CertiGuide to A+ (Core Hardware)  9  Chapter 0000:  The Start of the PC

VIII  Chapter 0000: Test for Success Questions 1 Chapter 0001:  Power Supplies - System Board

1. Which PC, or microcomputer, did MITS develop?

A. Tandy

B. Altair

C. 386 DX

D. None of the above

Explanation: MITS, stationed in Albuquerque, NM created the Altair. Microsoft developed the code to make it work.

2. True or False: A Conductor, in electrical terms, is an element that gives up electrons rather easily.

A. True

B. False

Explanation: Conductors give up electrons easily, which allows electricity to flow through them.

3. Of the examples given which are conductive materials (choose all that apply)?

A. Aluminum

B. Gold

C. Iron

D. Your finger

E. All of the above

Explanation: All metals conduct to some degree. You finger conducts due to the water, carbon, and iron in your blood.

4. Which of the following are insulators?

A. Rubber

B. Glass

C. Plastic

D. All of the above

E. None of the above

Explanation: Non-metallic materials insulate well.

5. What does the W symbol stand for?

A. Ohms

B. Volts

C. Watts

D. Megahertz

6. Which of the following is used for measuring electrical pressure?

A. Wattage

B. Voltage

C. Ohms

D. Hertz

7. True or False: If electricity moves only one-way it is called Direct Current?

A. True

B. False

Explanation: All electricity moves towards the path of least resistance.

8. Which of the following is How North American Electricity is delivered?

A. 120 VAC at 40 CPS

B. 240 VAC at 50 CPS

C. 120 VAC at 60 CPS

D. 240 VAC at 70 CPS

9. Taking DC Current and pulsing it is the basis for what kind of signal?

A. Analog

B. Satellite

C. Digital

D. RADAR

Explanation: Taking DC current, which has a constant voltage, and pulsing it creates 1’s and 0’s for binary counting.

10. The color rings on a resistor signify what?

A. How many ohms it can resist

B. The amount of current going through it

C. Nothing. They are just there to make it look marketable

D. The amount of pressure it can sustain

Explanation: The rings signify the amount of resistance the resistor has, measured in ohms.

11. What is the main function of a transistor?

A. To stop the flow of electricity

B. To regulate the amount of electricity flowing through it

C. To direct the electricity where to go

D. To measure the electricity in volts

Explanation: Remember the analogy that transistors are like valves for electricity. They regulate flow.

12. True or false: a capacitor stores electrons?

A. True

B. False

Explanation: Capacitors are like water tanks that store electricity.

13. In Computer math, including Base 2; 10; and 16, is 0 a valid number?

A. Yes

B. No

Explanation: Zero is always a valid number.

14. What are the different digits available to use in base 2?

A. 0, 1

B. 1,2

C. A, B

D. 10, 16

15. In Binary, what does the number 1101 stand for?

A. 3

B. One thousand one hundred one

C. 13

D. 32

Explanation: Count up the columns. 8+4+1=13.

16. What are the different digits available in hexadecimal math?

A. 1-16

B. A-P

C. 0-9 and A-F

D. 0-15

17. How many bits to a byte?

A. 1

B. 4

C. 8

D. 256

Explanation: There are 8 bits in a byte, 4 bits in a nibble. No kidding.

18. What does the Hexadecimal number 220h stand for in Base 10?

A. 220

B. 512

C. 544

D. 666

Explanation: Refer to your Base2 and Base16 charts.

19. True or false the jumper sleeve has a piece of metal inside that completes a circuit so that electricity knows where to go?

A. True

B. False

Explanation: Jumpers complete an electronic circuit when they are placed over two metal posts.

20. What do DIP Switches do?

A. They tell Electricity where to go using multiple on/off switches

B. They are used to help People learn binary math

C. They have no function

D. They connect two or more electronic posts together

Explanation: DIP switches can be thought of as banks of jumpers in switch form.

VIII  Chapter 0000: Test for Success Questions 1 Chapter 0001:  Power Supplies - System Board