PracticeVideosBlogFlashcardsEspañol
All Practice Exams

100+ Free WBCHSE HS Vocational Telecom Practice Questions

Prepare for the West Bengal Council of Higher Secondary Education Class 12 Vocational Telecommunication Exam exam with instant access — no signup required.

✓ No registration✓ No credit card✓ No hidden fees✓ Start practicing immediately
100+ Questions
100% Free

Loading practice questions...

Same family resources

Explore More West Bengal Higher Secondary (WBCHSE)

Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.

West Bengal HS Political Science

Practice Questions

West Bengal HS Accountancy

Practice Questions

West Bengal HS Agriculture — Vocational

Practice Questions

West Bengal HS Alternative English — Second Language

Practice Questions

West Bengal HS Anthropology

Practice Questions

West Bengal HS Apparel — Vocational

Practice Questions
2026 Statistics

Key Facts: WBCHSE HS Vocational Telecom Exam

TELV

Official WBCHSE subject code

https://wbchse.wb.gov.in/subjects/

30%

Minimum pass in theory and practical/project independently

https://wbchse.wb.gov.in/frequently-asked-questions-examination

INR 215

Class XII semester enrolment total (INR 190 to Council)

WBCHSE Memo L/PR/305/2025 / L/PR/275/2026

bn+en

Non-language paper media commonly Bengali and English

WBCHSE examination regulations

Sem I–IV

Higher Secondary semester system across Classes XI–XII

https://wbchse.wb.gov.in/annual-working-plan

A comprehensive vocational qualification exam for Class 11-12 students under WBCHSE, evaluating technical competency in mobile communications, fiber optics, network equipment, broadband systems, and telecom maintenance. English-language MCQ study adaptation for WBCHSE HS—not an official board paper, translation, or format simulation.

Sample WBCHSE HS Vocational Telecom Practice Questions

Try these sample questions to test your WBCHSE HS Vocational Telecom exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1What is the standard unit of measurement for signal bandwidth in analog telecommunication systems?
A.Hertz (Hz)
B.Bits per second (bps)
C.Watts (W)
D.Ohms (Ω)
Explanation: Analog bandwidth refers to the range of frequencies occupied by a signal and is measured in Hertz (Hz) or its multiples like kHz and MHz. Digital data rates use bits per second (bps). Watts measure power and Ohms measure electrical resistance.
2In Amplitude Modulation (AM), which parameter of the high-frequency carrier wave is varied in accordance with the message signal?
A.Frequency
B.Amplitude
C.Phase
D.Wavelength
Explanation: In Amplitude Modulation (AM), the instantaneous amplitude of the high-frequency carrier signal is varied proportionally to the amplitude of the modulating message signal. The frequency and phase of the carrier wave remain constant. Frequency Modulation (FM) alters frequency, while Phase Modulation (PM) alters phase.
3Which modulation technique offers superior noise immunity against electrical atmospheric disturbances?
A.Amplitude Modulation (AM)
B.Frequency Modulation (FM)
C.Double Sideband Suppressed Carrier (DSB-SC)
D.Single Sideband (SSB)
Explanation: Frequency Modulation (FM) provides far greater immunity to noise and atmospheric interference than AM because noise primarily affects signal amplitude. FM receivers use limiters to remove amplitude variations without losing information stored in frequency shifts.
4According to the Nyquist Sampling Theorem, what is the minimum sampling frequency required to convert an analog signal with maximum frequency f_max into a digital signal without aliasing?
A.f_max
B.2 * f_max
C.0.5 * f_max
D.4 * f_max
Explanation: The Nyquist Sampling Theorem states that to perfectly reconstruct an analog signal, the sampling rate f_s must be at least twice the highest frequency component (f_s >= 2 * f_max). Sampling below this rate leads to aliasing distortion.
5If an amplifier increases an input power of 1 mW to an output power of 100 mW, what is the power gain in decibels (dB)?
A.10 dB
B.20 dB
C.30 dB
D.100 dB
Explanation: Power gain in decibels is calculated as 10 * log10(P_out / P_in). Here, 10 * log10(100 / 1) = 10 * 2 = 20 dB.
6Which sequence correctly represents the three main functional steps of Pulse Code Modulation (PCM)?
A.Quantization -> Sampling -> Encoding
B.Sampling -> Quantization -> Encoding
C.Encoding -> Sampling -> Quantization
D.Sampling -> Modulation -> Demodulation
Explanation: In Pulse Code Modulation (PCM), an continuous analog signal is first sampled at discrete time intervals, then quantized into discrete voltage levels, and finally encoded into binary bit patterns.
7What is quantization noise in a Pulse Code Modulation (PCM) system?
A.Thermal noise generated by electronic components in the transmitter
B.Interference caused by adjacent radio channels
C.The error introduced by approximating continuous sample values with discrete levels
D.Attenuation caused by high resistance in copper wire
Explanation: Quantization noise (or error) is the difference between the actual continuous amplitude of an analog sample and the nearest discrete quantization level assigned to it during digitization. Increasing the number of bits per sample reduces quantization noise.
8In Binary Phase Shift Keying (BPSK), how are digital bits 0 and 1 represented on the carrier signal?
A.By two different signal amplitudes
B.By two carrier frequencies
C.By phase shifts of 0° and 180°
D.By turning the carrier signal on and off
Explanation: In Binary Phase Shift Keying (BPSK), a single carrier frequency is used, and logic '0' and '1' are represented by shifting the phase of the carrier wave by 180 degrees relative to each other (e.g., 0° for bit 0 and 180° for bit 1).
9Quadrature Amplitude Modulation (QAM) combines variations in which two characteristics of a carrier wave?
A.Amplitude and Frequency
B.Amplitude and Phase
C.Frequency and Phase
D.Wavelength and Polarization
Explanation: QAM (Quadrature Amplitude Modulation) modulates both the amplitude and the phase of two carrier waves that are 90° out of phase (in-phase and quadrature components). This allows high data spectral efficiency (e.g., 16-QAM, 64-QAM, 256-QAM).
10How does Time Division Multiplexing (TDM) share a single transmission channel among multiple lower-speed data streams?
A.By assigning different frequency sub-bands to each signal simultaneously
B.By assigning distinct repetitive time slots to each signal on the full bandwidth
C.By encoding each signal with a unique orthogonal mathematical code
D.By shifting the optical wavelength of each user signal
Explanation: Time Division Multiplexing (TDM) divides transmission time into discrete frames and assigns specific time slots to each user signal. Each user transmits at maximum channel bandwidth during their designated recurring time slot.

About the WBCHSE HS Vocational Telecom Exam

The WBCHSE HS Vocational Telecommunication examination assesses high school students on core principles of modern telecom systems and network infrastructure. The curriculum covers telecommunication fundamentals, modulation techniques, cellular and mobile network standards (2G through 5G), optical fiber splices and cabling, network equipment configuration (routers, switches, PBX), broadband access technologies, satellite communication, and workplace troubleshooting & electrical safety. This OpenExamPrep bank is an English-language four-option MCQ study aid for the WBCHSE Higher Secondary subject; it does not replace official board papers, required writing/oral/listening evidence, or practical/project/performance/vocational-skill assessment.

Assessment

WBCHSE Higher Secondary subject TELV: Semesters I–IV across Classes XI–XII; theory examinations plus practical/project/performance/oral evidence where the syllabus requires them.

Time Limit

As per semester notification (typically 2–3 hours for theory sittings)

Passing Score

30% minimum in theory and in practical/project independently (WBCHSE examination FAQ)

Exam Fee

Semester enrolment fee structure (Council): Sem III/IV student total INR 215 (155 enrolment + 30 processing + 30 convenience), with INR 190 to Council and INR 25 centre grant; supplementary often INR 50/paper. Separately, the public Fees page lists Class XII examination fees (within schedule) about INR 205 lab / INR 195 non-lab / INR 135 special. Confirm the applicable circular for the sitting. (West Bengal Council of Higher Secondary Education (WBCHSE))

WBCHSE HS Vocational Telecom Exam Content Outline

core

Exam Overview & Structure

Comprehensive overview of the WBCHSE WBCHSE HS Vocational Telecom examination covering syllabus structure, marking scheme, and assessment criteria.

core

Syllabus Breakdown

Detailed unit-wise breakdown of the WBCHSE Class 11 and 12 curriculum for WBCHSE HS Vocational Telecom, aligned with official Council guidelines.

core

Study Tips & Exam Strategy

Proven preparation strategies, time management guidelines, and practice routines to achieve top performance in Higher Secondary assessments.

How to Pass the WBCHSE HS Vocational Telecom Exam

What You Need to Know

  • Passing score: 30% minimum in theory and in practical/project independently (WBCHSE examination FAQ)
  • Assessment: WBCHSE Higher Secondary subject TELV: Semesters I–IV across Classes XI–XII; theory examinations plus practical/project/performance/oral evidence where the syllabus requires them.
  • Time limit: As per semester notification (typically 2–3 hours for theory sittings)
  • Exam fee: Semester enrolment fee structure (Council): Sem III/IV student total INR 215 (155 enrolment + 30 processing + 30 convenience), with INR 190 to Council and INR 25 centre grant; supplementary often INR 50/paper. Separately, the public Fees page lists Class XII examination fees (within schedule) about INR 205 lab / INR 195 non-lab / INR 135 special. Confirm the applicable circular for the sitting.

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

WBCHSE HS Vocational Telecom Study Tips from Top Performers

1Understand basic modulation schemes (AM, FM, PM, ASK, FSK, PSK, QAM) and their waveforms.
2Master fiber optic principles such as total internal reflection, numerical aperture, attenuation, and fusion splicing techniques.
3Learn the roles of cellular components including BTS, BSC, MSC, eNodeB, gNodeB, SIM cards, and handoff mechanisms.
4Practice Ethernet cable termination standards (T568A and T568B) and color coding.
5Review multimeter and OTDR operation for line testing, fault localization, and signal measurement.

Frequently Asked Questions

What is the passing criteria for WBCHSE HS Vocational Telecom?

Candidates must secure a minimum of 30% marks separately in both the theoretical examination and practical/project work.

What core topics are included in the Vocational Telecom syllabus?

The syllabus covers signal modulation, transmission lines, cellular architecture (GSM/LTE/5G), optical fiber installation, cabling, network switches, routers, satellite links, and telecom safety standards.

What standards does the WBCHSE vocational telecom course align with?

The course is aligned with the National Skills Qualifications Framework (NSQF) Level 4 guidelines adapted by WBCHSE and WBSCTVESD for Telecom Technicians and Optical Fiber Splicers.

How is the practical portion of the examination structured?

Practical marks are awarded based on laboratory performance (fiber splicing, crimping, circuit testing), practical records, viva-voce, and hands-on troubleshooting demonstrations.

What is the duration of the theory paper?

The written theory exam is 3 hours long, with an extra 15 minutes provided for reading the question paper.

Are these practice questions the same as the official WBCHSE TELV paper?

No. Official WBCHSE semester papers may include MCQ and descriptive components, plus practical/project/oral evidence where prescribed. These items are an English-language MCQ study adaptation only.