A And P General

Front 1

The working voltage of a capacitor in an ac circuit should be

Back 1

At least 50% greater than the highest applied voltage.

Front 2

The term that describes the combined resistive forces

Back 2

Impedance

Front 3

What is the opposition to the flow of ac produced by a magnetic field generated back voltage emf called ?

Back 3

Inductive reactance

Front 4

Electrostatic fields are also known as

Back 4

Dielectric fields.

Front 5

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

Back 5

Inductance.

Front 6

The opposition offered by a coil to the flow of alternating current is called? Disregard resistance

Back 6

Inductive reactance.

Front 7

An increase in which of the following factors will cause an increase in the inductive reactance of a circuit?

Back 7

Inductance and frequency

Front 8

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

Back 8

Less than the capacitance of the lowest rates capacitor

Front 9

Capacitors are sometimes used in DC circuits to

Back 9

Smooth out slight pulsations in current-voltage

Front 10

In an AC circuit the effective voltage is

Back 10

Less than the maximum instantaneous voltage

Front 11

The amount of electricity a capacitor can store is directly proportional to the

Back 11

Plate area in and inversely proportional to the distance between the plates

Front 12

What is the total capacitance of a certain circuit containing three capacitors with capacitance of .02 microfarad .05 microfarad and .10 microfarad respectively

Back 12

.0125 microfarad

Front 13

What is the total capacitance of a circuit containing 3 capacitors in parallel with capacitance of a .02 microfarad .05 microfarad and .10 microfarad respectively

Back 13

.170 microfarad

Front 14

How do you convert farads to microfarads

Back 14

By multiplying farads x 10 to the 6th power

Front 15

How do you convert farad's to picofarads

Back 15

By multiplying farads x 10 to the power of 12

Front 16

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

Back 16

Effective values

Front 17

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

Back 17

Equal to the sum of all the capacitances

Front 18

When more than two inductors of different inductance are connected in parallel in a circuit the total inductance is

Back 18

Less than the inductance of the lowest rated inductor

Front 19

What is the total capacitance of a certain circuit containing three capacitors with capacitance of .25 microfarad .03 microfarad and .12 microfarad

Back 19

.4 microfarad

Hint 19

A+b+c

Front 20

Which requires the most electrical power during operation?

a 12-volt motor required 8 amp or Four 30 watt lamps in a 12 volt parallel circuit or Two lights requiring 3 amps each in a 24 volt parallel system

Back 20

Two lights requiring 3 amps each in a 24 volt parallel system

Front 21

How much power must a 24 volt generator furnished to a system which contains the following loads

One motor 75% efficiency 1/5 horse power

Three position lights 20 watts each

One heating element 5 amps

Anticolisikn light 3 amps

Back 21

451 watts.

Front 22

A 12 volt electric motor has 1000 Watts input and 1 horsepower output maintaining the same efficiency how much input or 24 volt 1 horsepower electric motor require

Back 22

1000

Front 23

How many amps will a 28 volt generator be required to supply to a circuit containing 5 lamps in parallel three of which have a resistance of 6 ohms each and 2 of which have a resistance of 5 ohms each

Back 23

25.23 amps

Front 24

81 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% efficiency require?

Back 24

994.6 watts

Hint 24

747/.75

Front 25

If resistor R5 is disconnected at the junction or R4 and R3 has shown what will the ohm meter read

Back 25

3 ohms

Front 26

If resistor R3 is disconnected at Terminal D what will the ohm meter read?

Back 26

Infinite resistance

Front 27

With an OHM meter connected into the circuit as shown what will the ohm meter read

Back 27

10 ohms

Front 28

How many instruments volt meters in ammeters are installed correctly

Back 28

Two

Front 29

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

Back 29

In parallel with a unit

Front 30

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

Back 30

0 voltage

Front 31

Which term means .001 ampere

Back 31

Milli ampere

Front 32

A cabin entry light of 10 watts in a dome light of 20 watts are connected in parallel to a 30 volt Source if the voltage across 10 watt light is measured it will be

Back 32

Equal to the voltage across the 20 watt light

Front 33

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

Back 33

At least 35 milliwatts

Front 34

.002 KV equals

Back 34

2.0 volts

Front 35

What is the measured voltage of the series parallel circuit between terminals a and b

Back 35

3.0 volts

Front 36

24 volt source is required to furnish 48 watts to parallel circuit consisting of two resistors of equal value what is the value of each resistor?

Back 36

24 ohms

Hint 36

R= E squared /p. R=ohms E=volts P=watts 24^2 / 48

Front 37

Which requires the most electric power?

Back 37

A 1/5 horse power 24 volt motor which is 75% efficient

Front 38

What unit is used to express electrical power

Back 38

Watt

Front 39

What is the basic unit of electrical quantity

Back 39

Coulomb

Front 40

What is the operating resistance of a 30 watt light bulb designed for a 28 volt system

Back 40

26.13 ohms

Front 41

Which statement is correct when made in reference to a parallel circuit

Back 41

The total current is equal to the sum of the current through the individual branches of the circuit

Front 42

Which of the following are commonly used as rectifiers in electrical circuits

Back 42

Diodes

Front 43

Diodes are used in electrical power supply circuits primarily as

Back 43

Rectifiers

Front 44

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

Back 44

induction

Front 45

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

Back 45

.93 amps

Hint 45

I = E/R E=VOLTS R= OHMS I =CURRENT

Front 46

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

Back 46

10 volts.

Hint 46

E=I TIMES R