Deck 2: Basic Theories Special Tools and Procedures

Question 1

All of the following concerning voltage drop are true EXCEPT:

A) All of the voltage from the source must be dropped before it returns to the source.
B) Corrosion is not a contributor to voltage drop.
C) Voltage drop is the conversion of electrical energy into another energy form.
D) Voltage drop can be measured with a voltmeter.

Answer 1

B

Question 2

All of the following concerning voltage are true EXCEPT:

A) Voltage is the electrical pressure that causes electrons to move.
B) Voltage will exist between any two points in a circuit unless the potential drops to zero.
C) Voltage is A × R.
D) In a series circuit, voltage is the same at all points in the circuit.

Answer 2

D

Question 3

In a series circuit:

A) Total resistance is the sum of all of the resistances in the circuit.
B) Total resistance is less than the lowest resistor.
C) Amperage will increase as more resistance is added.
D) All of these choices.

Answer 3

A

Question 4

Wattage is:

A) A measure of the total electrical work being performed per unit of time.
B) Expressed as P = R × A.
C) All of these choices.
D) None of these choices

Question 5

Which statement about electrical currents is correct?

A) Alternating current can be stored in a battery.
B) Alternating current is produced from a voltage and current that remain constant and flow in the same direction.
C) Direct current is used for most electrical systems on the automobile.
D) Direct current changes directions from positive to negative.

Question 6

In a series circuit which of the following statements is correct ?

A) The circuit amperage will increase as more resistance is added.
B) The total resistance is the sum of all the resistances in the circuit.
C) The total resistance is less than the lowest resistor.
D) All of these choices.

Question 7

Three 10-ohm resistors are wired in parallel. What is the total resistance ?

A) 30 ohms
B) 10 ohms
C) 33 ohms
D) 3.3 ohms

Question 8

All of the following statements are true EXCEPT:

A) If the resistance increases and the voltage remains constant, the amperage will increase.
B) Ohm's law can be stated as A = V ¸ R.
C) If voltage is increased, amperage will increase.
D) An open circuit does not allow current flow.

Question 9

Which of the following methods can be used to form an electrical current?

A) Magnetic induction.
B) Chemical reaction.
C) Heat.
D) All of these choices.

Question 10

What will adding resistance to a series circuit cause ?

A) More current to flow.
B) Less current to flow.
C) The total resistance to go down.
D) None of these choices.

Question 11

What is voltage drop ?

A) Voltage used up when pushing current through a resistance.
B) Current used to go through a resistance.
C) Electrons used to go through a resistance.
D) All of these choices.

Question 12

According to Ohm's Law, what is the resistance when 1 volt pushes 1 ampere of current through a conductor ?

A) 0 ohm
B) 1 ohm
C) 1 watt
D) 1 coulomb

Question 13

Which of the following statements is correct?

A) An insulator is capable of supporting the flow of electricity through it.
B) A conductor is not capable of supporting the flow of electricity.
C) All of these choices.
D)None of these choices.

Question 14

Induction:

A) Is the magnetic process of producing a current flow in a wire without any actual contact to the wire.
B) Exists when the magnetic field or the conductor is in motion.
C) All of these choices.
D) None of these choices

Question 15

What is the amperage flowing through a 36 watt bulb in a 12 volt circuit ?

A) 432 amps
B) 3 amps
C) 12 amps
D) 0.3 amps

Question 16

When a 12-volt test light is touched into a connector it lights. Following the wire toward the load, the next connector is probed with no light. What does this indicate?

A) Nothing is wrong.
B) An open load.
C) An open before the first connector.
D) An open circuit between the two points.

Question 17

What does the sum of the voltage drops in a series circuit equal ?

A) The amperage
B) The resistance
C) The source voltage
D) The shunt circuit voltage

Question 18

How much resistance is in a 12 volt circuit that is drawing 4 amperes?

A) )333 ohms
B) 3 ohms
C) 4.8 ohms
D) 48 ohms

Question 19

Which of the following would be the best tool to use to capture a voltage glitch ?

A) A standard digital multimeter.
B) An analog digital multimeter.
C) A digital storage oscilloscope.
D) A logic probe.

Question 20

All of the following concern the use of jumper wires are true except:

A) The jumper should be fused.
B) The jumper wire can be used to by-pass a switch.
C) The jumper wire can be used to by-pass the load device.
D) It can be used to supply an alternate ground circuit.

Question 21

Which of the following statements is most correct?

A) Voltage drop testing tests the circuit while under load.
B) An ammeter must be connected in parallel to the load.
C) An ohmmeter tests the circuit under a simulated load.
D) An insulation meter is used to measure high voltage.

Question 22

A test light is ideal for checking for voltage on a digital circuit with low-current.

Question 23

Technical service bulletins (TSB's) should only be used if a system fault cannot be determined.

Question 24

A scan tool is used to measure voltage drops in the vehicles electrical system.

Question 25

A digital multimeter is faster at detecting voltage changes in a circuit than a digital storage oscilloscope.

Question 26

The service performed to repair a vehicle should be recorded on the work order for warranty purposes.

Question 27

The amount of resistance in a circuit may be measured using an ammeter.

Question 28

A 10% duty cycle indicates that the load is turned on 1/10th of the time.

Question 29

An individual with at least 2 years of field experience who passes a select ASE-certification examination becomes certified in that test area.

Question 30

An analog meter is often used to test computer controlled circuits.

Question 31

Most technicians' today use analog meters on computer controlled circuits.

Question 32

A work order is only a guide for the technician and not a legal binding document.

Question 33

A test light should not be used on computer controlled circuits.

Question 34

A manufacturer's service information will usually be the best source of correct procedures when servicing a vehicle.