Week 6, Chapter 9 - Electronic Powertrain Control

Question 1

What unit of electricity is used as a signal for a computer?

Answer 1

Volt

Question 2

What are the four basic computer functions?

Answer 2

Input, processing, storage and output

Question 3

All OBD II vehicles use what type of read-only memory?

Answer 3

EEPROM

Question 4

the “brain” or “heart” of the computer is the ________.

Answer 4

CPU

Question 5

Computer processing speed is measured in ________.

Answer 5

Baud rate

Question 6

The SAE term for the vehicle computer is ________.

Answer 6

PCM

Question 7

What two things can a vehicle computer actually perform (output)?

Answer 7

Turn something on or turn something off

Question 8

Analog signals from sensors are changed to digital signals for processing by the computer through which type of circuit?

Answer 8

AD converter

Question 9

Adding or subtracting fuel is known as ________.

Answer 9

Fuel trim

Question 10

A ________ is a variable resistor with two outputs.

Answer 10

Rheostat

Question 11

The number of times an oxygen sensor changes voltage from high to low in 1 second is know as what?

Answer 11

Cross counts

Question 12

True or false?

The resistance of a PTC (positive temperature coefficient) thermistor INCREASES as temperature increases.

Answer 12

True

Question 13

True or false?

The resistance of an NTC (negative temperature coefficient) thermistor DECREASES as temperature increases.

Answer 13

True

Question 14

When the engine is cold, the fuel mixture must be ________ to prevent stalling and engine stumble. When the engine is warm, the fuel mixture can be ________ to provide maximum fuel economy with the lowest possible exhaust emissions.

Answer 14

Richer, Leaner

Question 15

Normal engine vacuum is ________.

Answer 15

17-21 in. Hg.