Exam 1

1. the three resistors in the series circuit shown have values of 4 ω, 2 ω, and 5 ω. the total resistance of the circuit is ohms.

a. 9
b. 1
c. 11
d. 40
which unit of electricity does the work in a circuit?

a. coulomb
b. volt
c. ohm
d. ampere
a complete circuit includes all of the following except a/an

a. power source.
b. electrical load.
c. testing meter.
d. protection (fuse).
if a digital meter face shows 0.75 when set to read kω, the reading means ω.

a. 750
b. 75,000
c. 75
d. 7,500
a/an is used to check for variable voltage output from an ignition sensor or computer.

a. analog meter
b. voltmeter
c. logic probe
d. continuity light
an oscilloscope display grid or scale is called a

a. grid.
b. division.
c. graticule.
d. box.
which of the following metals is the best conductor of electricity?

a. tin
b. steel
c. copper
d. brass
which of the following would you be least likely used to locate a short circuit?

a. test light
b. antistatic spray
c. gauss gauge
d. tone generator
as temperature increases, what happens to the conductor?

a. voltage decreases
b. resistance decreases
c. resistance increases
d. resistance remains the same

10. to measure a voltage drop across the switch in the illustration, the digital multimeter leads should be connected across which of the following points?

a. a and b
b. d and e
c. d and f
d. c and d
technician a says that in any circuit, electrical current takes the path of least resistance. technician b says that while this is true in a series circuit, it's not entirely true in a parallel circuit. who is correct?

a. technician a only
b. neither technician a nor technician b
c. both technician a and technician b
d. technician b only
technician a says that analog scopes use an lcd display. technician b says that digital scopes may use a crt display. which technician is correct?

a. technician b only
b. both technician a and technician b
c. technician a only
d. neither technician a nor technician b
a reading of 432 shows on the face of the meter set to the millivolt scale. the reading means volt(s).

a. 4.32
b. 43.2
c. 0.432
d. 4,320
which of the following statements about series circuits is false?

a. the sum of the voltage drops is greater than the source voltage.
b. the same current must flow through each resistor.
c. part of the source voltage is dropped across each resistor.
d. the total resistance is the sum of all the resistors in the circuit.
when using the ohmmeter function of a digital multimeter, the leads are placed in what position relative to the component being tested?

a. line
b. parallel
c. series
d. control
two technicians are discussing fuses. technician a says that current flow should be 20% less than the fuse rating. technician b says that an orange blade fuse will have an amperage rating of 9. which technician is correct?

a. both technician a and technician b
b. technician a only
c. technician b only
d. neither technician a nor technician b
a/an oscilloscope uses a cathode ray tube and displays all voltages.

a. two-channel
b. digital
c. four-channel
d. analog
a three-wire variable resistance potentiometer is used in which type of sensor?

a. knock sensor
b. throttle position
c. barometric pressure
d. manifold absolute pressure
a high-impedance meter

a. has a high internal resistance.
b. has a high amount of current draw.
c. measures a high amount of resistance.
d. can measure high voltage
when using the ohmmeter function of the digital multimeter to check continuity, what does the "ol" in the display mean?

a. dmm internal battery is low
b. ohms lost
c. short circuit
d. over limit
exam 2
a diode with high resistance or an infinite reading in both directions is

a. reverse biased.
b. forward biased.
c. open.
d. shorted.
a diagnostic scan tool connects to the vehicle using the

a. powertrain control module.
b. data link connector.
c. body control module.
d. engine control module.
a/an is a material with four electrons in the valence ring.

a. compound
b. semiconductor
c. conductor
d. insulator
two technicians are discussing how capacitors work. technician a says that, in an open circuit, a capacitor will hold its charge until it's connected to an external circuit. technician b says that theoretically a capacitor will hold its charge indefinitely. who is correct?

a. technician a
b. technician b
c. neither technician a nor b
d. both technicians a and b
a capacitor used for spike protection will normally be placed in

a. either series or parallel to the load or circuit.
b. parallel to the load or circuit.
c. series to the load or circuit.
d. parallel with a resistor in series to the load or circuit.
capacitors are also known as

a. condensers.
b. dielectrics.
c. resistors.
d. diodes.
which terminal of the data link connector does general motors use for class 2 communication?

a. 1
b. 3
c. 2
d. 4