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Use material from Unit Four, and Chapter 8 and Chapter 15,
Auto
Fundamentals - Stockel,
Stockel and Johanson, to complete the following questions.
1. The engine control system uses a reference voltage
from the computer to operate
certain sensors.
What is the value of this voltage?
a. 2
b. 3
c. 5
d. 12
2. The engine coolant temperature sensor provides engine
temperature readings
to the computer. What
type of sensor is this?
a. potentiometer
b. thermistor
c. resistor
d. transducer
3. The ignition pickup is a Hall Effect switch in the
distributor. What information does
this send to the computer?
a. the amount of dwell
b. the number of cylinders
c. the voltage output of the distributor
d. crankshaft position
4. The microcomputer in the PCM controls acutators by
a. amplifying input voltage
b. supplying electrical current
c. controlling output drivers
d. supplying reference voltage
5. The three principle stages of microcomputer operation are
a. input, processing, output
b. input, output, actuation
c. input, processing, feedback
d. input, output, feedback
6. The throttle position sensor is a type of
a. thermistor
b. voltage generating sensor
c. potentiometer
d. magnetic sensor
7. Analog to digital conversion is an example of
a. input retrieval
b. input conditioning
c. information storage
d. information retrieval
8. The exhaust gas oxygen sensor is a type of
a. magnetic sensor
b. potentiometer
c. thermistor
d. voltage generating sensor
9. ROM is a type of memory which is used to
a. store information temporarily
b. store information permanently
c. store information from KAM
d. collect information from sensors
10. If an automotive computer is disconnected from the vehicle
battery, information
in KAM (keep alive memory)
will be
a. erased from memory
b. stored in ROM
c. retained in memory
d. retained in memory for a short time
11. Most on-board computers are located
a. on the air cleaner
b. in the passenger compartment
c. in the engine compartment
d. on the engine
12. Computer processing takes place in the
a. output driver
b. input sensor
c. electronic control unit
d. all of the above
13. Which of the following describes a signal producing sensor?
a. contains a resitance unit
b. modifies a reference voltage from the ECU
c. generates its own voltage signal
d. contains a solenoid coil
14. Which of the following changes as engine operating conditions change?
a. PROM
b. RAM
c. EPROM
d. ROM
15. All of the following are stages of computer processing EXCEPT
a. processing
b. input
c. inversion
d. output
16. A switching sensor has two positions. These are
a. low temperature and high temperature
b. low frequency and high frequency
c. on and off
d. low voltage and high voltage
17. When an electric device needs more current flow than the
computer circuits
can handle, it may be
controlled through a
a. resistor
b. relay
c. integrated circuit
d. capacitor
18. A relay is a
a. symbol that represents change in current direction
b. combination of a switch and electromagnet
c. device that gives motion to the wiper motor
d. combination of a source and a load
19. The analog display uses a
a. numeric readout
b. flashing light
c. bar graph
d. needle and scale
20. A relay consists of two circuits, a ________ circuit and a _________ circuit.
a. input, actuator
b. control, power
c. output, control
d. input, ground
21. Which is not a type of information stored in ROM?
a. strategy
b. lookup tables
c. sensor input
d. none of the above
22. Technician A says that some sensors modify a voltage signal.
Technician B says
that some sensors generate
a voltage. Who is right?
a. A only
b. B only
c. both A and B
d. neither A nor B
23. Which of the following can amplify an electrical signal?
a. diode
b. thermistor
c. resistor
d. transistor
24. On a transistor, what is the "control" connection?
a. collector
b. base
c. emitter
d. all of the above
25. The simplest digital input is a
a. signal generator
b. thermistor
c. switch
d. potentiometer
KEY - UNIT FOUR