt light.
ref)When lights are connected in parallel across a voltage source, the voltage across each of the lights will be the same as the voltage of the source.

Question 6

What does the letter Q symbolize when measuring electrical charge?

Accepted Answer

Coulomb. REF)The general formula for capacitance in terms of charge and voltage is C = Q/E, where:
C = Capacitance measured in farads
E = Applied voltage measured in volts
Q = Charge measured in coulombs.

Question 7

The opposition offered by a coil to the flow of alternating current (ignoring resistance) is called

Accepted Answer

inductive reactance REF)

Question 8

When different rated capacitors are connected in series in a circuit, the total capacitance is

Accepted Answer

When capacitors of different values are connected in series, the total capacitance is less than that of the lowest rated capacitor.

Question 9

The method used to rapidly charge a nickel-cadmium battery utilizes

Accepted Answer

Nickel-cadmium batteries can be charged rapidly by using constant voltage and varying current.

Question 10

.002 kV equals

Accepted Answer

One kilovolt (kV) is 1,000 volts. Two thousandths (.002) of a kilovolt is equal to 2.0 volts.

Question 11

What will a voltmeter read if properly connected across a closed switch in a circuit with electrical power on?

Accepted Answer

When a voltmeter is connected across a closed switch in perfect condition or a good fuse, it will read zero voltage. A voltage drop of up to 0.2 volts is acceptable with maximum circuit current flow through the switch.

Question 12

(Refer to Figure 25.) In a functional and operating circuit, the depicted logic gate's output will be 0

Accepted Answer

This is an AND gate. Any time one or more of the inputs do not have a 1 on them (have a 0 on them), the output will be 0. For the output to be 1, all of the inputs must be 1.

Question 13

Which requires the most electrical power?
(Note: 1 horsepower = 746 watts)

Accepted Answer

The 1/5-horsepower motor operating at 75 percent efficiency uses 198.93 watts of power.

Question 14

(Refer to Figure 14.) The total resistance of the circuit is

Accepted Answer

17 ohms.

Question 15

(Refer to Figure 11.) Find the voltage across the 8-ohm resistor.

Accepted Answer

The 8-ohm resistor, R(1), is across the full 24 volts of the battery.

Question 16

Convert farads to microfarads by

Accepted Answer

multiplying farads by 10 to the power of 6 
ref) One farad is equal to 10^6 microfarads. Example: 2 farads is equal to 2 x 10^6 (2,000,000) microfarads.

Question 17

The electrolyte of a nickel cadmium battery is highest when the battery is

Accepted Answer

in a fully charged condition. REf)

Question 18

A 24-volt source is required to furnish 48 watts to a parallel circuit consisting of two resistors of equal value. What is the value of each resistor?
(Note: R(t) = E^2/P)

Accepted Answer

R(T) = E^2 ÷ P
= 24^2 ÷ 48
= 12 ohms There are two resistors of equal value in parallel that provide this resistance, therefore each resistor must have a resistance of twice this value, or 24 ohms.

Question 19

(Refer to Figure 17.) Which of the components is a potentiometer?

Accepted Answer

3 r
ref) The component identified as 3 is a potentiometer. The component identified as 5 is a variable capacitor. The component identified as 11 is an inductor (choke).

Question 20

Unless otherwise specified, any values given for current or voltage in an AC circuit are assumed to be

Accepted Answer

effective values. Ref) Almost all measuring instruments used for electrical system servicing measure the effective rms values of alternating current.

Question 21

When referencing resistance in a parallel DC circuit, which of the following statements is true?

Accepted Answer

According to Kirchhoff's current law, the current flowing in a parallel circuit is equal to the sum of the currents flowing through each of the individual branches of the circuit.

Question 22

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-horsepower electric motor require?
(Note: 1 horsepower = 746 watts)

Accepted Answer

1,000 watts.

Question 23

(Refer to Figure 22.) Which illustration is correct concerning bias application and current (positive charge) flow?

Accepted Answer

1 ref) In 1, the base of this N-P-N transistor is positive with respect to the emitter (the emitter-base junction is forward biased). Base-emitter current flows and therefore collector emitter current flows as is shown by the current-flow arrow

Question 24

Which term means .001 ampere?

Accepted Answer

The metric prefix 'milli-' means one thousandth. 0.001 ampere is one milliampere.

Question 25

(Refer to Figure 19.) When the throttles are retarded with only the right gear down, the warning horn will not sound if an open occurs in wire

Accepted Answer

Wire 5 is in the landing gear warning horn ground circuit. If there is an open in this wire, the warning horn cannot get a ground when the right landing gear is down and the left gear is not down

Question 26

(Refer to Figure 8.) With an ohmmeter connected into the circuit as shown, what will the ohmmeter read?

Accepted Answer

The ohmmeter will read the resistance of R(1) and R(2) in parallel; this is 10 ohms. The open circuit (break) in resistor R(3) gives it an infinite resistance, and it does not affect the reading of the ohmmeter.

Question 27

Which is correct in reference to electrical resistance?

Accepted Answer

In a parallel electrical circuit, each bulb provides a path for current to flow. The more paths there are, the less the circuit resistance will be.

Question 28

The electrolyte of a nickel-cadmium battery is the lowest when the battery is

Accepted Answer

As a nickel-cadmium battery becomes discharged, some of the electrolyte is absorbed by the plates when the battery is fully discharged, its electrolyte level is the lowest.

Question 29

Typical application for zener diodes is as

Accepted Answer

voltage regulator

Question 30

The correct way to connect a test voltmeter in a circuit is

Accepted Answer

A voltmeter must always be connected in a circuit in parallel with the unit whose voltage is to be measured.

Question 31

(Refer to Figure 19.) When the landing gears are up and the throttles are retarded, the warning horn will not sound if an open occurs in wire

Accepted Answer

Wire 6 is in the ground circuit for the landing gear warning horn. The horn will not sound if there is an open in this wire when the throttles are retarded and the landing gears are up.

Question 32

What happens to the current in a voltage step-up transformer with a ratio of 1 to 4?

Accepted Answer

The current is stepped down by a 1 to 4 ratio

Question 33

(Refer to Figure 24.) Which statement concerning the depicted logic gate is true?

Accepted Answer

This is an OR gate. Any time there is a 1 on any of the inputs, there will be a 1 on the output.

Question 34

The voltage drop in a circuit of known resistance is dependent on

Accepted Answer

The voltage drop across a circuit is determined by two things: the resistance of the conductor and the amount of current flowing through it (the amperage).

Question 35

If electrolyte from a lead-acid battery is spilled in the battery compartment, which procedure should be followed?

Accepted Answer

Apply sodium bicarbonate solution to the affected area followed by a water rinse.

Question 36

Transfer of electric energy from one circuit to another without the aid of electrical connections

Accepted Answer

is called induction.

Question	Answer
(Refer to Figure 19.) Under which condition will a ground be provided for the warning horn through both gear switches when the throttles are closed?	Left gear up and right gear down. ref)A ground for the landing gear warning horn is provided through both of the gear switches only when the right landing gear is down and the left landing gear is up.
What is the total capacitance of a certain circuit containing three capacitors with capacitances of .25 microfarad, .03 microfarad, and .12 microfarad, respectively? (Note: C(T) = C(1) + C(2) + C(3))	When three capacitors are connected in parallel, their total capacitance is the sum of the individual capacitances. C(T) = C(1) + C(2) + C(3) = 0.25 + 0.03 = 0.12 = 0.4 microfarad
The basis for transformer operation in the use of alternating current is mutual	A transformer operates on the basis of mutual inductance. The changing current in the primary windings produces a changing magnetic field whose flux cuts across the turns of the secondary winding and induces a voltage into it.
What is the basic unit of electrical quantity?	The coulomb is the basic unit of electrical quantity. One coulomb is equal to 6.28 X 10^18 electrons.
A cabin entry light of 10 watts and a dome light of 20 watts are connected in parallel to a 30-volt source. If the voltage across the 10-watt light is measured, it will be	equal to the voltage across the 20-watt light. ref)When lights are connected in parallel across a voltage source, the voltage across each of the lights will be the same as the voltage of the source.
What does the letter Q symbolize when measuring electrical charge?	Coulomb. REF)The general formula for capacitance in terms of charge and voltage is C = Q/E, where: C = Capacitance measured in farads E = Applied voltage measured in volts Q = Charge measured in coulombs.
The opposition offered by a coil to the flow of alternating current (ignoring resistance) is called	inductive reactance REF)
When different rated capacitors are connected in series in a circuit, the total capacitance is	When capacitors of different values are connected in series, the total capacitance is less than that of the lowest rated capacitor.
The method used to rapidly charge a nickel-cadmium battery utilizes	Nickel-cadmium batteries can be charged rapidly by using constant voltage and varying current.
.002 kV equals	One kilovolt (kV) is 1,000 volts. Two thousandths (.002) of a kilovolt is equal to 2.0 volts.
What will a voltmeter read if properly connected across a closed switch in a circuit with electrical power on?	When a voltmeter is connected across a closed switch in perfect condition or a good fuse, it will read zero voltage. A voltage drop of up to 0.2 volts is acceptable with maximum circuit current flow through the switch.
(Refer to Figure 25.) In a functional and operating circuit, the depicted logic gate's output will be 0	This is an AND gate. Any time one or more of the inputs do not have a 1 on them (have a 0 on them), the output will be 0. For the output to be 1, all of the inputs must be 1.
Which requires the most electrical power? (Note: 1 horsepower = 746 watts)	The 1/5-horsepower motor operating at 75 percent efficiency uses 198.93 watts of power.
(Refer to Figure 14.) The total resistance of the circuit is	17 ohms.
(Refer to Figure 11.) Find the voltage across the 8-ohm resistor.	The 8-ohm resistor, R(1), is across the full 24 volts of the battery.
Convert farads to microfarads by	multiplying farads by 10 to the power of 6 ref) One farad is equal to 10^6 microfarads. Example: 2 farads is equal to 2 x 10^6 (2,000,000) microfarads.
The electrolyte of a nickel cadmium battery is highest when the battery is	in a fully charged condition. REf)
A 24-volt source is required to furnish 48 watts to a parallel circuit consisting of two resistors of equal value. What is the value of each resistor? (Note: R(t) = E^2/P)	R(T) = E^2 ÷ P = 24^2 ÷ 48 = 12 ohms There are two resistors of equal value in parallel that provide this resistance, therefore each resistor must have a resistance of twice this value, or 24 ohms.
(Refer to Figure 17.) Which of the components is a potentiometer?	3 r ref) The component identified as 3 is a potentiometer. The component identified as 5 is a variable capacitor. The component identified as 11 is an inductor (choke).
Unless otherwise specified, any values given for current or voltage in an AC circuit are assumed to be	effective values. Ref) Almost all measuring instruments used for electrical system servicing measure the effective rms values of alternating current.
When referencing resistance in a parallel DC circuit, which of the following statements is true?	According to Kirchhoff's current law, the current flowing in a parallel circuit is equal to the sum of the currents flowing through each of the individual branches of the circuit.
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-horsepower electric motor require? (Note: 1 horsepower = 746 watts)	1,000 watts.
(Refer to Figure 22.) Which illustration is correct concerning bias application and current (positive charge) flow?	1 ref) In 1, the base of this N-P-N transistor is positive with respect to the emitter (the emitter-base junction is forward biased). Base-emitter current flows and therefore collector emitter current flows as is shown by the current-flow arrow
Which term means .001 ampere?	The metric prefix 'milli-' means one thousandth. 0.001 ampere is one milliampere.
(Refer to Figure 19.) When the throttles are retarded with only the right gear down, the warning horn will not sound if an open occurs in wire	Wire 5 is in the landing gear warning horn ground circuit. If there is an open in this wire, the warning horn cannot get a ground when the right landing gear is down and the left gear is not down
(Refer to Figure 8.) With an ohmmeter connected into the circuit as shown, what will the ohmmeter read?	The ohmmeter will read the resistance of R(1) and R(2) in parallel; this is 10 ohms. The open circuit (break) in resistor R(3) gives it an infinite resistance, and it does not affect the reading of the ohmmeter.
Which is correct in reference to electrical resistance?	In a parallel electrical circuit, each bulb provides a path for current to flow. The more paths there are, the less the circuit resistance will be.
The electrolyte of a nickel-cadmium battery is the lowest when the battery is	As a nickel-cadmium battery becomes discharged, some of the electrolyte is absorbed by the plates when the battery is fully discharged, its electrolyte level is the lowest.
Typical application for zener diodes is as	voltage regulator
The correct way to connect a test voltmeter in a circuit is	A voltmeter must always be connected in a circuit in parallel with the unit whose voltage is to be measured.
(Refer to Figure 19.) When the landing gears are up and the throttles are retarded, the warning horn will not sound if an open occurs in wire	Wire 6 is in the ground circuit for the landing gear warning horn. The horn will not sound if there is an open in this wire when the throttles are retarded and the landing gears are up.
What happens to the current in a voltage step-up transformer with a ratio of 1 to 4?	The current is stepped down by a 1 to 4 ratio
(Refer to Figure 24.) Which statement concerning the depicted logic gate is true?	This is an OR gate. Any time there is a 1 on any of the inputs, there will be a 1 on the output.
The voltage drop in a circuit of known resistance is dependent on	The voltage drop across a circuit is determined by two things: the resistance of the conductor and the amount of current flowing through it (the amperage).
If electrolyte from a lead-acid battery is spilled in the battery compartment, which procedure should be followed?	Apply sodium bicarbonate solution to the affected area followed by a water rinse.
Transfer of electric energy from one circuit to another without the aid of electrical connections	is called induction.
The purpose of providing a space underneath the plates in a lead acid battery's cell container is to

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Fundamentals of Elec