T7_Practical_Circuits_part_2

T7_Practical_Circuits_part_2

9th - 12th Grade

21 Qs

quiz-placeholder

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T7_Practical_Circuits_part_2

T7_Practical_Circuits_part_2

Assessment

Quiz

Specialty

9th - 12th Grade

Practice Problem

Medium

Created by

Lawrence Feth

Used 2+ times

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21 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

10 mins • 1 pt

What is the primary purpose of a dummy load?

To prevent transmitting signals over the air when making tests
To prevent over-modulation of a transmitter
To improve the efficiency of an antenna
To improve the signal-to-noise ratio of a receiver

2.

MULTIPLE CHOICE QUESTION

10 mins • 1 pt

Which of the following is used to determine if an antenna is resonant at the desired operating frequency?

A VTVM
An antenna analyzer
A Q meter
A frequency counter

3.

MULTIPLE CHOICE QUESTION

10 mins • 1 pt

What does a dummy load consist of?

A high-gain amplifier and a TR switch
A non-inductive resistor mounted on a heat sink
A low-voltage power supply and a DC relay
A 50-ohm reactance used to terminate a transmission line

4.

MULTIPLE CHOICE QUESTION

10 mins • 1 pt

What reading on an SWR meter indicates a perfect impedance match between the antenna and the feed line?

2 days, 2:50:00
Zero
1:1
Full Scale

5.

MULTIPLE CHOICE QUESTION

10 mins • 1 pt

Why do most solid-state transmitters reduce output power as SWR increases beyond a certain level?

To protect the output amplifier transistors
To comply with FCC rules on spectral purity
Because power supplies cannot supply enough current at high SWR
To lower the SWR on the transmission line

6.

MULTIPLE CHOICE QUESTION

10 mins • 1 pt

What does an SWR reading of 4:1 indicate?

Loss of -4 dB
Good impedance match
Gain of +4 dB
Impedance mismatch

7.

MULTIPLE CHOICE QUESTION

10 mins • 1 pt

What happens to power lost in a feed line?

It increases the SWR
It is radiated as harmonics
It is converted into heat
It distorts the signal

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