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1. The throttle position sensor is a type of
a. potentiometer
b. voltage generating
sensor
c. magnetic sensor
d. thermistor
2. Which of the following will be erased if the battery
negative cable is removed?
a. ROM
b. RAM
c. PROM
d. EPROM
3. The amount of fuel supplied by an injector is determined by
a. the computer and sensor
input signals
b. the fuel pressure
regulator
c. the injector pulse
width
d. all of the above
4. Technician A says that at 300 mv output from an 02 sensor
indicates a rich mixture. Technician B says that .8
volts
indicates a lean mixture. Who is right?
a. A only
b. B only
c. both A and B
d. neither A nor
B
5. The 02 sensor is an
a. output device
b. input device
c. electronic control
device
d. all of the above
6. The microcomputer in the ECA controls actuators by:
a. amplifying input voltage
b. supplying electrical
current
c. supplying reference
voltage
d. controlling output
drivers
7. Which of the following can the computer control?
a. air/fuel ratio
b. spark advance
c. spark timing
d. all of the above
8. Technician A says that the 02 sensor is a variable voltage
producing device. Technician B says the 02 sensor is
located in the intake manifold. Who is
right?
a. A only
b. B only
c. Both A and B
d. Neither A nor
B
9. Which of the following describes a signal producing sensor?
a. modifies a reference
voltage from the ECU
b. generates its own
voltage signal
c. contains a resistance
unit
d. contains a solenoid
coil
10. Which is not a type of information stored in ROM?
a. look-up
tables
b. strategy
c. sensor
input
d. none of
the above
11. ROM is a type of memory which is used to:
a. collect
information from sensors
b. store
information temporarily
c. store
information permanently
d. store
information from KAM
12. The 02 sensor
a. senses
the amount of oxygen entering the engine
b. usually
produces a voltage of 0-1 volts
c. senses
the amount of pollutants in the exhaust
d. produces
higher voltages with leaner mixtures
13. If an automotive microcomputer is disconnected from the
vehicle battery, information in KAM (Keep Alive
Memory) will
a. be stored in
ROM
b. be retained
in memory
c. be erased from
memory
d. be retained
in memory for a short period
14. The analog display uses a
a. needle
and scale
b. flashing
light
c. bar graph
d. numeric
readout
15. All of the following are stages of computer processing
except:
a. input
b. processing
c. output
d. inversion
16. The Hall Effect sensor provides a(n) _____ signal for the
computer.
a. analog
b. digital
c. mechanical
d. all of
the above
17. The three principal stages of microcomputer operation are:
a. input,
output, feedback
b. input,
processing, output
c. input,
output, actuation
d. input,
processing, feedback
18. A switching sensor has two positions. These are
a. low temperature
and high temperature
b. low voltage
and high voltage
c. on and
off
d. low frequency
and high frequency
19. Analog to digital conversion is an example of:
a. input
conditioning
b. information
storage
c. input
retrieval
d. information
retrieval
20. Which of the following changes as engine operating
conditions change?
a. EPROM
b. ROM
c. RAM
d. PROM
21. The simplest digital input is a
a. signal
generator
b. thermistor
c. potentiometer
d. switch
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. Computer processing takes place in the
a. output
driver
b. input
sensor
c. electronic
control unit
d. all of
the above
24. The EEC IV system uses a reference voltage from the ECA to
operate the sensors. What is
the value of this reference
voltage?
a. 12 volts
b. 3 volts
c. 2 volts
d. 5 volts
25. Technician A says that RAM is temporary storage. Technician
B says that ROM is temporary storage in a computer.
Who is
right?
a. A only
b. B only
c. either
A or B
d. neither
A nor b