Electrical measurements/Electrical Measurement MCQ Question Set 9 Sample Test,Sample questions

Question:
 ADC gives polarity indication.

1. True

2. False

3.all of the above

4.All of the Mentioned


Question:
 Clock pulses are controlled ______

1.automatically

2.using microcontrollers

3.using valves

4.manually


Question:
 Feedback voltage is applied to the ________

1.comparator

2.error amplifier

3.potentiometer

4.sliding contact


Question:
 How is 11.87 V displayed on a 10 V range for a 4 digit display?

1.11.870

2.1.1870

3.118.7

4. 0.1187


Question:
 How to obtain balance?

1. by using a detector

2.by changing the pot setting

3.by supplying voltage

4. by using a transformer


Question:
 In a potentiometric DVM ____

1.voltage is compared

2.current is compared

3.resistance is compared

4.power is compared


Question:
 Input voltage depends on ______

1.resistance

2.capacitance

3.current

4.time-period


Question:
 Noise rejection is poor.

1.True

2.False

3.all of the above

4.None of the mentioned


Question:
 Old information is used to set range relays.

1. True

2.False

3.all of the above

4.None of the mentioned


Question:
 Output of a digital multimeter is _____

1.mechanical

2. optical

3. electrical

4.analog


Question:
 Sensitivity of a DVM is given by _______

1.S = 1

2. S = (fs)min

3. S = (fs)min × R

4.S = R


Question:
 What is the output voltage in a dual slope integrating type DVM?

1.differential of the input

2.multiple of the input

3.integral of the input

4.zero


Question:
A 3 digit display DVM with a maximum reading of 1999 indicates _______

1.increase by a factor

2. reduction by a factor

3.no change in value

4.depends on the circuit components


Question:
A practical Q meter consists of ______

1.Wien bridge oscillator

2.AF oscillator

3.RF oscillator

4.Crystal oscillator


Question:
A.C. voltages are measured using _______

1.oscillators and op amps

2.rectifiers and filters

3.resistor and capacitor

4.inductor and resistor


Question:
Accuracy depends on ______

1. input voltage

2. drop across the capacitor

3.magnitude and stability of pulse generator

4.magnitude of the ramp


Question:
Accuracy of a potentiometric DVM is _____

1. zero

2.medium

3. low

4.high


Question:
ADC counter ________

1.attenuates the signal

2. converts digital to analog

3.converts analog to digital

4.contains information


Question:
Analog mulimeters require power supply.

1.True

2.False

3.all of the above

4.None of the mentioned


Question:
Autoranging means ______

1.automatic ranging

2.fixed ranging

3.automobile ranging

4. constant ranging


Question:
Basic building blocks of digital multimeter are _____

1. oscillator, amplifier

2.diode, op amp

3.rectifier, schmitt trigger

4.A/D, attenuator, counter


Question:
Consider a 3 digit display for a DVM with an accuracy of ± 0.5 % for a reading of ± 1 digit. Compute the error for 5 V reading on a 10 V range.

1. ± 10 V

2.± 0.035 V

3.± 0.05 V

4. ± 1 V


Question:
Current is converted to voltage ______

1. through a voltmeter

2.through a resistance

3.through an ammeter

4.through a galvanometer


Question:
Digital multimeter is used for _____

1.measuring a.c. and d.c. current, voltage and resistance

2.measuring a.c. current and voltage

3.measuring d.c. current and resistance

4.measuring a.c. voltage and resistance


Question:
For a value less than 0200, the instrument should ________

1.read values less than 0200 correctly

2. read values randomly

3.automatically switch range

4.should not respond at all


Question:
For resistance measurement, meter contains ____

1.high current source

2. medium current source

3. low current source

4.low voltage source


Question:
How is the reference voltage obtained?

1.from a fixed current source

2.from a variable voltage source

3.from a variable current source

4.from a fixed voltage source


Question:
In a potentiometric DVM, balance is obtained manually.

1.True

2.False

3.all of the above

4.None of the mentioned


Question:
Integration period is obtained by ______

1.using signal amplitude

2.counting the pulse

3.measuring time

4.by differentiating the signal


Question:
Integrator’s output is ______

1.attenuated through a filter

2.feedback to the input

3.stored in a flip-flop

4. differentiated


Question:
Output of the comparator is known as ___

1.amplified signal

2.error signal

3. feedback signal

4.attenuated signal


Question:
Q factor is also defined as the ratio of _______

1.resistance to reactance

2.reactance to resistance

3. power to voltage

4.current to power


Question:
Q factor is called ______

1.Quality factor

2.Quantity factor

3.Queen factor

4.Quarter factor


Question:
Q meter works on the principle of _______

1.barkhausen criterion

2.piezoelectric effect

3. parallel resonance

4.series resonance


Question:
Quantities are digitised using _______

1.D/A converter

2.oscillator

3.amplifier

4.A/D converter


Question:
Resistance is measured using _____

1. constant current source

2.constant voltage source

3.variable current source

4. variable voltage source


Question:
Resolution of a DVM is given by _______

1. R = 1⁄10n

2.R = 1

3. R = 10n

4. R = n⁄10


Question:
Sensitivity is largest change in input.

1.True

2.False

3.all of the above

4.None of the mentioned


Question:
Slider movement depends on ______

1.current magnitude

2.resistance magnitude

3.voltage magnitude

4.power magnitude


Question:
Unknown voltage is _____

1.converted to current

2.boosted

3.filtered

4.measured using a voltmeter


Question:
Voltage across the shunt is measured by ________

1.voltmeter

2.multimeter

3.thermocouple

4.thermometer


Question:
What is a Q meter?

1.quality meter

2.quantity meter

3.instrument

4.detector


Question:
What is the counter value at the beginning?

1.one

2.ten

3. three

4.zero


Question:
What is the effect of clock on the voltage?

1.voltage doubles with clock input

2.voltage halves with clock input

3.no effect

4. voltage becomes zero with clock input


Question:
What is the effect of the capacitor on the output?

1.no effect

2.charging effect

3.electrostatic effect

4.magnetic effect


Question:
What is the maximum count of the counter?

1.9999

2.0

3. 500

4.1000


Question:
What is the resolution for a 3 digit display?

1.1 %

2.0.1 %

3.0.001 %

4. 10 %


Question:
What is the resolution of a 3 digit display on 1 V range?

1.1 V

2.0.1 V

3. 0.01 V

4.0.001 V


Question:
What is the significance of the name dual slope method?

1. it has two slopes

2.it integrates the input twice

3.it uses two inputs

4.it has two outputs


Question:
Why is dual slope method preferred over ramp techniques?

1.no noise

2. partial noise

3.average noise

4.maximum noise


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