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Electrical Chapter 20 sensors

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

A sensor that does not use a current supplied by the ECM to operate.

a)

passive sensor

b)

active sensor

c)

pull-up sensor

d)

pull-down sensor

2.

A sensor used to measure rotational speed, including wheel speed, vehicle speed, engine speed, and camshaft and crankshaft position.

a)

variable reluctance sensor

b)

active sensor

c)

rotational inductance sensor

d)

rotational speed sensor

3.

A switch connected between the ECM and a battery positive.

a)

pull-down sensor

b)

pull-up sensor

c)

active sensor

d)

passive sensor

4.

A circuit used for safety reasons that is used to verify throttle position.

a)

idle validation switch

b)

throttle position sensor

c)

rev limiter circuit

d)

manifold absolute pressure sensor

5.

A sensor that detects oxygen ions originating from nitric oxide from among the other oxygen ions present in the exhaust gas.

a)

NOX sensor

b)

oxygen sensor

c)

soot sensor

d)

ammonia sensor

6.

A switch connected between the ECM and a negative ground current potential.

a)

pull-down switch

b)

pull-up switch

c)

rheostat

d)

potentiometer

7.

A precisely regulated voltage supplied by the ECM to sensors; the value is typically 5 VDC, but some manufacturers use 8 or 12 volts.

a)

Vref

b)

IVR

c)

digital

d)

feedback

8.

A sensor that uses a current supplied by the ECM to operate.

a)

active sensor

b)

passive sensor

c)

hall effect sensor

d)

variable reluctance sensor

9.

A temperature-sensitive variable resistor commonly used to measure coolant, oil, fuel, and air temperatures.

a)

thermistor

b)

transistor

c)

pyrometer sensor

d)

thermal potentiometer

10.

A variable resistor with three connections— one at each end of a resistive path, and a third sliding contact that moves along the resistive pathway.

a)

rheostat

b)

potentiometer

c)

passive sensor

d)

digital inverter

11.

A sensor commonly used to measure the rotational speed of a shaft; they have the advantage of producing a digital signal square waveform and have strong signal strength at low shaft rotational speeds.

a)

pulse width modulation

b)

hall effect

c)

variable inductance

d)

variable reluctance

12.

variable capacitance and strain gauge restistive would be types of ________________ sensors.

a)

pressure

b)

potentiometer

c)

rheostat

d)

temperature

13.

All of the following are correct concerning hall effect sensors EXCEPT?

a)

produce digital signal

b)

are superior for low speed

c)

are single wire

d)

can be used for position

14.

All of the following are correct concerning voltage generators EXCEPT?

a)

a NOX sensor is a voltage generator

b)

voltage generators produce direct current

c)

voltage generators can produce a frequency signal

d)

variable reluctance sensors are voltage generators

15.

An ammonia sensor would be located _____________?

a)

after the scr

b)

scr inlet

c)

decomposition tube

d)

urea doser outlet

16.

On a diesel engine, the MAF sensor is used to _____________.

a)

help monitor EGR

b)

help obtain stoichiometric ratios

c)

determine turbo boost

d)

measure intake air temperature

17.

Which of the following is correct concerning sensors that use Vref?

a)

they have 3 wires

b)

they are pull-down sensors

c)

are grounded through the sensor body

d)

do not provide a feedback signal voltage

18.

A ZVR wire can also be called a _____________ by some manufacturers.

a)

ground return

b)

Vref

c)

signal

d)

supply power in

19.

thermistors are __________ type devices?

a)

variable resistor

b)

piezo resistive

c)

pressure sensing

d)

on-off digital producing

20.

Which of the following is correct related to MAF sensors?

a)

measures air density

b)

measures air temperature

c)

produces analog signal

d)

is a voltage generator