Free Printable CA_ Transistorized SVR

1.

Voltage regulators normally use

a)

Negative feedback

b)

Positive feedback

c)

No feedback

d)

Phase limiting

2.

During regulation, the power dissipation of the pass transistor equals the collector-emitter voltage times the

a)

Base current

b)

Load current

c)

Zener current

d)

Fold back current

3.

If the output of a voltage regulator varies from 15 to 14.7V between the minimum and maximum load current, the load regulation is

a)

0

b)

1 %

c)

2 %

d)

5 %

4.

If the output of a voltage regulator varies from 20 to 19.8V when the line voltage varies over its specified range, the source regulation is

a.

b.

c.

a)

0

b)

1 %

c)

2 %

d)

5 %

5.

The output impedance of a voltage regulator is

a)

Very small

b)

Very large

c)

Equal to the load voltage divided by the load current

d)

Equal to the input voltage divided by the output current

6.

Compared to the ripple into a voltage regulator, the ripple out of a voltage regulator is

a)

Equal in value

b)

Much larger

c)

Much smaller

d)

Impossible to determine

7.

A series regulator is an example of a

a)

Linear regulator

b)

Switching regulator

c)

Shunt regulator

d)

DC-to-dc converter

8.

An increase of line voltage into a power supply usually produces

a)

A decrease in load resistance

b)

An increase in load voltage

c)

A decrease in efficiency

d)

Less power dissipation in the rectifier diodes

9.

A power supply with low output impedance has low

a)

Load regulation

b)

Current limiting

c)

Line regulation

d)

Efficiency

10.

A zener-diode regulator is a

a)

Shunt regulator

b)

Series regulator

c)

Switching regulator

d)

Zener follower

11.

The input current to a shunt regulator is

a)

Variable

b)

Constant

c)

Equal to load current

d)

Used to store energy in a magnetic field

12.

The efficiency of a voltage regulator is high when

a)

Input power is low

b)

Output power is high

c)

Little power is wasted

d)

Input power is high

13.

A shunt regulator is inefficient because

a)

It wastes power

b)

It uses a series resistor and a shunt transistor

c)

The ratio of output to input power is low

d)

All of the above

14.

A series regulator is more efficient than a shunt regulator because

a)

It has a series resistor

b)

It can boost the voltage

c)

The pass transistor replaces the series resistor

d)

It switches the pass transistor on and off

15.

The zener follower is an example of a

a)

Boost regulator

b)

Shunt regulator

c)

Buck regulator

d)

Series regulator

16.

A switching regulator is considered

a)

Quiet

b)

Noisy

c)

Inefficient

d)

Linear

CA_ Transistorized SVR_12.05.2021

Total questions: 16

Worksheet time: 8mins

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