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Chapter 18 Electrical Instrumentation

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

A gauge in which three field coils are wound in series, with a coil at minimum reading, one at maximum reading, and one between the two.

a)

3 coil gauge

b)

2 coil gauge

c)

bipolar stepper gauge

d)

tripolar stepper gauge

2.

A display screen that uses two transparent plates, one of which is electrically charged.

a)

liquid crystal display

b)

capacitance touch screen

c)

back lit LED

d)

digital touch screen

3.

Speedometers can be calibrated using __________.

a)

dip switches

b)

flip switches

c)

data bus reprogramer

d)

gauge flashing

4.

A sequence in which the warning lights for several brief seconds with the key on and engine off or during key-on engine cranking.

a)

prove-out sequence

b)

blink codes

c)

self diagnostics

d)

driver alert system

5.

A gauge in which two dissimilar pieces of metal are bonded together and expand at different rates when heated, thereby converting the heating effect of electricity into mechanical movement.

a)

2 coil gauge

b)

3 coil gauge

c)

bipolar stepper gauge

d)

bimetallic gauge

6.

A display screen composed of two flexible, transparent sheets lightly coated with an electrically conductive yet slightly resistive material.

a)

liquid crystal display

b)

resistive touch screen

c)

back lit LED

d)

capacitance touch screen

7.

A method of providing fault code data for a specific system that involves counting the number of flashes from a warning lamp and observing longer pauses between the light blinks.

a)

blink codes

b)

code reader

c)

prove out sequence

d)

driver alert system

8.

A device fitted to a vehicle to record various pieces of information, such as time, speed, rest periods, and distance traveled by each of the vehicle’s drivers.

a)

tachograph

b)

tachometer

c)

speedometer

d)

odometer

9.

A type of electromagnetic gauge that moves a pointing needle directly proportional to current flow through an electromagnet attached to the pointer.

a)

D’Arsonval gauge

b)

bimetallic gauge

c)

2 coil gauge

d)

bipolar stepper gauge

10.

a variable reluctance sensor produces ______________signal.

a)

an a/c voltage

b)

a direct voltage

c)

a square wave

d)

a pulse width

11.

A variable inductance sensor would be used in all the following systems EXCEPT?

a)

speedometer

b)

ABS

c)

tachometer

d)

crankshaft position

12.

A flexible bellows would be used in which of the following gauge circuits?

a)

oil pressure

b)

temperature

c)

fuel level

d)

coolant level

13.

How much voltage is supplied to non-computerized gauges and sending units?

a)

5 to 10 volts

b)

3 to 7 volts

c)

12 to 14.2

d)

8 to 10

14.

All of the following could require speedometer calibration EXCEPT?

a)

change in tire height

b)

change in axle ratio

c)

change in tire diameter

d)

change in tire width

15.

Digitally driven, networked, or intelligent gauges use a ___________.

a)

J1939 data bus

b)

J1708 data bus

c)

instrument voltage regulator

d)

3 coil bipolar stepper

16.

Opening or closing the sending unit circuit is a way to test ____________.

a)

resistive gauges

b)

pressure sensing gauges

c)

networked gauges

d)

intelligence gauges

17.

If a fuel gauge reads full no matter what the fuel level is, the problem is most likely___________.

a)

loss of sending unit ground

b)

missing float on lever

c)

un-calibrated gauge

d)

grounded sending circuit wire

18.

All the gauges move from minimum to maximum and back to minimum when the key is first moved to the on position. This is caused by ___________________.

a)

a defective ground to the instrument cluster

b)

a defective instrument voltage regulator

c)

a gauge function sweep

d)

a shorted sending unit

19.

a low oil pressure warning light would use which of the following?

a)

normally closed pressure switch

b)

normally open pressure switch

c)

normally open sending unit

d)

normally closed sending unit

20.

A fuel gauge circuit would use which of the following?

a)

rheostat variable resistor

b)

potentiometer variable resistor

c)

bellows type variable resistor

d)

thermal slide variable resistor