Deck 13: Computer Fundamentals

Question 1

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

A) Volt
B) Ohm
C) Ampere
D) Watt

Answer 1

The four basic functions of a computer are the input, processing, storage and the output.
Refer to FIGURE 13-1 in the textbook for the functions of a computer system.
The input to the computer is a voltage signal.
Ohm is the unit of resistance.
As the input to the computer is a voltage signal, ohm is not the unit of electricity for the computer signal.
Thus, the option (b) is wrong.
Ampere is the unit of current.
As the input to the computer is a voltage signal, ampere is not the unit of electricity for the computer signal.
Thus, the option (c) is wrong.
Watt is unit of power. As the input to the computer is a voltage signal, watt is not the unit of electricity for the computer signal.
Thus, the option (d) is wrong.
The unit of voltage is volt, which is the unit of electricity of the input signal for the computer.
Thus, the correct option is
.

Question 2

What part of the vehicle computer is considered to be the brain?

Answer 2

In modern automation, the automotive control systems have a network of electronic sensors, actuators, and computer modules designed for the regulation of powertrain and vehicle support systems.
The central processing unit (CPU) of the vehicle computer is known as brain of the vehicle computer. The main function of the CPU is to make necessary calculations, formal decisions, and conversions. This is the reason why CPU is called brain of vehicle computer.
Therefore, the brain of computer is
.

Question 3

The four basic computer functions include ___________.

A) Writing, processing, printing, and remembering
B) Input, processing, storage, and output
C) Data gathering, processing, output, and evaluation
D) Sensing, calculating, actuating, and processing

Answer 3

The computer is a device which can receive input, process the input information, store the information, and provide desired output.
So, the desired sequence for the functions of the computer is input, processing, storage, and output.
Hence, the correct option is
.
Writing, printing and remembering is not a computer function. So option a is incorrect.
Data gathering and evaluation is not a computer function. So option c is incorrect.
Sensing, calculating and actuating is not a computer function. So option d is incorrect.

Question 4

What is the difference between volatile and nonvolatile RAM?

Question 5

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

A) ROM
B) PROM
C) EPROM
D) EEPROM

Question 6

What are the four input sensors?

Question 7

The "brain" of the computer is the ___________.

A) PROM
B) RAM
C) CPU
D) AD converter

Question 8

What are the four output devices?

Question 9

Computer speed is measured in ___________.

A) Baud rate
B) Clock speed (Hz)
C) Voltage
D) Bytes

Question 10

Which item is a computer input sensor?

A) RPM
B) Throttle position
C) Engine coolant temperature
D) All of the above

Question 11

Which item is a computer output device?

A) Fuel injector
B) Transmission shift solenoid
C) Evaporative emission control solenoid
D) All of the above

Question 12

The SAE term for the vehicle computer is ___________.

A) PCM
B) ECM
C) ECA
D) Controller

Question 13

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

A) Store and process information
B) Turn something on or turn something off
C) Calculate and vary temperature
D) Control fuel and timing only

Question 14

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

A) Digital
B) Analog
C) Analog-to-digital converter
D) PROM