# Electrical measurements/Electrical Measurement MCQ Question Set 10 Sample Test,Sample questions

## Question: ` A single cycle appears on the screen when _______`

1. sweep and signal frequencies are equal

2.sweep and signal frequencies are not equal

3.sweep and signal frequencies are zero

4.sweep frequency is greater than signal frequency

## Question: ` C.R.O gives _______`

1.actual representation

2.visual representation

3.approximate representation

4. incorrect representation

1.4 plates

2. 6 plates

3.2 plates

4.8 plates

## Question: ` Electron beam diverges.`

1.True

2.False

3.all of the above

4.None of the mentioned

1. 1 direction

2. 4 directions

3. 3 directions

4.2 directions

1. rectangular

2. cylindrical

3.spherical

4. square

## Question: ` Lumped parameter delay line consists of______`

1.RC networks

2. RL networks

3.LC networks

4.Resistive networks

## Question: ` Phase inverter is used in an amplifier in the CRO because ____`

1. phase inversion is needed

2.no phase inversion is needed

3.it is needed to operate a push pull

4. it provides voltage stability

## Question: ` Role of an attenuator is ________`

1. to boost the signal

2.to distort the signal

3. to remove noise

4. to improve the operation

## Question: ` Spot is displayed only when _______`

1. frequencies are different

2.frequencies are zero

3. frequencies are same

4.voltage is high

1.y = Ky Vy

2.y = Ky

3. x = 1

4.y = Vy

## Question: ` What is done to make the trace horizontal?`

1.negative voltage is applied

2.positive voltage is applied

3.no voltage is applied

4.voltage is synchronised

## Question: ` What is the effect of the signal delay on the sweep generator?`

1. no effect

2.input increases in magnitude

3. output doesnâ€™t get any delay

4.output gets sufficient delay

## Question: ` What is the flyback period?`

1.voltage is very high

2.current is very low

3.voltage is zero

4.current is very high

## Question: ` What is the role of an invert in a CRO?`

1. inverts the output

2.inverts the input

3. attenuates the input

4.magnifies the input

1.2 â„¦

2.3 â„¦

3. 5.5 â„¦

4.4.7 â„¦

1.50

2.100

3.150

4.200

## Question: `Alternate is used to shift the inputs.`

1.True

2. False

3.all of the above

4.None of the mentioned

## Question: `Amplifier is multiple stage in a CRO.`

1. True

2.False

3.all of the above

4.None of the mentioned

1.half band

2. full band

3.wide band

4.narrow band

## Question: `BJT is used in the amplifier stage.`

1.True

2.False

3.all of the above

4.None of the mentioned

## Question: `Control grid is given _______`

1.positive voltage

2.negative voltage

3.negative voltage

4.zero voltage

## Question: `CRO canâ€™t display microseconds time.`

1. True

2.False

3.all of the above

4.None of the mentioned

## Question: `CRO is a ______`

1.fast x-y plotter

2. slow x-y plotter

3.medium x-y plotter

4.not a plotter

## Question: `CRO stands for _____`

1. Cathode Ray Oscilloscope

2.Current Resistance Oscillator

3.Central Resistance Oscillator

4.Capacitance Resistance Oscilloscope

1.2 delay lines

2.3 delay lines

3.4 delay lines

4.5 delay lines

1.2 delay lines

2.3 delay lines

3.4 delay lines

4.5 delay lines

1. ts = 1â„fc

2. ts = 1

3.ts = 1â„Ï€

4. ts = 1â„Ï€fc

## Question: `Distributed parameter delay line is a transmission line.`

1.True

2.False

3.all of the above

4.None of the mentioned

## Question: `During trace time, voltage is decreasing with time.`

1.True

2.False

3.all of the above

4.None of the mentioned

## Question: `Effect of negative voltage to the grid is ______`

1. no force

2.a gravitational force

3. an attractive force

4.a repulsive force

## Question: `Electron gun section _____`

1. provides sharp beam

2.provides poorly focussed beam

3.doesnâ€™t provide any beam

4.provides electrons only

1.4 sections

2.8 sections

3. 15 sections

4.20 sections

1. x = Kx

2. x = Vx

3.x = 1

4. x = Kx Vx

## Question: `Inductance does not affect a transmission line.`

1.True

2.False

3.all of the above

4.None of the mentioned

1. rectifier

2.amplifier

3.oscillator

4.op amp

1. oscillator

2.attenuator

3.rectifier

4.op amp

## Question: `Light produced in a screen is ____`

1. disappears immediately

2.does not disappear at all

3.is not visible to the eye

4.disappears slowly

1. a ohmmeter

2.an ammeter

3.a voltmeter

4.a multimeter

## Question: `Position knob in a CRO indicates _____`

1. voltage position only

2.time position only

3. current position only

4. any patternâ€™s position

## Question: `Q Meter is used to measure ____`

1.Q factor of an inductive coil

2.Only the effective resistance

3.Only bandwidth

4.Q factor of an inductive coil, the effective resistance, and bandwidth

## Question: `Q meter operator is the principle of _______`

1.Series resonance

2.Current resonance

3.Self-inductance

4.Eddy currents

## Question: `Sinusoidal voltage is not observed on the screen.`

1.True

2.False

3.all of the above

4.None of the mentioned

## Question: `T section in a delay circuit of CRO acts as ____`

1.high pass filter

2.low pass filter

3.band pass filter

4. band reject filter

## Question: `Typical values for a distributed parameter delay line are ________`

1.Zo = 10 Má¿¼ and td = 10 nsec/m

2.Zo = 1 ká¿¼ and td = 500 nsec/m

3.Zo = 1000 á¿¼ and td = 180 nsec/m

4.Zo = 100 Gá¿¼ and td = 275 nsec/m

## Question: `Typically oscilloscope represents ______`

1.current and time

2.resistance and time

3.voltage and time

4.power and time

## Question: `Visible spot must be moved in _______`

1. two directions

2.one direction

3.three directions

4.four directions

## Question: `What determines light intensity in a CRT?`

1.voltage

2.current

3.momentum of electrons

4.fluorescent screen

## Question: `What is the role of astigmatism in a CRO?`

1.increases the intensity

2. used for voltage stability

3.diminishes the intensity

4. focus control

## Question: `What is the role of CRT?`

1. to emit electrons

2.to emit protons

3.to emit neutrons

4.to emit alpha particles

1.measurement

2. illumination

3.sharpness

4.stability

## Question: `What is the role of the focus section in a CRO?`

1. increases the focus

2.decreases the focus

3.controls sharpness

4.maintains the focus zero

## Question: `What is the role of the intensity section in a CRO?`

1.decreases the light intensity

2.controls light intensity

3.increases the light intensity

4.keeps the light intensity zero

## Question: `What provides a periodic voltage waveform?`

1.sweep generator

2.voltmeter

3.oscillator

4.amplifier

## Question: `Why is a delay line used in a CRO?`

1. to boost the signal

2.to distort the signal

3.to provide signal delay

4.for stability

## Question: `X10 in a CRO means ________`

1.one tenth

2.control knob

3.10 times as normal

4.attenuate the voltage by 10 times

## More MCQS

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