Exam (elaborations)

General Exam AVMT UPDATED Exam Questions and CORRECT Answers

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AVMT

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AVMT

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Uploaded on August 23, 2024
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General Exam AVMT UPDATED Exam
Questions and CORRECT Answers

The working voltage of a capacitor in an AC circuit should be - CORRECT ANSWER- at
least 50 percent greater than the highest applied voltage

The term that describes the combined resistive forces in an AC circuit is - CORRECT
ANSWER- impedance

The basis for transformer operation in the use of alternating current is mutual - CORRECT
ANSWER- inductance

The opposition offered by a coil to the flow of alternating current is called (disregard
resistance) - CORRECT ANSWER- inductive reactance

An increase in which of the following factors will cause an increase in the inductive
reactance of a circuit? - CORRECT ANSWER- Inductance and frequency

When different rated capacitors are connected in series in a circuit, the total impedance is -
CORRECT ANSWER- less than the capacitance of the lowest rated capacitor

Capacitors are sometimes used in DC circuits to - CORRECT ANSWER- smooth out slight
pulsations in current/voltage

In an AC circuit, the effective voltage is - CORRECT ANSWER- less than the maximum
instantaneous voltage

The amount of electricity a capacitor can store is directly proportional to the - CORRECT
ANSWER- plate area and inversely proportional to the distance between the plates

What is the total capacitance of a circuit containing three capacitors with a capacitance of .02
microfarad, .05 microfarad, and .10 microfarad, respectively? - CORRECT ANSWER- .0125
uF

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

When different rated capacitors are connected in parallel in a circuit, the total capacitance is -
CORRECT ANSWER- equal to the sum of all the capacitances

When indicutors are connected in series in a circuit, the total inductance is - CORRECT
ANSWER- equal to the sum of the individual inductances

When more than two inductors of different inductances are connected in parallel in a circuit,
the total inductance is - CORRECT ANSWER- less than the inductance of the lowest rated
inductor

What is the total capacitance of a certain circuit containing three capacitors with capacitances
of .25 microfarad, .03 microfarad, and .12 microfarad, respectively? - CORRECT ANSWER-
.4 uF

Which requires the most electrical power during operation? - CORRECT ANSWER- Two
lights requiring 3 amps each in a 24-volt parallel system

How much power must a 24-volt generator furnish to a system which contains the following
loads?
One motor 75% 1/5 HP
Three position lights 20W each
One heating element 5 amp
One anticollision light 3 amp
(Note: 1 horsepower = 746 W) - CORRECT ANSWER- 450 Watts

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? -
CORRECT ANSWER- 1,000 watts

,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? - CORRECT ANSWER- 25.23 amperes

A 1-horsepower, 24-volt DC electric motor that is 80% efficient requires 932.5 watts. How
much power will a 1 hp, 12V DC electric motor that is 75% efficient require? - CORRECT
ANSWER- 994.6 Watts

The potential difference between two conductors which are insulated form each other is
measured in - CORRECT ANSWER- Volts

A 24V source is required to furnish 48W to a parallel circuit consisting of four resistors of
equal value. What is the voltage drop across each resistor? - CORRECT ANSWER- 24V

When calculating power in a reactive or inductive AC circuit, the true power is - CORRECT
ANSWER- less than the apparent power

What is the impedance of an AC-Series circuit consisting of an inductor with a reactance of
10 ohms, a capacitor with a reactance of 4 ohms, and a resistor with a resistance of 8 ohms? -
CORRECT ANSWER- 10 Ohms

The correct way to connect a test voltmeter in a circuit is - CORRECT ANSWER- in parallel
with a unit

Which term means .001 ampere? - CORRECT ANSWER- Miliampere

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 - CORRECT
ANSWER- equal to the voltage across the 20-watt light

A 14-Ohm resistor is to be installed in a series circuit carrying .05 ampere. How much power
will the resistor be required to dissipate? - CORRECT ANSWER- At least 35 milliwatts

.002KV equals - CORRECT ANSWER- 2.0 Volts

, A 24V source is required to furnish 48W to a parallel circuit consisting of two resistors of
equal value. What is the value of each resistor? - CORRECT ANSWER- 24 Ohms

Which required more electrical power? - CORRECT ANSWER- A 1/5 hp, 24V motor which
is 75% efficient

What unit is used to express electrical power? - CORRECT ANSWER- Watts

What is the operating resistance of a 30W light bulb designed for a 28V system? - CORRECT
ANSWER- 26Ohms

Which statement is correct when made in reference to a parallel circuit? - CORRECT
ANSWER- The total current is equal to the sum of the currents through the individual
branches of the circuit

Which of the following are commonly used as rectifiers in electrical circuits? - CORRECT
ANSWER- Diodes

Diodes are used in electrical power supply circuits primarily as - CORRECT ANSWER-
rectifiers

Transfer of electric energy from one circuit to another without the aid of electrical
connections - CORRECT ANSWER- is called induction

If three resistors of 3 ohms, 5 ohms, and 22 ohms are connected in series in a 28-volt circuit,
how much current will flow through the 3-ohm resistor? - CORRECT ANSWER- 0.93 amps

A circuit has an applied voltage of 30 volts and a load consisting of a 10-ohm resistor in
series with a 20-ohm resistor. What is the voltage drop across the 10-ohm resistor? -
CORRECT ANSWER- 10 Volts

Which is correct in reference to the electrical resistance? - CORRECT ANSWER- If one of
three bulbs in a parallel lighting circuit is removed, the total resistance of the circuit will
become greater

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Exam (elaborations)

General Exam AVMT UPDATED Exam Questions and CORRECT Answers

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