Directions: Each of the following items consist of two statements, one labeled as ‘Statement (I)’ and the other as ‘Statement (II)’. You are to examine these two statements carefully and select the answer using the code given below:Statement (I): Digital universal counter timer is used to measure time period and frequency of various circuits that are assembled together to form one complete block.Statement (II): Digital counters use logic gates which are selected and controlled by a single front panel switch known as function switch which can be in either frequency or time-base mode.

Both Statement (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of Statement (I)

Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I)

Both Statement (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of Statement (I)

Statement (I) is true but Statement (II) is false

Statement (I) is false but Statement (II) is true

Multiplication features are incorporated in an ohmmeter to enable the meter to ________.

be multipurpose in its application

measure very high resistance values

measure values with the least error

be multipurpose in its application

In a digital voltmeter, during start of conversion, zero indication is displayed and is called auto zeroing. This is achieved by

Using a positive reference voltage

Using a negative reference voltage

Properly charging the differentiator circuit capacitance to ground

Properly discharging the integrator circuit capacitance to ground

Digital multimeter is used to perform ‘Diode Check’. Which of the following is an expected reading for a good diode?

When the red lead of the multimeter is connected to the negative terminal of the diode and the black to the positive terminal, then we have to get a low value.

When both the red and negative leads of the multimeter are connected to positive terminal of the diode, then we have to get a high reading on the multimeter.

When the red lead of the multimeter is connected to positive terminal of the diode while its negative lead is connected to the negative terminal of the diode, then we have to get a low reading on the multimeter.

When the red lead of the multimeter is connected to the negative terminal of the diode and the black to the positive terminal, then we have to get a low value.

When the red lead of the multimeter is connected to positive terminal of the diode while its negative lead is connected to the negative terminal of the diode, then we have to get a high reading on the multimeter.

Directions: It consists of two statements, one labeled as the 'Statement (I)' and the other as 'Statement (II)'. Examine these two statements carefully and select the answer using the codes given below:Statement (I): Integrating DVM measures the true average value of the input voltage over a fixed measuring period.Statement (II): Since the display of measured signal is a decimal number, the errors due to parallax and observation error are eliminated.

Statement (I) is true but Statement (II) is false

Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I)

Both Statement (I) and Statement (II) are individually true but Statement (II) is NOT the correct explanation of Statement (I)

Statement (I) is true but Statement (II) is false

Statement (I) is false but Statement (II) is true

What is a digitizing circuit?

converts digital signal to analog

boosts the magnitude of a digital signal

converts analog signal to digital

In DVM the common mode rejection noise is eliminated by ________

increasing the signal amplitude

33 + Mcqs in Performance Parameters Digital Voltmeters in Electrical Measurements Page 1 McqOptions

1.	User must wait for a stable reading.
A.	True
B.	False
Answer» B. False

2.	In a digital voltmeter, the oscillator frequency is 400 KHz. The Ramp voltage falls from 8V to 0V in 20 ms. what is the number of pulses Counted by counter?
A.	8000
B.	4000
C.	3200
D.	1600
Answer» B. 4000

3.	A DVM has a 3 ½ digit display. The 1-volt range can read upon
A.	9999
B.	9.99
C.	1.999
D.	0.19999
Answer» D. 0.19999

4.	An integrating digital voltmeters measures
A.	True average value
B.	rms value
C.	Peak value
D.	None of the above
Answer» B. rms value

5.	A 3 ½ digit voltmeter has an accuracy specification of ± 0.5% of reading ± one digit. What is the possible error in volts when the instrument displays 2.00 V on the 10 V scale?
A.	0.03 V
B.	0.02 V
C.	0.01 V
D.	0.005 V
Answer» B. 0.02 V

6.	A variable reluctance tachometer has 180 teeth on rotor. The speed of shaft on which mounted in 1800 rpm. The frequency of output pulses is
A.	1800 Hz
B.	3600 Hz
C.	4800 Hz
D.	5400 Hz
Answer» E.

7.	Consider the following types of digital voltmeters:1. Ramp type2. Dual slope integrating type3. Integrating type using voltage to frequency conversion4. Successive approximation type5. Servo balanced potentiometer typeWhich of these require a fixed reference voltage at the comparator stage?
A.	1 and 2 only
B.	3, 4 and 5 only
C.	2 and 3 only
D.	1, 4 and 5 only
Answer» D. 1, 4 and 5 only

11.	A \(3\frac{1}{2}\) digit voltmeter is accurate to ±0.5% of reading ±2 digits. What is the percentage error, when the voltmeter reads 0.10 V on its 10 V range?
A.	0.025%
B.	0.25%
C.	2.05%
D.	20.5%
Answer» E.

12.	An 8-bit successive approximation DVM of 5 V range is used to measure 1.2 V. The contents of the SAR after 5 clock is
A.	01010000
B.	00111100
C.	00111000
D.	00110111
Answer» C. 00111000

13.	An unknown DC voltage is to be measured. Which measuring range in the multimeter will you select first?
A.	500 V
B.	50 V
C.	5 V
D.	0.5 V
Answer» B. 50 V

14.	An integrator type DVM (digital voltmeter) contains a 100 kΩ resistor and 1 μF capacitor. If the voltage applied to the integrator input is 1 volt, what voltage will be present at the output of the integrator after 1 second?
A.	1.1 V
B.	1 V
C.	10 V
D.	100 V
Answer» D. 100 V

15.	A frequency counter needs to measure a frequency of 15 Hz. Its signal gating time is 2s. What is the percentage accuracy of the counter, taking into account the gating error?
A.	3.33%
B.	13.33%
C.	98.67%
D.	96.67%
Answer» E.

16.	A ± 1 count error occurs in digital frequency meter due to
A.	Trigger level uncertainty
B.	Spurious interference
C.	Clock uncertainty
D.	Gate time uncertainty
Answer» E.

22.	A DVM uses 10 MHz clock and has a voltage-controlled generator which provides a width of 5 μs/Volt of unit signal. 10 V input signal would correspond to a pulse count of
A.	500
B.	750
C.	250
D.	1000
Answer» B. 750

23.	A digital to analog converter with a full – scale output voltage of 3.5 V has resolution close to 14 mV. It’s bit size is
A.	4
B.	8
C.	16
D.	32
Answer» C. 16

17.	A digital voltmeter has \(4 \frac{1}{2}\) digit display. The 1 V range can read up to
A.	1.0000 V
B.	1.1111 V
C.	0.9999 V
D.	1.9999 V
Answer» E.

18.	A voltmeter connected across 15 kΩ resistor reads 10 V in the circuit given. Voltmeter is rated at 500 Ω / volt and has a full- scale reading of 20 V. The supply voltage is:
A.	60 V
B.	45 V
C.	30 V
D.	90 V
Answer» B. 45 V

21.	Frequency counter can be used to measure1. fundamental frequency of input signal2. fundamental and harmonic frequencies of input signal3. time interval between two pulses4. pulse width.Which of the above statements are correct?
A.	1, 2, 3 and 4
B.	1, 2 and 3 only
C.	2, 3 and 4 only
D.	1, 3 and 4 only
Answer» E.

24.	A \(3 \frac 1 2\) digit voltmeter has the resolution of
A.	0.01% of the full range
B.	0.05% of the full range
C.	0.1% of the full range
D.	0.5% of the full range
Answer» D. 0.5% of the full range

25.	User must wait for a stable reading?
A.	True
B.	False
Answer» B. False

27.	DVM has ________
A.	1-3 digits
B.	2-5 digits
C.	3-6 digits
D.	7-10 digits
Answer» D. 7-10 digits

28.	Normal mode noise can be eliminated through ________
A.	attenuation
B.	filtering
C.	amplification
D.	a transformer
Answer» C. amplification

29.	Output of DVM needs ________
A.	4 lines
B.	2 lines
C.	8 lines
D.	16 lines
Answer» B. 2 lines

30.	In DVM the common mode rejection noise is eliminated by ________
A.	increasing the signal amplitude
B.	making use of a resistance
C.	using a transformer
D.	guarding
Answer» E.

31.	Input impedance of a DVM is ________
A.	low
B.	zero
C.	high
D.	medium
Answer» D. medium

Explore topic-wise MCQs in Electrical Measurements.

User must wait for a stable reading.

In a digital voltmeter, the oscillator frequency is 400 KHz. The Ramp voltage falls from 8V to 0V in 20 ms. what is the number of pulses Counted by counter?

A DVM has a 3 ½ digit display. The 1-volt range can read upon

An integrating digital voltmeters measures

A 3 ½ digit voltmeter has an accuracy specification of ± 0.5% of reading ± one digit. What is the possible error in volts when the instrument displays 2.00 V on the 10 V scale?

A variable reluctance tachometer has 180 teeth on rotor. The speed of shaft on which mounted in 1800 rpm. The frequency of output pulses is

Consider the following types of digital voltmeters:1. Ramp type2. Dual slope integrating type3. Integrating type using voltage to frequency conversion4. Successive approximation type5. Servo balanced potentiometer typeWhich of these require a fixed reference voltage at the comparator stage?

Multiplication features are incorporated in an ohmmeter to enable the meter to ________.

In a digital voltmeter, during start of conversion, zero indication is displayed and is called auto zeroing. This is achieved by

A \(3\frac{1}{2}\) digit voltmeter is accurate to ±0.5% of reading ±2 digits. What is the percentage error, when the voltmeter reads 0.10 V on its 10 V range?

An 8-bit successive approximation DVM of 5 V range is used to measure 1.2 V. The contents of the SAR after 5 clock is

An unknown DC voltage is to be measured. Which measuring range in the multimeter will you select first?

An integrator type DVM (digital voltmeter) contains a 100 kΩ resistor and 1 μF capacitor. If the voltage applied to the integrator input is 1 volt, what voltage will be present at the output of the integrator after 1 second?

A frequency counter needs to measure a frequency of 15 Hz. Its signal gating time is 2s. What is the percentage accuracy of the counter, taking into account the gating error?

A ± 1 count error occurs in digital frequency meter due to

A digital voltmeter has \(4 \frac{1}{2}\) digit display. The 1 V range can read up to

A voltmeter connected across 15 kΩ resistor reads 10 V in the circuit given. Voltmeter is rated at 500 Ω / volt and has a full- scale reading of 20 V. The supply voltage is:

Digital multimeter is used to perform ‘Diode Check’. Which of the following is an expected reading for a good diode?

Frequency counter can be used to measure1. fundamental frequency of input signal2. fundamental and harmonic frequencies of input signal3. time interval between two pulses4. pulse width.Which of the above statements are correct?

A DVM uses 10 MHz clock and has a voltage-controlled generator which provides a width of 5 μs/Volt of unit signal. 10 V input signal would correspond to a pulse count of

A digital to analog converter with a full – scale output voltage of 3.5 V has resolution close to 14 mV. It’s bit size is

A \(3 \frac 1 2\) digit voltmeter has the resolution of

User must wait for a stable reading?

What is a digitizing circuit?

DVM has ________

Normal mode noise can be eliminated through ________

Output of DVM needs ________

In DVM the common mode rejection noise is eliminated by ________

Input impedance of a DVM is ________

Accuracy of a DVM is ________

Basic range of DVM is _________

33.	Basic range of DVM is _________
A.	1 or 10 V
B.	0.1 or 1 V
C.	10 or 100 V
D.	100 or 1000 V
Answer» B. 0.1 or 1 V