Jkp Constable Telecommunication Telecommunication Mcqs Jkp Constable (1089 MCQs) | JKSSB & SSC Quiz

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Practice Questions

1089 Total
Question 1051 Discuss
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Which of the following is considered an active electronic component?

A
Capacitor
B
Inductor
C
Transistor
D
Resistor

Answer & Explanation

Correct Option: C

Active components, like transistors and ICs, have the ability to inject power into a circuit or amplify signals. Passive components (resistors, caps) only consume or store energy.
Question 1052 Discuss
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The 'Skin Effect' at high radio frequencies causes AC current to flow primarily:

A
Through the center core of the conductor
B
Evenly throughout the cross-section
C
Near the outer surface of the conductor
D
In the dielectric material surrounding the wire

Answer & Explanation

Correct Option: C

At high frequencies, self-inductance in the center of a wire pushes the current toward the periphery, effectively reducing the cross-sectional area and increasing resistance.
Question 1053 Discuss
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In a database, ensuring that a particular transaction occurs completely or not at all is an example of maintaining:

A
Isolation
B
Atomicity
C
Durability
D
Redundancy

Answer & Explanation

Correct Option: B

Atomicity (the 'A' in ACID) ensures that a transaction is treated as a single, indivisible logical unit of work. It strictly follows an 'all or nothing' rule.
Question 1054 Discuss
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If a telecommunication room uses lead-acid batteries for backup power, what specific maintenance action must be routinely performed?

A
Replacing all internal lead plates monthly
B
Checking and topping up specific gravity with distilled water
C
Discharging them completely to zero volts before charging
D
Keeping them in a perfectly sealed airtight environment

Answer & Explanation

Correct Option: B

Flooded lead-acid batteries lose water during electrolysis (charging). They require periodic checking of electrolyte levels and refilling strictly with distilled water.
Question 1055 Discuss
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In the context of the Internet of Things (IoT) applied in e-Governance smart city projects, IPv6 is preferred over IPv4 primarily because:

A
IPv6 uses less bandwidth
B
IPv6 provides a vastly larger address space for millions of sensors
C
IPv6 relies on analog transmission
D
IPv6 completely eliminates the need for encryption

Answer & Explanation

Correct Option: B

IPv6 uses 128-bit addresses (compared to 32-bit in IPv4), providing a near-infinite pool of IP addresses necessary for the massive device deployment in IoT networks.
Question 1056 Discuss
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An ideal operational amplifier (Op-Amp) should possess which of the following characteristics?

A
Infinite input impedance, zero output impedance
B
Zero input impedance, infinite output impedance
C
Infinite input impedance, infinite output impedance
D
Zero input impedance, zero output impedance

Answer & Explanation

Correct Option: A

An ideal Op-Amp draws zero current from the source (infinite input impedance) and can drive any load without a voltage drop (zero output impedance).
Question 1057 Discuss
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Calculate the RMS (Root Mean Square) voltage of an AC signal whose peak voltage is 311V.

A
200 V
B
220 V
C
311 V
D
440 V

Answer & Explanation

Correct Option: B

For a sine wave, Vrms = Vpeak / sqrt(2). Vrms = 311 / 1.414 = approx 220 Volts.
Question 1058 Discuss
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When designing an earth wire system, why is the earth wire purposely made thicker than phase and neutral wires?

A
To increase its resistance
B
To ensure low resistance so fault current trips the breaker quickly
C
To prevent it from breaking easily
D
To act as a physical support for other wires

Answer & Explanation

Correct Option: B

A thicker wire translates to a lower electrical resistance. During a short circuit to the casing, huge fault currents must pass unimpeded to the earth to rapidly blow the fuse or trip the MCB.
Question 1059 Discuss
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In optical fiber, what phenomenon limits the data rate by causing narrow light pulses to spread out over distance?

A
Attenuation
B
Dispersion
C
Refraction
D
Absorption

Answer & Explanation

Correct Option: B

Dispersion is the broadening of light pulses as they travel. If pulses spread too much, they overlap (Inter-Symbol Interference), dictating the maximum bandwidth distance product.
Question 1060 Discuss
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Which material is broadly classified as diamagnetic, meaning it creates a weak opposing magnetic field to an external applied field?

A
Iron
B
Nickel
C
Copper
D
Cobalt

Answer & Explanation

Correct Option: C

Copper, bismuth, and water are examples of diamagnetic materials. They have a relative permeability slightly less than 1. Iron, nickel, and cobalt are ferromagnetic.
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