Module 4 Round 2

Question 1

What is the name transistor short for

Answer 1

Transfer resistor

Question 2

What are the two main categories of transistors

Answer 2

Bipolar and field effect

Question 3

What 3 parts make up a transistor

Answer 3

The emitter
The base (the middle layer)
The collector (last layer)

Question 4

What is the purpose of the first layer (the emitter) in a transistor

Answer 4

It Emmitts charge carriers

Question 5

What is the purpose of the middle layer (the base) of the transistor

Answer 5

To regulate the charge carriers

Question 6

What is the purpose of the last layer (the collector) in a transistor

Answer 6

The collector collects the charges

Question 7

What is the principle function of a transistor

Answer 7

The current flowing out of a transistor must be equal to the currents flowing in

Question 8

What are integrated circuits (IRS)

Answer 8

Arrangements of several electronic components in a common housing

Question 9

What is the biggest advantage of IRS

Answer 9

The very high density of the components and the arrangements making them very compact

Question 10

What components normally make up an IR

Answer 10

• Semiconductors
• Resistors
• Capacitors

Question 11

Why can’t inductances be integrated in IR’s

Answer 11

Due to their large space requirements

Question 12

Can IR’s be found in analogue or digital devices

Answer 12

Both

Question 13

What do operational amplifiers normally consist of

Answer 13

Several different stages

Question 14

What is the input stage of an operational amplifier

Answer 14

A differential amplifier

Question 15

What is the output stage of an operational amplifier normally

Answer 15

A push pull power amplifier

Question 16

What sort of current can operational amplifiers amplify

Answer 16

AC and DC

Question 17

What are operational amplifiers also known as

Answer 17

Op Amps

Question 18

What is open loop gain

Answer 18

Infinite

Question 19

What are the benefits of PCBs

Answer 19

• robust physical strength
• cheap
• easy to manufacture

Question 20

What is the most common types of base materials of PCBs

Answer 20

Laminated paper

Question 21

What happens during the subtractive process

Answer 21

Boards laminated with copper on one or both sides

Question 22

What is the biggest disadvantage of the subtractive manufacturing process

Answer 22

Only a small area of the board remains protected. Much of the copper is removed and it’s a waste of material

Question 23

What are the two main types of servomechanisms

Answer 23

Synchros and resolvers

Question 24

What are synchros and resolvers mainly used for

Answer 24

Electromechanical servo systems

Question 25

What are synchros similar in construction to

Answer 25

AC generators

Question 26

What are the main things in construction of synchros

Answer 26

A laminated stator core which carries 3 coils staggered by 120 degrees apart

Question 27

Synchros are manufactured with a diameter between

Answer 27

0.5 and 3.7 inches

Question 28

What type of voltages are synchros built for

Answer 28

Excitation voltages 26v or 115v 400hz

Question 29

Where does the accuracy level lie for a synchro

Answer 29

Between plus or minus 4 and plus or minus 10 arc minutes

Question 30

What is achieved with pancake synchros

Answer 30

Higher levels of accuracy