Free Practice Questions for TSSPDCL Sub-Engineer

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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 review concepts for the TSSPDCL Sub-Engineer exam. 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.

Exam sponsor: Telangana Southern Power Distribution Company Limited (TSSPDCL). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Questions

100 questions

Time Limit

2 hours

Passing Score

40%

Exam / Certification Fees

₹320

Exam sponsor website

Reported exam pass rate: Competitive. Varies by category: 40% for OC/EWS, 35% for BC, 30% for SC/ST/PH. Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Official sources

TSSPDCL Official Portal

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

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.

Preparing for the TSSPDCL Sub-Engineer Exam

What You Need to Know

Passing score: 40%
Exam length: 100 questions
Time limit: 2 hours
Exam / certification fees: ₹320 Official sources

Using Our Practice Resources

Work through all 100 available questions
Review every answer and explanation
Track weak areas and revisit them
Use our AI tutor for tough concepts

TSSPDCL Sub-Engineer: Suggested Study Strategy

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.