Week 2 Chapter 9, 10 and 11 Test Questions

DS 100

Coupling and heating two dissimilar metals to produce electricity is called _____.

Select one:

a. Electrocoupling

b. Hydrocoupling

c. Thermocoupling

d. Heterocoupling

c. Thermocoupling

Which of these effects is associated with generating electric current from pressure?

Select one:

a. Thermoelectric effect

b. Piezoelectric effect

c. Hydroelectric effect

d. Photovoltaic effect

b. Piezoelectric effect

A fuel cell is an electrochemical device that combines hydrogen and oxygen to produce electricity and _____.

Select one:

a. Acid

b. Heat

c. Alcohol

d. Water

d. water

_____ is the number of lines of magnetic force.

Select one:

a. Flux

b. Flux density

c. Magnetic lines

d. Reluctance

a. Flux

When a(n) _____ core is inserted into the coil of an electromagnet, lines of force easily travel through it.

Select one:

a. Silicon

b. Aluminum

c. Soft iron

d. Copper

c. Soft iron

Which of the following has a high reluctance to magnetic lines of force?

Select one:

a. Water

b. Air

c. Metals

d. Electrolytes

b. Air

Which of these statements is true about self-induction

Select one:

a. There should be a separate permanent magnet to induce electric current.

b. Polarity of self-induced current flow is opposite to the magnetic field.

c. The magnetic field remains constant throughout the process.

d. When the current through the coil is turned off, there would not be any induced voltage.

b. Polarity of self-induced current flow is opposite to the magnetic field.

In a fuel cell, _____ from the hydrogen gas travel(s) through the electrical load.

Select one:

a. Protons

b. Oxygen

c. Methanol

d. Electrons

d. Electrons

What operates along with a fuel cell to remove hydrogen from diesel fuel, natural gas, methanol, or gasoline?

Select one:

a. Step-down transformer

b. Step-up transformer

c. Fuel reformer

d. Relay

c. Fuel reformer

_____ reduces the movement of electrons between the two metals in the cooling system of an engine.

Select one:

a. Electrolyte

b. Coolant

c. Ground node

d. Engine lubrication

b. Coolant

What must be properly connected on a vehicle with an airbag suspension system to remove the buildup of an electrostatic charge?

Select one:

a. Ground straps

b. Nylon washers

c. Aluminum pedestals

d. Static Wicks

a. Ground straps

Which of these components can be used to absorb the static charge while loading and unloading of powdered products in a truck or a trailer?

Select one:

a. Insulator clamp

b. Resistor clamp

c. Grounding clamp

d. Nylon clamp

c. Grounding clamp

What is the significance of triboelectric series?

Select one:

a. It identifies the polarity of the charge.

b. It identifies the tendency of a material to lose or retain electrons

c. It identifies potential difference of the charge.

d. It identifies the number of free electrons in an atom.

b. It identifies the tendency of a material to lose or retain electrons

All of the following materials are likely to lose electrons, EXCEPT:

Select one:

a. Silicon

b. PVC

c. Teflon

d. Leather

c. Teflon

Technician A says the increasing current flow through an electromagnet increases its magnetic field strength. Technician B says that increasing current flow through an electromagnet decreases its magnetic field strength. Who is correct?

Select one:

a. Technician A

b. Technician B

c. Both Technician A and Technician B

d. Neither Technician A nor Technician B

a. technician A

When certain types of _____ are squeezed or bent, electron flow is created according to the piezoelectric effect.

Select one:

a. Metals

b. Plastics

c. Glass

d. Mineral crystals

d. Mineral crystals

Electricity produced under the influence of magnetic fields is known as magnetic _____.

Select one:

a. Flux

b. Reluctance

c. Induction

d. Density

c. Induction

Technician A says two conductors or coils with current flow are required to produce a magnetic field necessary for mutual induction. Technician B says a changing magnetic field in both conductors or coils is used to produce a movement of electrons. Who is correct?

Select one:

a. Technician A

b. Technician B

c. Both Technician A and Technician B

d. Neither Technician A nor Technician B

c. Both Technician A and Technician B

Alternators and generators both operate under what principle?

Select one:

a. Electrolysis

b. Electromagnetic induction

c. Photovoltaic effect

d. Piezoelectric effect

b. Electromagnetic induction

When discussing fuel cells, the voltage from a single cell is approximately how many volts?

Select one:

a. 1.2

b. 5.0

c. 0.7

d. 0.1

c. 0.7

Which of the these is the prime factor that determines the capacity of a battery?

a. Depth in which metals are immersed

b. Distance between the two metals

c. Area of electrode

d. Polarity of metals

c. Area of electrode

What operates along with a fuel cell to remove hydrogen from diesel fuel, natural gas, methanol, or gasoline?

Select one:

a. Step-down transformer

b. Step-up transformer

c. Fuel reformer

d. Relay

c. Fuel reformer

Technician A says a more complex circuit than a series circuit arrangement is a parallel circuit. Technician B says that on paper, the schematic diagram of a parallel circuit resembles a ladder. Who is correct?

Select one:

a. Technician A

b. Technician B

c. Both Technician A and Technician B

d. Neither Technician A nor Technician B

c. Both Technician A and Technician B

Which of the following statements is true?

Select one:

a. Most vehicle circuits are series circuits

b. Properly working connections will have measurable voltage drop across them.

c. A starter motor circuit is an example of a parallel circuit.

d. Amperage in each branch of a parallel circuit with varying resistance is the same.

a. Most vehicle circuits are series circuits

Which of the following is true of 24-volt electrical systems?

Select one:

a. More amperage passes through the system.

b. It uses twice the amperage required by a 12-volt system.

c. Large diameter wiring harnesses are required.

d. The size of components in the system can be reduced.

d. The size of components in the system can be reduced.

What is generally an unwanted by-product of resistance?

Select one:

a. Amperage drops

b. Light

c. Heat

d. Low amperage

c. Heat

The headlights of a vehicle are bright at times and very dull at times. Technician A says this is a result of an intermittent circuit. Technician B says that this is a result of an open circuit. Who is correct?

Select one:

a. Technician A

b. Technician B

c. Both Technician A and Technician B

d. Neither Technician A nor Technician B

a. Technician A

Technician A says short circuits are commonly thought of as the unwanted, high amperage flow between battery power and negative ground. Technician B says the type of fault is better described as a grounded circuit. Who is correct?

Select one:

a. Technician A

b. Technician B

c. Both Technician A and Technician B

d. Neither Technician A nor Technician B

c. Both Technician A and Technician B

What is primary role of a circuit protection device?

Select one:

a. To increase the resistance and reduce the what induced

b. To reduce the number of electrical components used

c. To open the circuit when current flow exceeds maximum threshold

d. To close the circuit when voltages exceed maximum threshold

c. To open the circuit when current flow exceeds maximum threshold

Technician A states that circuit breakers are used in circuits where intermittent current overloads are common. Technician B states that circuit breakers do not requires replacement when trip. Who is correct?

Select one:

a. Technician A

b. Technician B

c. Both Technician A and Technician B

d. Neither Technician A nor Technician B

c. Both Technician A and Technician B

Circuit protection devices are typically designed to _____.

Select one:

a. Prevent excessive voltage

b. Prevent excessive resistance

c. Prevent excessive current

d. Prevent excessive usage

c. Prevent excessive current

Technician A states that a good fuse will have infinite resistance. Technician B states an open fuse will have no or very low resistance. Who is correct?

Select one:

a. Technician A

b. Technician B

c. Both Technician A and Technician B

d. Neither Technician A nor Technician B

d. Neither Technician A nor Technician B

Technician A says current cannot move until the intended path is open. Technician B says an open circuit’s electrical pathway is connected. Who is correct?

Select one:

a. Technician A

b. Technician B

c. Both Technician A and Technician B

d. Neither Technician A nor Technician B

d. Neither Technician A nor Technician B

Technician A says resistance refers to the force in a circuit that impedes or slows the transfer of electrons from one atom to the next. Technician B says resistance will lower amperage, but not voltage, in a circuit in proportion to the amount of resistance. Who is correct?

Select one:

a. Technician A

b. Technician B

c. Both Technician A and Technician B

d. Neither Technician A nor Technician B

a. Technician A

Technician A says a wiper motor circuit is a common example of a combination circuit. Technician B says that, typically, the power and control circuits are in parallel, but the loads are in series. Who is correct?

Select one:

a. Technician A

b. Technician B

c. Both Technician A and Technician B

d. Neither Technician A nor Technician B

a. Technician A

In a _____ circuit, there is only one path for current to flow.

Select one:

a. Combination

b. Series

c. Series-parallel

d. Parallel

b. Series

Which of the following statements is true?

Select one:

a. Most vehicle circuits are series circuits.

b. Properly working connections will have measurable voltage drop across them.

c. A starter motor circuit is an example of a parallel circuit.

d. Amperage in each branch of a parallel circuit with varying resistance is the same.

a. Most vehicle circuits are series circuits.

Which of the following tool or multimeter settings can be used to find points where circuit continuity is lost only if the circuit is not powered?

Select one:

a. Ammeter/Amps

b. Potentiometer/Pot

c. Voltmeter/Volts

d. Ohmmeter/Ohms

d. Ohmmeter/Ohms

How many DC amps are required by a 10-volt inverter to operate a 500-watt electrical load?

Select one:

a. 0.02 DC amps

b. 50 DC amps

c. 5000 DC amps

d. 0.5 DC amps

b. 50 DC amps

Which of the following is the best method for measuring very small amounts of resistance in a circuit with a heavy load?

Select one:

a. Ohms test

b. Amperage test

c. Voltage drop test

d. Wattage test

c. Voltage drop test

Which of the following mathematical equations is obtained when Watt’s and Ohm’s laws are combined?

Select one:

a. Power = Voltage X Amperage

b. Power Voltage²/ Resistance

c. Voltage = Power X Amperage²

d. Voltage = Amperage / Power

b. Power Voltage²/ Resistance

When there is an unintended flow of current between two wires or circuits, it is called a(n) _____.

Select one:

a. Open circuit

b. Closed circuit

c. Unintended path

d. Short circuit

d. Short circuit

Technician A says that open circuits are typically detected using test lights. Technician B says that open circuits can also be detected by multimeters. Who is correct?

Select one:

a. Technician A

b. Technician B

c. Both Technician A and Technician B

d. Neither Technician A nor Technician B

c. Both Technician A and Technician B

A _____ circuit has an unintended path for the flow of electricity.

Select one:

a. Grounded

b. Open

c. Closed

d. Short

d. Short

All of the following are classifications of circuit malfunction, EXCEPT:

Select one:

a. Opened

b. Closed

c. Shorted

d. High resistance

b. Closed

Which of the following circuit breakers must be reset by depressing a reset button?

Select one:

a. Type 1

b. Type 2

c. Type 3

d. Type 4

c. Type 3

A(n) _____ uses field effect transistors (FETs) as the circuit control device.

Select one:

a. Resettable fuse

b. E-fuse

c. Circuit breaker

d. PPT coefficient fuse

b. E-fuse

Technician A states that type 3 circuit breaker remains tripped until the operator manually resets it. Technician B states that type 3 circuit breakers are automatically resetting breakers. Who is correct?

Select one:

a. Technician A

b. Technician B

c. Both Technician A and Technician B

d. Neither Technician A nor Technician B

a. Technician A

_____ fuses are fuses opened by heat and are available in several configurations.

Select one:

a. Resettable

b. E-fuse

c. Thermal

d. Virtual

c. Thermal

Which of the following statements is true when the lead of a test light or common lead of the voltmeter connected to chassis ground?

Select one:

a. A good fuse shows a very high resistance

b. A blown fuse has 0 volts on one side of the fuse

c. A good fuse has battery voltage on only one side of the fuse.

d. A blown fuse has the same voltage on both sides

b. A blown fuse has 0 volts on one side of the fuse

All the following are true about testing for a blown fuse, EXCEPT:

Select one:

a. Turn on the ignition switch

b. A blown fuse will reset.

c. A blown fuse will have voltage on only one side.

d. A good fuse has the same voltage on both sides.

b. A blown fuse will reset.

During the test of a circuit device, the power is available only to the circuit protection device and not to the load. Technician A states that this is an indication of an open fuse. Technician B states that this is an indication of a good fuse. Who is correct?

Select one:

a. Technician A

b. Technician B

c. Both Technician A and Technician B

d. Neither Technician A nor Technician B

a. Technician A

What types of switches are sued for gases or liquids?

Select one:

a. Temperature-sensitive

b. Pressure-sensitive

c. Momentary contact

d. Toggle

b. Pressure-sensitive

What type of switches uses an angled lever having an internal spring-loaded mechanism to rapidly switch into its latch position?

Select one:

a. Momentary contact

b. Pressure

c. Toggle

d. Proximity

c. Toggle

Vehicle horn switches are examples of _____ switches.

Select one:

a. Toggle

b. Magnetic

c. Momentary contact

d. Rotary

c. Momentary contact

Which switch uses a unique polymer material and switches off almost all current in an open state?

Select one:

a. Bimetal

b. Spring-loaded metal piston

c. Positive Temperature Coefficient (PTC)

d. Magnetic reed

c. Positive Temperature Coefficient (PTC)

Switches with inputs to an ECM are categorized as _____.

Select one:

a. Push and pull

b. Pull up and pull down

c. Push up and pull down

d. Push up and push down

b. Pull up and pull down

Colored bands around the resistor identify its numerical resistance in _____.

Select one:

a. Volts

b. Watts

c. Ohms

d. Farads

c. Ohms

Technician A says that electromechanical relays are practical for upfitters installing audio equipment, security alarms, and lighting. Technician B says newer inexpensive, solid-state relays are replacing electromechanical relays in the aftermarket repair and modification industry.

Select one:

a. Technician A

b. Technician B

c. Both Technician A and Technician B

d. Neither Technician A nor Technician B

a. Technician A

What do pull-in-type solenoids use when a high amount of force is required for moving devices such as a fuel-injection pump shut-off lever?

Select one:

a. A permanent magnet

b. Thick wire windings

c. Two electromagnetic coils

d. A soft iron core

c. Two electromagnetic coils

When replacing a defective switch, what is necessary characteristic of the new switch?

Select one:

a. Greater number of poles and throws than the original switch

b. The same number of positions as the original switch

c. Identical cover plate as the original switch

d. Greater current ratings than the original switch

b. The same number of positions as the original switch

How many amps can be switched by an ISO relay?

Select one:

a. As such as 15 amps in a 12-volt system

b. As much as 25 amps in a 12-volt system

c. As much as 35 amps in a 12-volt system

d. As much as 45 amps in a 12-volt system

c. As much as 35 amps in a 12-volt system

Switches can be categorized by all the following criteria, EXCEPT:

Select one:

a. Number of input and output terminals

b. Device to be controlled

c. Operating position

d. Mode of operation (manual/automatic)

b. Device to be controlled

What common contact arrangement is equivalent to two SPDT sets of contacts controlled by a single mechanism?

Select one:

a. Double pole double throw

b. Single pole single throw

c. Double pole single throw

d. Single pole double throw

a. Double pole double throw

Which of the following is correct concerning switches?

Select one:

a. Simple switches are categorized by the number of input and output terminals they have

b. Input terminals are called throws

c. Output terminals are called poles.

d. The simplest switch is called DPDT

a. Simple switches are categorized by the number of input and output terminals they have

What type of switch is used for a transmission range selector in a vehicle that involves choices such as park, reverse, and forward drive positions?

Select one:

a. DPST

b. DPDT

b. SPDT

d. MPMT

d. MPMT

What mechanism is used to ensure that a pressure-sensitive switch latches into position regardless of the operator speed?

Select one:

a. Slow-acting mechanism

b. Spring-loaded mechanism

c. Momentary-contact mechanism

d. Over-center mechanism

d. Over-center mechanism

_____ are temperature-sensitive variable resistors.

Select one:

a. Thermistors

b. Rheostats

c. Fixed resistors

d. Potentiometers

a. Thermistors

Magnetic reed switches are _____ switches.

Select one:

a. Momentary contact

b. Toggle

c. Manual

d. Pressure-sensitive

a. momentary contact

When discussing the operation of pressure-sensitive switches, Technician A says an elastic diaphragm is best used for low-pressure gas switching. Technician B says constant cycling may weaken and break the diaphragm over time. Who is correct?

Select one:

a. Technician A

b. Technician B

c. Both Technician A and Technician B

d. Neither Technician A nor Technician B

c. Both Technician A and Technician B

Which of the following is NOT correct concerning smart switches?

Select one:

a. A smart switch provides input signals to electronic control modules.

b. Because switches can be in only one of two states, the switch inputs are binary inputs.

c. The switch can provide data such as whether a device or system is on or off, high or low, open or closed, up or down, and so on

d. The switch can provide diagnostic information if fault with the device exists.

d. The switch can provide diagnostic information if fault with the device exists.

What does a smart switch use to differentiate a closed or open switch from shorting, grounding, or other circuit problems?

Select one:

a. Capacitors

b. Solenoids

c. Resistors

d. Transistors

c. Resistors

When discussing the operation of multiplex switches, Technician A says that several switches are connected in switch packs such as those used by the cruise control. Technician B says that the switches use resistors of the same value placed in series-parallel arrangement. Who is correct?

Select one:

a. Technician A

b. Technician B

c. Both Technician A and Technician B

d. Neither Technician A nor Technician B

a. Technician A

_____ switches use resistors in series and parallel and can fusion well as digital inputs to electronic control systems.

Select one:

a. Proximity

b. Smart

c. Touch-sensitive

d. Push button

b. Smart

_____ have only two terminals, a fixed input and variable output.

Select one:

a. Thermistors

b. Rheostats

c. Fixed resistors

d. Potentiometers

b. Rheostats

Which statement is true when discussing rheostats and potentiometers?

Select one:

a. Potentiometers are variable resistors, but with two connections

b. Rheostats vary current flow by passing current through a long, resistive, tightly coiled wire

c. In potentiometers a wiper-like contact sliding over the coil supplies a variable current output

d. Rheostats perform a voltage-dividing function

b. Rheostats vary current flow by passing current through a long, resistive, tightly coiled wire

Which of the following varies the current flow by passing current through a long, resistive, tightly coiled wire?

Select one:

a. Thermistor

b. Rheostat

c. Smart switch

d. Fixed resistor

b. Rheostat

Technician A says rheostats and potentiometers are not used in today’s commercial vehicles. Technician B says magnetic reed sensors are not used in today’s commercial vehicles. Who is correct?

Select one:

a. Technician A

b. Technician B

c. Both Technician A and Technician B

d. Neither Technician A nor Technician B

d. Neither Technician A nor Technician B

Throttle pedal position sensors are a common application for _____.

Select one:

a. Potentiometers

b. Thermistors

c. Fixed resistors

d. Rheostats

a. Potentiometers

Which of the following is NOT correct concerning magnetic switches?

Select one:

a. Magnetic or “mag” switches are identical in function to relays, except that they switch even larger amounts of current.

b. Magnetic switches are classified only as intermittent duty service.

c. When switching heavy amounts of current, such as to the starter motor solenoid, available battery voltage can drop.

d. Low available voltage will reduce the magnetic field strength in the switch, causing the relay to “chatter” as it rapidly engages and disengages when the electrical system voltage drops.

b. Magnetic switches are classified only as intermittent duty service.

Technician A says one important applications of diodes is to suppress high-voltage spikes caused by self-induction in coils. Technician B says the rapid collapse of a coil’s magnetic field induces high-voltage current in the same direction of the flowing current that originally produced the magnetic field. Who is correct?

Select one:

a. Technician A

b. Technician B

c. Both Technician A and Technician B

d. Neither Technician A nor Technician B

a. Technician A

What do relays use to suppress voltage spikes induced when power is disconnected from the coil?

Select one:

a. Diodes

b. Capacitors

c. Magnetic switches

d. Solenoids

a. Diodes

The hold in windings of a solenoid is best described as which of the following?

Select one:

a. Heavier diameter than pull-in windings

b. Narrower diameter as pull-in windings

c. Lower resistance as pull-in windings

d. Same as pull-in windings

c. Lower resistance as pull-in windings

Technician A says solenoids are devices with a fixed core that cover current flow into mechanical movement. Technician B says solenoids are sued with heater motors to engage the drive mechanism while switching heavy current into the motor. Who is correct?

Select one:

a. Technician A

b. Technician B

c. Both Technician A and Technician B

d. Neither Technician A nor Technician B

d. Neither Technician A nor Technician B

Technician A says solenoids may use a spring to return the actuator to a resting position.

Technician B says adjustment to solenoid travel is crucial. Who is correct?

Select one:

a. Technician A

b. Technician B

c. Both Technician A and Technician B

d. Neither Technician A nor Technician B

c. Both Technician A and Technician B

In pull-type solenoids, a(n) _____ pulls a soft iron core into the coil.

Select one:

a. Electromagnet

b. Electrical insulator

c. Permanent magnet

d. magnetic switch

a. Electromagnet

After conducting a visual inspection, what indicator tells the technician that there is a fault with a switch?

a. Discoloration

b. A fault code

c. Difference in brightness of the test light at the pole and throw

d. No resistance between a pole and throw

a. Discoloration

Switches can be checked by all of the following devices, EXCEPT:

Select one:

a. Ohmmeters

b. Voltmeters

c. Ammeters

d. Test lights

c. Ammeters

When checking a solenoid, what indicates a problem?

Select one:

a. No difference between supply voltage to the solenoid and chassis voltage

b. Open windings

c. Different resistance between hold-in and pull-in windings

d. Intact rubber boots sealing the linkage mechanism

b. Open windings

While discussing the testing procedures for relays, Technician A says that if a relay does not click or activate a circuit it is intended to operate, it can be comprehensively testing using a voltmeter, test light, or ohmmeter. Technician B says that electronic relay testers do not require a voltage source. Who is correct?

Select one:

a. Technician A

b. Technician B

c. Both Technician A and Technician B

d. Neither Technician A nor Technician B

a. Technician A