R4RIN – MCQs, Mock Tests | Electrical measurements Electrical Measurement MCQ Question Set 12

Which oscilloscope is used in a digital storage oscilloscope?

1. multi trace
2. dual trace
3. modern
4. conventional

✅ Correct Answer: 4

Power requirement is _________

1. low
2. high
3. medium
4. zero

✅ Correct Answer: 1

The stored image can be displayed ______

1. for a limited time
2. for infinite time
3. for zero time
4. for an intermediate time

✅ Correct Answer: 2

The analog signal is digitized using _____

1. D/A converter
2. Oscillator
3. A/D converter
4. Rectifier

✅ Correct Answer: 3

How is the data displayed?

1. through a screen
2. through a computer
3. through an FPGA
4. through a microprocessor

✅ Correct Answer: 4

A digital storage oscilloscope has _____

1. 3 modes
2. 2 modes
3. 4 modes
4. 5 modes

✅ Correct Answer: 1

By making use of a CRO _____

1. many characteristics of a signal can be measured
2. only a few characteristics of a signal can be measured
3. no characteristics of a signal can be measured
4. signal can only be displayed

✅ Correct Answer: 1

How is the waveform adjusted?

1. by adjusting the voltage
2. through shift controls
3. by reducing the current
4. by means of a galvanometer

✅ Correct Answer: 2

How is error in measurement reduced?

1. using r.m.s value
2. using absolute value
3. using peak to peak value
4. using a voltmeter

✅ Correct Answer: 3

CRO is voltage measuring device.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

Period of a waveform is obtained by which of the following relation?

1. T = number of divisions occupied by 1 cycle×(time)
2. T = number of divisions occupied by 1 cycle×(1⁄division)
3. T = number of divisions occupied by 1 cycle×(time⁄division)
4. T = number of divisions occupied by 1 cycle

✅ Correct Answer: 3

How is frequency related to time period?

1. square proportional
2. not related
3. directly proportional
4. inversely proportional

✅ Correct Answer: 3

How many types of acquisition methods are there in a digital storage oscilloscope?

1. 3
2. 6
3. 2
4. 4

✅ Correct Answer: 1

An oscilloscope with 20 to 50 GHz needs a slow speed.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

In which method of acquisition, pretrigger event is lost?

1. Real time sampling
2. Random repetitive sampling
3. Sequential repetitive sampling
4. Analog Sampling

✅ Correct Answer: 3

In Sequential repetitive sampling how many samples are captured?

1. ten
2. five
3. two
4. one

✅ Correct Answer: 4

In Real time sampling, bandwidth is limited.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

What plays an important role in Real time sampling?

1. small memory and fast sampling
2. large memory and slow sampling
3. large memory and fast sampling
4. small memory and slow sampling

✅ Correct Answer: 3

A single trigger event can capture how many samples in Real time sampling?

1. 1
2. nm/2
3. 2nm
4. nm

✅ Correct Answer: 4

In Real time sampling what is the 3 dB bandwidth?

1. fs/4
2. fs/8
3. 2fs
4. fs

✅ Correct Answer: 1

CRO is used for measurement of _______

1. AC as well as DC current
2. AC current only
3. DC current only
4. AC power only

✅ Correct Answer: 1

CRO is used in a radar for ______

1. studying the pattern of flights
2. visualizing a target
3. measuring voltage
4. determining the distance between source and destination

✅ Correct Answer: 2

In radio applications, CRO is used for measuring ____

1. audio frequency range
2. a narrow range of frequencies
3. a wide range of frequencies
4. radio frequency range

✅ Correct Answer: 3

In medical applications CRO can be used for ______

1. measuring the heart beats
2. monitoring the brain
3. improving the nervous system functioning
4. displaying cardiograms

✅ Correct Answer: 4

CRO is used for many purposes in the industry.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

A CRO can’t be used in transmission lines.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

Curve tracers use CRO in _____

1. diodes
2. passive devices
3. active devices
4. op amps

✅ Correct Answer: 3

A CRO is used in check _____

1. op amps
2. resistors
3. voltage
4. capacitance, inductance and diodes

✅ Correct Answer: 4

A CRO is used in labs for _____

1. frequency measurement
2. voltage measurement
3. current measurement
4. resistance measurement

✅ Correct Answer: 1

A recorder is a device ____

1. An indicating instrument which displays a time-varying signal
2. Whose function is to record the value of the quantity as it is being measured
3. Which records electrical and non-electrical quantities or relates two signals to each other as a function of time
4. Which records the value of the quantity measured as well as the electrical and non-electrical quantities as a function of time

✅ Correct Answer: 4

In a dual slop integrating type digital voltmeter, the firs integrating is carried out for 10 periods of the supply frequency of 50 Hz. If the reference voltage used is 2 V, the total conversion time for an input of 1 V is?

1. 0.01 s
2. 0.05 s
3. 0.1 s
4. 1 s

✅ Correct Answer: 3

The source of emission of electrons in a circuit is ________

1. p-n junction diode
2. a barium and strontium oxide coated cathode
3. accelerating anode
4. post-accelerating anode

✅ Correct Answer: 4

A CRO can display ____

1. AC signals
2. DC signals
3. Both AC and DC signals
4. Time-invariant signals

✅ Correct Answer: 3

X and Y plates of a CRO are connected to unequal voltages of equal frequency with phase shift of 90°. The Lissajous figure on the screen will be?

1. Circle
2. Straight line
3. Ellipse
4. Figure of eight

✅ Correct Answer: 3

To the Y input of a CRO, we feed a signal defined by 10sin100t, to the X-input, we feed signal 10cos100t. The gain for both X channel and Y channel is the same, the screen will show?

1. Sinusoidal signal
2. A straight line
3. An ellipse
4. A circle

✅ Correct Answer: 4

A CRO uses ______

1. Electromagnetic focusing
2. Electrostatic focusing
3. Both Electrostatic and Electromagnetic focusing
4. No focusing technique

✅ Correct Answer: 2

The two inputs of a CRO are fed with two stationary periodic signals. The figure changes from ellipse to circle and back to ellipse with its major axis changing orientation slowly and repeatedly. The following inference can be made from this.

1. The signals are not sinusoidal in nature
2. The amplitudes of the signals are very close but not equal
3. The signals are sinusoidal with their frequencies very close but not equal
4. There is a constant but small phase difference between the signals

✅ Correct Answer: 4

An oscilloscope indicates ________

1. The peak to peak value of the voltage
2. DC value of the voltage
3. Rms value
4. Average value

✅ Correct Answer: 1

What is a data acquisition system?

1. system used for data processing, conversion and transmission
2. accepts data as an input
3. removes noise
4. boosts the signal

✅ Correct Answer: 1

A typical data acquisition system consists of _____

1. op amps
2. sensors
3. rectifiers
4. transistors

✅ Correct Answer: 2

The data acquisition system implies input data collection ______

1. in mixed signal form
2. in analog form
3. in digital form
4. in the form of binary codes

✅ Correct Answer: 3

Data measurement systems are _______

1. not flexible
2. rigid
3. less flexible
4. more flexible

✅ Correct Answer: 4

Modern electronic instrumentation system is not complex.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

The data acquisition system can have any speed.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

A data acquisition system provides _______

1. partial communication
2. ineffective communication
3. effective communication
4. complete communication

✅ Correct Answer: 3

Data acquisition system can be used in ______

1. 10 ways
2. 8 ways
3. 4 ways
4. 2 ways

✅ Correct Answer: 4

Data acquisition system is mainly classified into ______

1. 2 types
2. 4 types
3. 6 types
4. 8 types

✅ Correct Answer: 1

Transducer is used to convert a _______

1. physical quantity into an electrical signal
2. electrical signal into a physical quantity
3. physical quantity into a mechanical quantity
4. physical quantity into a chemical quantity

✅ Correct Answer: 1

Transducer produces a _______

1. proportional current
2. proportional voltage
3. proportional resistance
4. proportional power

✅ Correct Answer: 2

Sensors produce frequency which is counted by ______

1. a chemical counter
2. a mechanical counter
3. an electronic counter
4. a basic counter

✅ Correct Answer: 3

Signal conditioner is used for _____

1. attenuating the voltage
2. maintaining a constant voltage
3. keeping the voltage zero
4. boosting the voltage

✅ Correct Answer: 4

A multiplexer is used for ______

1. accepting multiple inputs
2. accepting single input
3. accepting multiple outputs
4. accepting single output

✅ Correct Answer: 1

Multiplexers are used when the distance between source and destination is less.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

Output signal is captured using _____

1. CRO
2. plotter
3. recorder
4. voltmeter

✅ Correct Answer: 3

Analog computers have _______

1. zero cost
2. intermediate cost
3. more cost
4. less cost

✅ Correct Answer: 4