ASA Prepware General Written master
study guide
The working voltage of a capacitor in an AC circuit should be... - ✔✔ correct answer at least 50% greater
than the highest applied voltage
The term that described the combined resistive forces in an AC circuit is... - ✔✔ correct answer
Impedance
What is the opposition to the flow of AC produced by a magnetic field with a generated back voltage
(EMF) called? - ✔✔ correct answer Inductive resistance
Electrostatic fields are also known as... - ✔✔ correct answer Dielectric fields
The basis for transformer operation in the use of alternating current is mutual... - ✔✔ correct answer
inductance
What factors strengthen a coil inductor? - ✔✔ correct answer Adding coils close together
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 capacitance 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
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 certain circuit containing three capacitors in series with capacitances
of .02 microfarad, .05 microfarad, and .10 microfarad, respectively? - ✔✔ correct answer .0125
microfarads
,ASA Prepware General Written master
study guide
What is the total capacitance of a circuit containing three capacitors in parallel with capacitances of .02
microfarads, .05 microfarads, .10 microfarads, respectively? - ✔✔ correct answer .170 microfarads
Convert farads to microfarads by... - ✔✔ correct answer Multiplying farads by 10 to the power of 6.
Convert farads to picofarads by... - ✔✔ correct answer multiplying farads by 10 to the power of 12
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 inductors 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 requires the most electrical power during operation? - ✔✔ correct answer Two lights requiring 3
amperes each in a 24 volt parallel system
A 12V 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
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 25.2 amps
,ASA Prepware General Written master
study guide
A 1 horsepower, 24 Volt DC electric motor that is 80 percent efficient requires 932.5 watts. How much
power will a 1-horsepower, 12 volt DC electric motor that is 75 percent efficient require? - ✔✔ correct
answer 994.6 watts
The potential difference between two conductors which are from each other is measured in... - ✔✔
correct answer Volts
Which effect does not apply to the movement of the electrons flowing in a conductor. - ✔✔ correct
answer Static energy
A 24V source is required to furnish 48 watts 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
What will a voltmeter read if properly connected across a closed switch in a circuit with electrical power
on? - ✔✔ correct answer 0V
The correct way to connect a test voltmeter in a circuit is... - ✔✔ correct answer in parallel with a unit
Which term means .001 Amp - ✔✔ correct answer milliamp
what does the leter Q symbolize when measuring electrical charge? - ✔✔ correct answer Coulomb
, ASA Prepware General Written master
study guide
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
A 14 ohm resistor is to be installed in a series circuit carrying .05 amps. How much power will the resistor
be required to dissipate? - ✔✔ correct answer At least 35 milliwatts
.002KV equals... - ✔✔ correct answer 2.0 volts
The opposition offered by a coil to the flow of alternating current is called... - ✔✔ correct answer
inductive reactance
Diodes are used in electrical power supply circuits primarily as... - ✔✔ correct answer rectifiers
If each cell, connected in series, equals 2 volts, how would a 12-cell lead acid battery be rated? - ✔✔
correct answer 24 volts
Which requires the most electrical power? - ✔✔ correct answer A 1/5-horsepower, 24-volt motor which
is 75 percent efficient.
Transfer of electric energy from one circuit to another without the aid of electrical connection... - ✔✔
correct answer is called induction
A fully charged lead-acid battery will not freeze until extremely low temperatures are reached because...
- ✔✔ correct answer most of the acid is in the solution
A thermal switch, or thermal protector, as used in an electric motor, is designed to... - ✔✔ correct
answer Open the circuit in order to allow cooling of the motor
study guide
The working voltage of a capacitor in an AC circuit should be... - ✔✔ correct answer at least 50% greater
than the highest applied voltage
The term that described the combined resistive forces in an AC circuit is... - ✔✔ correct answer
Impedance
What is the opposition to the flow of AC produced by a magnetic field with a generated back voltage
(EMF) called? - ✔✔ correct answer Inductive resistance
Electrostatic fields are also known as... - ✔✔ correct answer Dielectric fields
The basis for transformer operation in the use of alternating current is mutual... - ✔✔ correct answer
inductance
What factors strengthen a coil inductor? - ✔✔ correct answer Adding coils close together
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 capacitance 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
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 certain circuit containing three capacitors in series with capacitances
of .02 microfarad, .05 microfarad, and .10 microfarad, respectively? - ✔✔ correct answer .0125
microfarads
,ASA Prepware General Written master
study guide
What is the total capacitance of a circuit containing three capacitors in parallel with capacitances of .02
microfarads, .05 microfarads, .10 microfarads, respectively? - ✔✔ correct answer .170 microfarads
Convert farads to microfarads by... - ✔✔ correct answer Multiplying farads by 10 to the power of 6.
Convert farads to picofarads by... - ✔✔ correct answer multiplying farads by 10 to the power of 12
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 inductors 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 requires the most electrical power during operation? - ✔✔ correct answer Two lights requiring 3
amperes each in a 24 volt parallel system
A 12V 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
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 25.2 amps
,ASA Prepware General Written master
study guide
A 1 horsepower, 24 Volt DC electric motor that is 80 percent efficient requires 932.5 watts. How much
power will a 1-horsepower, 12 volt DC electric motor that is 75 percent efficient require? - ✔✔ correct
answer 994.6 watts
The potential difference between two conductors which are from each other is measured in... - ✔✔
correct answer Volts
Which effect does not apply to the movement of the electrons flowing in a conductor. - ✔✔ correct
answer Static energy
A 24V source is required to furnish 48 watts 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
What will a voltmeter read if properly connected across a closed switch in a circuit with electrical power
on? - ✔✔ correct answer 0V
The correct way to connect a test voltmeter in a circuit is... - ✔✔ correct answer in parallel with a unit
Which term means .001 Amp - ✔✔ correct answer milliamp
what does the leter Q symbolize when measuring electrical charge? - ✔✔ correct answer Coulomb
, ASA Prepware General Written master
study guide
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
A 14 ohm resistor is to be installed in a series circuit carrying .05 amps. How much power will the resistor
be required to dissipate? - ✔✔ correct answer At least 35 milliwatts
.002KV equals... - ✔✔ correct answer 2.0 volts
The opposition offered by a coil to the flow of alternating current is called... - ✔✔ correct answer
inductive reactance
Diodes are used in electrical power supply circuits primarily as... - ✔✔ correct answer rectifiers
If each cell, connected in series, equals 2 volts, how would a 12-cell lead acid battery be rated? - ✔✔
correct answer 24 volts
Which requires the most electrical power? - ✔✔ correct answer A 1/5-horsepower, 24-volt motor which
is 75 percent efficient.
Transfer of electric energy from one circuit to another without the aid of electrical connection... - ✔✔
correct answer is called induction
A fully charged lead-acid battery will not freeze until extremely low temperatures are reached because...
- ✔✔ correct answer most of the acid is in the solution
A thermal switch, or thermal protector, as used in an electric motor, is designed to... - ✔✔ correct
answer Open the circuit in order to allow cooling of the motor
