Television Engineering MCQs

Question 1

Lissajous patterns obtained by an oscilloscope can be used to get

Accepted Answer

both frequency and phase information

Answer

phase information

Answer

frequency of input signal

Answer

voltage amplitude

Question 2

The term wide-band as applied to an oscilloscope denotes the bandwidth of its

Accepted Answer

vertical amplifier

Answer

horizontal amplifier

Answer

both vertical and horizontal amplifiers

Answer

none of the above

Question 3

When a complete oscilloscope is used as a vectorscope, with the input signals coupled directly to CRT deflection plates, the deflection plates must be effectively isolated from

Accepted Answer

both vertical and horizontal amplifiers

Answer

vertical amplifier only

Answer

horizontal amplifier only

Answer

accelerating anodes

Question 4

An oscilloscope is generally used to measure the value of .......... voltage

Accepted Answer

peak-to-peak ac

Answer

dc

Answer

rms ac

Answer

average value of ac

Question 5

The purpose of a synch oscilloscope is to

Accepted Answer

lock the signal

Answer

set the intensity level

Answer

control brightness

Answer

set the focus

Question 6

The length of the sweep screen is controlled by

Accepted Answer

horizontal gain

Answer

sync control

Answer

sweep selector

Answer

vertical gain

Question 7

A demodulator probe is used to

Accepted Answer

extend the bandwidth of an oscilloscope

Answer

increase the gain of an oscilloscope

Answer

prevent distortion of TV station signal

Answer

de-energise the vertical amplifier

Question 8

When repetition rate of sawtooth waveform in an oscilloscope is one-third that of input signal voltage, the number of complete cycles of the signal voltage displayed on CRT screen would be

Accepted Answer

3

Answer

1/3

Answer

6

Answer

2

Question 9

Both dot and line patterns on a TV screen are produced by

Accepted Answer

pulse waveforms

Answer

sine waves

Answer

rectangular waves

Answer

sawtooth waves