100+ Free THDC JE Practice Questions

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2026 Statistics

Key Facts: THDC JE Exam

200

Total CBT Questions

THDC Recruitment Scheme

3 Hours

Exam Duration

Official Notification

₹600

General Application Fee

THDC Careers

0.25

Negative Marking

CBT Exam Pattern

65%

Min. Diploma Marks Required

Eligibility Criteria

The THDC JE CBT is a 3-hour exam with 200 questions: 140 technical and 60 non-technical (30 General Awareness, 30 Reasoning). There is a negative marking of 0.25 marks per wrong answer. Candidates must have a 3-year engineering diploma with at least 65% marks.

Sample THDC JE Practice Questions

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

1According to IS 456:2000, what is the characteristic compressive strength of M30 grade concrete at 28 days?

A.15 N/mm²

B.20 N/mm²

C.25 N/mm²

D.30 N/mm²

Explanation: In concrete mix designations (like M30), the letter 'M' refers to the mix, and the number represents the characteristic compressive strength of 150 mm size cubes at 28 days in N/mm² (MPa). Therefore, M30 concrete has a characteristic compressive strength of 30 N/mm². The values 15, 20, and 25 N/mm² are the strengths of M15, M20, and M25 concrete respectively.

2Which of the following apparatus is commonly used to measure the workability of concrete having medium to high workability in the field?

A.Vee-Bee consistometer

B.Slump cone

C.Compaction factor apparatus

D.Vicats apparatus

Explanation: The slump test using a slump cone is the most common field test to measure the workability of concrete for medium to high workability ranges (slump value 25 mm to 125 mm). The Vee-Bee test is suitable for very dry mixes, compaction factor is used for low workability mixes, and Vicat's apparatus is used to determine the consistency and setting time of cement paste, not concrete.

3Which of the following statement is TRUE regarding contour lines in surveying?

A.Contour lines of different elevations can cross each other in case of a vertical cliff

B.Contour lines of different elevations can cross each other in case of an overhanging cliff

C.Closely spaced contour lines indicate a flat terrain

D.Contour lines always run parallel to each other

Explanation: Contour lines do not cross or intersect except in the rare case of an overhanging cliff. In the case of a vertical cliff, contour lines of different elevations run together and unite to form a single line, but they do not cross. Closely spaced contour lines indicate steep slopes, whereas widely spaced lines indicate gentle or flat slopes.

4If the void ratio (e) of a soil sample is 0.50, what is its porosity (n)?

A.0.33

B.0.50

C.0.67

D.0.25

Explanation: The relationship between porosity (n) and void ratio (e) is given by the formula n = e / (1 + e). Substituting the given value of e = 0.50, we get n = 0.50 / (1 + 0.50) = 0.50 / 1.50 = 1/3 ≈ 0.33. The other options are mathematically incorrect based on this standard geotechnical relationship.

5The continuity equation in fluid mechanics is based on the principle of conservation of which of the following?

A.Energy

B.Momentum

C.Mass

D.Force

Explanation: The continuity equation is a mathematical expression of the principle of conservation of mass. For a steady, one-dimensional flow, it is expressed as A1*V1 = A2*V2 (for incompressible fluids). Bernoulli's equation is based on the conservation of energy, and the impulse-momentum equation is based on the conservation of momentum.

6For a simply supported beam of rectangular cross-section subjected to a transverse loading, where does the maximum bending stress occur?

A.At the neutral axis

B.At the extreme top and bottom fibers

C.At one-third of the depth from the top

D.Uniformly distributed across the depth

Explanation: According to the flexure formula (M/I = σ/y), the bending stress (σ) is directly proportional to the distance (y) from the neutral axis. Therefore, the bending stress is zero at the neutral axis and reaches its maximum value at the extreme top (compression) and extreme bottom (tension) fibers. Shear stress, conversely, is maximum at the neutral axis for a rectangular section.

7According to Duff Abrams' Water-Cement Ratio Law, the strength of concrete depends primarily on which factor?

A.The quantity of cement used

B.The ratio of water to cement by volume/weight, provided the mix is workable

C.The size of the aggregates

D.The method of curing

Explanation: Duff Abrams' Water-Cement Ratio Law states that for any given set of materials and conditions, the strength of concrete is determined solely by the ratio of the volume of mixing water to the volume of cement, so long as the mixture is plastic and workable. Lowering the water-cement ratio increases the compressive strength, although sufficient water must be present for hydration and workability.

8In compass surveying, what does 'local attraction' refer to?

A.The gravitational pull of the earth at the station

B.The magnetic influence of local metallic objects or electrical cables on the compass needle

C.The presence of local beautiful sights affecting the surveyor

D.The difference between true north and magnetic north

Explanation: Local attraction is the deviation of the magnetic needle of a compass from its normal position under the influence of local magnetic substances like iron ore, steel structures, railway tracks, or electric cables. It is detected by calculating the difference between the fore bearing and back bearing of a line; if it is exactly 180 degrees, both stations are free from local attraction.

9If the liquid limit (w_L) of a soil is 45% and its plastic limit (w_P) is 20%, what is the Plasticity Index (I_P) of the soil?

A.65%

B.25%

C.2.25%

D.15%

Explanation: The Plasticity Index (I_P) is the numerical difference between the liquid limit and the plastic limit of a soil: I_P = w_L - w_P. Substituting the given values: I_P = 45% - 20% = 25%. This parameter represents the range of water content over which the soil remains in a plastic state.

10What is the partial safety factor for structural steel material (yielding failure) under limit state design according to IS 800:2007?

A.1.15

B.1.50

C.1.10

D.1.25

Explanation: According to Table 5 of IS 800:2007, the partial safety factor for structural steel against yield strength failure (denoted as γ_m0) is 1.10. The factor for resistance governed by ultimate strength (γ_m1) is 1.25, and for connections it varies (e.g., 1.25 for shop welding/bolts). A factor of 1.50 is used for concrete in IS 456, and 1.15 is used for steel reinforcement in IS 456.

About the THDC JE Exam

THDC India Limited conducts the Junior Engineer Trainee (JET) recruitment exam to select candidates for various engineering roles. The selection process consists of a written Computer-Based Test (CBT) followed by a personal interview. The written CBT has a weightage of 85% and the interview carries 15% (or as specified in the recruitment notification). The objective written test includes core engineering subjects (Civil, Electrical, Mechanical) alongside sections testing General Awareness and Logical Reasoning. This practice exam focuses on preparing candidates for the objective CBT written stage.

Questions

200 scored questions

Time Limit

3 hours

Passing Score

50% for UR/EWS/OBC, 30% for SC/ST/PwBD

Exam Fee

₹600 for General/OBC/EWS, Exempted for SC/ST/PwBD (THDC India Limited)

THDC JE Exam Content Outline

70%

Concerned Engineering Discipline

Technical questions covering Core Civil, Electrical, or Mechanical engineering syllabus.

15%

General Awareness

Static GK, current affairs, Indian constitution, geography, general science, and Indian power sector.

15%

Reasoning & Aptitude

Logical deduction, coding-decoding, series, analogies, syllogism, and basic numerical aptitude.

How to Pass the THDC JE Exam

What You Need to Know

Passing score: 50% for UR/EWS/OBC, 30% for SC/ST/PwBD
Exam length: 200 questions
Time limit: 3 hours
Exam fee: ₹600 for General/OBC/EWS, Exempted for SC/ST/PwBD

Keys to Passing

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

THDC JE Study Tips from Top Performers

1Focus heavily on the core diploma textbooks for your technical engineering stream (Civil, Electrical, or Mechanical). Technical questions account for 70% of the total marks.

2Understand the fundamentals of hydro power generation, turbines, and general power sector facts in India, as THDC is a prominent hydro power PSU.

3Regularly practice logical reasoning questions including series completion, coding-decoding, blood relations, and syllogisms to secure high marks in the 30 non-technical reasoning questions.

4Read standard current affairs sources and static GK books covering the Indian Constitution, geography, history, and basic general science.

5Practice timed mock tests to manage the 180-minute duration effectively across the 200 questions, ensuring you minimize errors to avoid the 0.25 negative marking penalty.

Frequently Asked Questions

What is the selection process for THDC JET?

The selection process consists of a written Computer Based Test (CBT) worth 85% of the total score, followed by a Personal Interview carrying 15% weightage. Final merit lists are prepared combining the performance in both stages.

What is the marking scheme and duration of the THDC JE exam?

The exam is 3 hours (180 minutes) long, consisting of 200 multiple-choice questions. Each question carries 1 mark, and there is a negative marking of 0.25 marks (1/4th) for every incorrect answer.

Are B.Tech / B.E. graduates eligible to apply for THDC Junior Engineer Trainee?

Generally, candidates with only B.Tech/B.E. degrees without the essential 3-year Diploma in Engineering are not eligible. A full-time regular 3-year Diploma in Civil, Electrical, or Mechanical Engineering is the primary educational requirement.

What are the minimum qualifying marks for the THDC JET CBT?

Candidates belonging to UR/EWS/OBC (NCL) categories must score at least 50% of the total marks, while SC/ST/PwBD/Ex-Servicemen candidates must score a minimum of 30% marks to qualify for the interview stage.

What is the application fee for the THDC JE recruitment?

The application fee is ₹600 for General, OBC, and EWS candidates. Candidates belonging to SC, ST, PwBD, and Ex-Servicemen categories, as well as departmental candidates, are completely exempted from paying the fee.

100+ Free THDC JE Practice Questions

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