100+ Free TSSPDCL Sub-Engineer Practice Questions

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2026 Statistics

Key Facts: TSSPDCL Sub-Engineer Exam

100 Qs

Total questions on the CBT paper

TSSPDCL Official Pattern

80%

Weightage of Core Electrical Engineering

TSSPDCL Syllabus

₹320

Application and Examination Fee

Official Notification

The TSSPDCL Sub-Engineer exam features a 2-hour CBT with 100 questions. 80% of questions are on core Electrical Engineering topics, including numerical calculations.

Sample TSSPDCL Sub-Engineer Practice Questions

Try these sample questions to test your TSSPDCL Sub-Engineer exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1A 3-phase, 50 Hz induction motor has 6 poles. Its synchronous speed in rpm is:

A.900 rpm

B.1000 rpm

C.1200 rpm

D.1500 rpm

Explanation: Ns = (120 × f) / P = (120 × 50) / 6 = 1000 rpm.

2In a series RLC circuit, resonance occurs when:

A.XL > XC

B.XC > XL

C.XL = XC

D.R = XL

Explanation: Resonance occurs when inductive reactance equals capacitive reactance. This makes total impedance purely resistive.

3A load draws 10 kW at 0.8 lagging power factor. The reactive power drawn is:

A.6 kVAr

B.7.5 kVAr

C.8 kVAr

D.12.5 kVAr

Explanation: Apparent power S = P / cos φ = 10 / 0.8 = 12.5 kVA. Q = √(S² − P²) = √(156.25 − 100) = 7.5 kVAr.

4Which of the following losses in a DC machine varies with the load?

A.Copper loss

B.Eddy current loss

C.Hysteresis loss

D.Friction loss

Explanation: Copper losses (I^2 * R) depend on the square of the current. They vary significantly with the load.

5A 4-pole, lap-wound DC generator has 400 conductors and flux 0.05 Wb. Generated EMF at 1200 rpm is:

A.200 V

B.400 V

C.800 V

D.1200 V

Explanation: Eg = (Phi*Z*N*P)/(60*A). For lap wound A=P, so Eg = (0.05*400*1200)/60 = 400 V.

6In a transformer, which remains constant irrespective of load?

A.Primary current

B.Secondary current

C.Core flux

D.Copper loss

Explanation: The core flux remains almost constant under all load conditions. It is determined by the applied voltage.

7A 4-pole, 50 Hz induction motor runs with 5% slip. Rotor speed is:

A.1425 rpm

B.1440 rpm

C.1500 rpm

D.1575 rpm

Explanation: Ns = (120 × 50) / 4 = 1500 rpm. Nr = Ns(1 − s) = 1500 × 0.95 = 1425 rpm.

8Induction motor Ns=1500 rpm, slip=4%. Rotor speed is:

A.1400 rpm

B.1440 rpm

C.1500 rpm

D.1560 rpm

Explanation: Nr = Ns * (1 - s). Nr = 1500 * (1 - 0.04) = 1440 rpm.

9Which relay is used for long transmission line protection?

A.Mho relay

B.Reactance relay

C.Impedance relay

D.Overcurrent relay

Explanation: Mho (admittance) distance relays are directional and less affected by arc resistance and power swings, making them preferred on long EHV lines.

10The skin effect in a conductor:

A.Increases with area

B.Decreases with frequency

C.Is negligible in DC

D.Independent of material

Explanation: Skin effect occurs with AC current. In DC, frequency is zero, so effect is negligible.

About the TSSPDCL Sub-Engineer Exam

The TSSPDCL Sub-Engineer (Electrical) exam evaluates candidates holding electrical diplomas for technical roles in power distribution. The exam includes technical electrical topics and general aptitude.

Questions

100 scored questions

Time Limit

2 hours

Passing Score

40%

Exam Fee

₹320 (Telangana Southern Power Distribution Company Limited (TSSPDCL))

TSSPDCL Sub-Engineer Exam Content Outline

80%

Electrical Engineering Core

Basic Electrical, AC/DC machines, Power Systems, Transmission & Distribution, Power Electronics, Measurements.

20%

General Awareness and Numerical Ability

General Awareness, Numerical Ability, Telangana Culture & Movement.

How to Pass the TSSPDCL Sub-Engineer Exam

What You Need to Know

Passing score: 40%
Exam length: 100 questions
Time limit: 2 hours
Exam fee: ₹320

Keys to Passing

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

TSSPDCL Sub-Engineer Study Tips from Top Performers

1Core electrical engineering carries 80% weight. Master machines, circuits, power systems, and calculations.

2Learn major events of the Telangana Movement and state culture.

3Practice solving network analysis and transformer formula problems.

Frequently Asked Questions

What is the fee for the TSSPDCL Sub-Engineer exam?

The fee is ₹320 (₹200 application fee + ₹120 exam fee). Candidates from reserved categories (SC, ST, BC, PH) are exempt from the exam fee (₹120) but must pay the application fee (₹200).

What is the educational qualification required?

Candidates must hold a Diploma in Electrical Engineering (DEE) or a Diploma in Electrical and Electronics Engineering (DEEE).

Is there any negative marking in the TSSPDCL exam?

Typically, there is no negative marking in the TSSPDCL Sub-Engineer exam, but candidates should verify the official notification.