AMT GENERAL TEST GUIDE
the working voltage of a capacitor in an AC circuit shoulw be - at least 50 percent
greater than the highest applied voltage
the term that describes the combined resistive forces in an AC circuit is - impedance
what is the opposition to the flow of AC produced by a magnetic field with generated
back voltage (EMF) called? - inductive reactance
electrostatic fields are also known as - dielectric fields
The basis for transformer operation is in the use of alternating current is mutual -
inductance
The opposition offered by a coil to the flow of alternating current is called (disregard
resistance) - inductive reactance
what factors strengthen a coil inductor - adding coils close together
an increase in which of the following factors will cause an increase in the inductive
reactance of a circuit - inductance and frequency
when the different rated capacitors are connected in series in a circuit, the total
capacitance is - less than the capacitance of the lowest rated capacitor
Capacitors are sometimes used in DC circuits to - smooth out slight pulsations in
current/voltage.
In an AC circuit, the effective voltage is - less than the maximum instantaneous voltage
The amount of electricity a capacitor can store is directly proportional to the - plate area
and inversely proportional to the distance between the plates
What is the total capacitance of a certain circuit containing three capacitors with
capacitances of .02 microfarad, .05 microfarad, and .10 microfarad, respectively - .0125
uF
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
, Convert farads to microfarads by - multiplying farads by 10 to the power of 6
Convert farads to picofarads by - 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 - effective values
When different rated capacitors are connected in parallel in a circuit, the total
capacitance is - equal to the sum of all the capacitances
When inductors are connected in series in a circuit, the total inductance is (where the
magnetic fields of each inductor do not affect the others) - 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 - 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 - .4 uF
Which requires the most electrical power during operation - two lights requiring 3
amperes each in a 24-volt parallel system
How much power must a 24-volt generator furnish to a system which contains the
following loads - 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 - 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? - 25.23 amperes
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? - 994.6
The potential difference between two conductors which are insulated from each other is
measured in - volts
Which effect does not apply to the movement of electrons flowing in a conductor? -
Static energy
the working voltage of a capacitor in an AC circuit shoulw be - at least 50 percent
greater than the highest applied voltage
the term that describes the combined resistive forces in an AC circuit is - impedance
what is the opposition to the flow of AC produced by a magnetic field with generated
back voltage (EMF) called? - inductive reactance
electrostatic fields are also known as - dielectric fields
The basis for transformer operation is in the use of alternating current is mutual -
inductance
The opposition offered by a coil to the flow of alternating current is called (disregard
resistance) - inductive reactance
what factors strengthen a coil inductor - adding coils close together
an increase in which of the following factors will cause an increase in the inductive
reactance of a circuit - inductance and frequency
when the different rated capacitors are connected in series in a circuit, the total
capacitance is - less than the capacitance of the lowest rated capacitor
Capacitors are sometimes used in DC circuits to - smooth out slight pulsations in
current/voltage.
In an AC circuit, the effective voltage is - less than the maximum instantaneous voltage
The amount of electricity a capacitor can store is directly proportional to the - plate area
and inversely proportional to the distance between the plates
What is the total capacitance of a certain circuit containing three capacitors with
capacitances of .02 microfarad, .05 microfarad, and .10 microfarad, respectively - .0125
uF
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
, Convert farads to microfarads by - multiplying farads by 10 to the power of 6
Convert farads to picofarads by - 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 - effective values
When different rated capacitors are connected in parallel in a circuit, the total
capacitance is - equal to the sum of all the capacitances
When inductors are connected in series in a circuit, the total inductance is (where the
magnetic fields of each inductor do not affect the others) - 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 - 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 - .4 uF
Which requires the most electrical power during operation - two lights requiring 3
amperes each in a 24-volt parallel system
How much power must a 24-volt generator furnish to a system which contains the
following loads - 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 - 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? - 25.23 amperes
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? - 994.6
The potential difference between two conductors which are insulated from each other is
measured in - volts
Which effect does not apply to the movement of electrons flowing in a conductor? -
Static energy
