Jkp Constable Telecommunication Telecommunication Mcqs Jkp Constable (1089 MCQs)

Question 1061 Discuss

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A three-phase, 400 V induction motor draws a line current of 10 A at a power factor of 0.8 lagging. What is the total active power consumed?

A

3200 W

B

5542 W

C

4000 W

D

6928 W

Answer & Explanation

Correct Option: B

Power P = sqrt(3) * V_L * I_L * cos(phi). P = 1.732 * 400 * 10 * 0.8 = 5542.4 Watts.

Question 1062 Discuss

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To convert an analog voltage into a digital signal using successive approximation, which internal component continuously compares the input against a generated reference?

A

Integrator

B

Comparator

C

Shift Register

D

Multiplexer

Answer & Explanation

Correct Option: B

A comparator is a high-gain differential amplifier that compares the analog input voltage to the internal DAC's voltage, outputting a high or low state to guide the successive logic.

Question 1063 Discuss

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What is the key purpose of interleaving in error-correction schemes used in digital communications?

A

To compress data size before transmission

B

To spread burst errors out over time, making them easier to correct

C

To increase the amplitude of digital pulses

D

To encrypt data against unauthorized access

Answer & Explanation

Correct Option: B

Interleaving scrambles data bits across time slots. If a burst of noise destroys a chunk of the signal, de-interleaving at the receiver disperses these errors into isolated single-bit errors that standard FEC can easily fix.

Question 1064 Discuss

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The property of an antenna that defines how focused its radiation beam is compared to an isotropic radiator is known as:

A

Bandwidth

B

Polarization

C

Directivity

D

Impedance

Answer & Explanation

Correct Option: C

Directivity measures the concentration of radiation in a particular direction. The higher the directivity, the narrower and more focused the main beam.

Question 1065 Discuss

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When configuring a relational database for a government portal, why is data 'normalization' heavily implemented?

A

To convert textual data into binary code

B

To encrypt user passwords

C

To minimize redundancy and prevent data anomalies

D

To back up the database physically across servers

Answer & Explanation

Correct Option: C

Normalization organizes database tables to reduce duplicated data, ensuring logical consistency and preventing issues during insertion, updating, or deletion.

Question 1066 Discuss

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A UPS system states a transfer time of '< 4 ms'. This specific metric refers to:

A

How fast the battery recharges

B

The duration between grid failure and inverter takeover

C

The speed of the cooling fan startup

D

The time taken to safely shut down computers

Answer & Explanation

Correct Option: B

Transfer time is the split-second delay an offline or line-interactive UPS experiences when switching from mains bypass to battery-inverter power. Under 4ms is fast enough to keep most PCs running without rebooting.

Question 1067 Discuss

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What kind of electromagnetic waves are fundamentally responsible for heating food in a microwave oven, and similarly used in high-capacity telecom links?

A

Shortwaves

B

Centimeter waves (SHF band)

C

Ultraviolet waves

D

X-rays

Answer & Explanation

Correct Option: B

Microwaves fall within the Super High Frequency (SHF) band (approx 3 to 30 GHz), utilized heavily in radar, satellite links, and point-to-point telecom relays.

Question 1068 Discuss

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In India, the e-Kranti framework is a fundamental pillar of which broader national initiative?

A

Make in India

B

Digital India

C

Skill India

D

Smart Cities Mission

Answer & Explanation

Correct Option: B

e-Kranti focuses on the electronic delivery of services, aiming to transform the government machinery to be digitally accessible, making it a core pillar of the Digital India program.

Question 1069 Discuss

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If the length of a uniform conducting wire is doubled and its cross-sectional area is also doubled, what is the new resistance?

A

Doubled

B

Halved

C

Remains the same

D

Quadrupled

Answer & Explanation

Correct Option: C

Resistance R = rho * (L/A). If L becomes 2L and A becomes 2A, R' = rho * (2L/2A) = rho * (L/A) = R. The resistance remains unchanged.

Question 1070 Discuss

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In television broadcast, what is the standard aspect ratio defining the physical proportion of the picture frame for traditional analog TV?

A

16:9

B

4:3

C

1:1

D

21:9

Answer & Explanation

Correct Option: B

Standard definition analog television systems universally adopted a 4:3 (width to height) aspect ratio. Modern HD uses 16:9.

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Practice Questions

A three-phase, 400 V induction motor draws a line current of 10 A at a power factor of 0.8 lagging. What is the total active power consumed?

Answer & Explanation

To convert an analog voltage into a digital signal using successive approximation, which internal component continuously compares the input against a generated reference?

Answer & Explanation

What is the key purpose of interleaving in error-correction schemes used in digital communications?

Answer & Explanation

The property of an antenna that defines how focused its radiation beam is compared to an isotropic radiator is known as:

Answer & Explanation

When configuring a relational database for a government portal, why is data 'normalization' heavily implemented?

Answer & Explanation

A UPS system states a transfer time of '< 4 ms'. This specific metric refers to:

Answer & Explanation

What kind of electromagnetic waves are fundamentally responsible for heating food in a microwave oven, and similarly used in high-capacity telecom links?

Answer & Explanation

In India, the e-Kranti framework is a fundamental pillar of which broader national initiative?

Answer & Explanation

If the length of a uniform conducting wire is doubled and its cross-sectional area is also doubled, what is the new resistance?

Answer & Explanation

In television broadcast, what is the standard aspect ratio defining the physical proportion of the picture frame for traditional analog TV?

Answer & Explanation

jkp constable telecommunication

Topics

Browse Topics

Practice Questions

A three-phase, 400 V induction motor draws a line current of 10 A at a power factor of 0.8 lagging. What is the total active power consumed?

Answer & Explanation

To convert an analog voltage into a digital signal using successive approximation, which internal component continuously compares the input against a generated reference?

Answer & Explanation

What is the key purpose of interleaving in error-correction schemes used in digital communications?

Answer & Explanation

The property of an antenna that defines how focused its radiation beam is compared to an isotropic radiator is known as:

Answer & Explanation

When configuring a relational database for a government portal, why is data 'normalization' heavily implemented?

Answer & Explanation

A UPS system states a transfer time of '< 4 ms'. This specific metric refers to:

Answer & Explanation

What kind of electromagnetic waves are fundamentally responsible for heating food in a microwave oven, and similarly used in high-capacity telecom links?

Answer & Explanation

In India, the e-Kranti framework is a fundamental pillar of which broader national initiative?

Answer & Explanation

If the length of a uniform conducting wire is doubled and its cross-sectional area is also doubled, what is the new resistance?

Answer & Explanation

In television broadcast, what is the standard aspect ratio defining the physical proportion of the picture frame for traditional analog TV?

Answer & Explanation

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