40

Question 1

an electrical conductor is an element with blank electrons on its power orbit

Answer 1

less than 4

Question 2

carbon and silicon are examples of blank

Answer 2

semiconductors

Question 3

which unit of electricity does the work in a circuit

Answer 3

ampere

Question 4

as temperatures increases

Answer 4

the resistance of the conductor increases

Question 5

technician a says that a two wire variable resistor is called a rheostat technician b says that a three wire variable resistor is called a potentiometer

Answer 5

both

Question 6

creating electricity by exerting force on a crystal is used in which type of sensor

Answer 6

knock sensor

Question 7

a potentiometer a

three wired variable resistance is used in which type of sensor

Answer 7

throttle sensor

Question 8

if a insulated wire rubbed through a part of the insulation and the wire conductor touched the steel body of a vehicle the type of failure would be called a

Answer 8

short to ground

Question 9

if two insulated wires were to melt together where the copper conductors touched each other the type of failure would be

Answer 9

short to voltage

Question 10

if 12 volts are being applied to a resistance of 3ohms blank amperes will flow

Answer 10

4 amps

Question 11

how many watts are consumed by a light bulb if 1.2 amperes are measured when 12 volts are applied

Answer 11

14.4

Question 12

how many watts are consumed by a starter motor if it draws 150 amperes at 10 volts

Answer 12

1500 watts

Question 13

high resistance on an electrical circuit can cause

Answer 13

all of these
dim light
slow motor operation
clicking of relays

Question 14

if the voltage increases in a circuit what happens to the current (amperes) if the resistance remains the same

Answer 14

increases

Question 15

if 200 amperes flow from the positive terminal of a battery and operate the starter motor how many amps will flow back to the negative terminal of the battery

Answer 15

200 amperes

Question 16

what is the symbol for the voltage used in calculations

Answer 16

E

Question 17

which circuit failure is most likely to cause the fuse to blow

Answer 17

short to ground

Question 18

the amperage in a series circuit is

Answer 18

the same everywhere in the circuit

Question 19

the sum of the voltage drop in a series circuit equals the

Answer 19

source voltage

Question 20

if the resistance and the voltage are known what is the formula for finding the current amperes

Answer 20

I=E/R

Question 21

a series circuit has three resistors of 4 ohms each the voltage drop across each resistor is 4 volts technician A says that the source voltage is 12 volts technician B says that the total resistance is 18 ohms which technician is correct

Answer 21

A only

Question 22

if a12 volt battery is connected to a series circuit with three resistors of 2 ohms 4 ohms and 6 ohms how much current will flow thru the circuit

Answer 22

1 amp

Question 23

a series circuit has 10 ohm a third bulb is added in series technician A says that the three bulbs will be dimmer than when only two bulbs were in the circuit technician B says that the current in the circuit will increase which technician is correct

Answer 23

A only

Question 24

technician A says that the sum of the voltage drops in a series circuit should equal the source voltage technician B says that the current (amperes) varies depending on the value of the resistance in a series circuit which technician is correct

Answer 24

A only

Question 25

two bulbs are connected in parallel to a12 volt battery one bulb has a resistance of 6 ohms and the other bulb has a resistance of 2 ohms technician A says that only the 2 ohm bulb with the least resistance and no current will flow thru the 6 ohm bulb technician B says that the 6 ohm bulb will be dimmer than the 2 ohm bulb which technician is correct

Answer 25

B only

Question 26

calculate the total resistance and current in a parallel circuit with the three resistors of 4 8 16 ohms using any of the five methods

Answer 26

2.3 ohms (5.3 amperes)

Question 27

inductive ammeters work because of what principle

Answer 27

a magnetic field surrounds any wire carring a current

Question 28

a voltmeter should be connected to the circuit being tested

Answer 28

in parallel

Question 29

an ohmmeter should be connected to the circuit or component being tested

Answer 29

only when no power is flowing (electrically open circuit)

Question 30

a high impedance meter

Answer 30

has a high internal resistance

Question 31

a meter is set to read DC volts on the 4 volts scale the meter leads are connected at a12 volt battery the display will read

Answer 31

OL

Question 32

what could happen if the meter leads were connected to the positive and negative terminals of the battery while the meter and leads were set to read amperes

Answer 32

could blow am internal fuse or damage the meter

Question 33

the highest amount of resistance that can be read by the meter set to the 2k ohm scale is

Answer 33

2000 ohms

Question 34

if a digital meter face shows 0.93 when set to read k ohm the reading means

Answer 34

930 ohms

Question 35

a reading of 432 shows on the face of the meter set to the millivolt scale the reading means

Answer 35

0.432 volt

Question 36

technician A says that magnetic lines of force can be seen by placing iron filings on a piece of paper and then holding them over a magnet technician B says that the effects of magnetic lines of force can be seen using a compass which technician correct

Answer 36

both

Question 37

unlike magnetic poles blank and like magnetic poles blank

Answer 37

attract repel

Question 38

the conventional theory for current flow is being used to determine the direction of magnetic lines of force technician A says that the left hand rule shoulder be used technician B says that the right hand rule should be used which technician is correct

Answer 38

technician B

Question 39

technician A says that a relay is a electromagnetic switch technician B says that a solenoid uses as movable core which technician correct

Answer 39

both

Question 40

two technicians are discussing electromagnetic induction technician A says that there induced voltage can be increased if the speed is increased between the conductor and the magnetic lines of force technician B says that the induced voltage can be increased by increasing the strength of the magnetic field which technician is correct

Answer 40

both

Question 41

an ignition coil is a example of

Answer 41

step up transformer

Question 42

an ignition coil operates using the principle(s) of

Answer 42

all of the above electromagnetic induction self induction mutual induction

Question 43

electromagnetic interference can be reduced by using a

Answer 43

all of the above resistance capacitor coil

Question 44

a magnetic field strength is measured in

Answer 44

ampere-turns

Question 45

two technicians are discussing ignition coils technician A says that some ignition coils have a primary and secondary windings electrically connected technician B says that some coils have totally separate primary and secondary windings that are not electrically connected

Answer 45

both