Top 50 Engineering Exam Questions & Answers to Boost Your Preparation

Introduction

Preparing for engineering competitive exams such as GATE, IES, SSC JE, or various PSU recruitments can be challenging. To help you strengthen your technical knowledge and problem-solving skills, we’ve compiled a list of the Top 50 Engineering Exam Questions and Answers covering core topics from Civil, Mechanical, Electrical, Electronics, and Computer Science Engineering.
These questions are carefully selected from previous exams and expert recommendations — ideal for last-minute revision and concept clarity.

Top 50 Engineering Exam Questions and Answers

Civil Engineering Questions

1. What is the unit weight of reinforced concrete?
   ? Answer: Approximately 25 kN/m³.
2. What is the full form of OPC?
   ? Answer: Ordinary Portland Cement.
3. What is the maximum permissible limit of water absorption for bricks?
   ? Answer: 20% by weight.
4. What is the function of a retaining wall?
   ? Answer: To resist the lateral pressure of soil.
5. Which test is used to determine the workability of concrete?
   ? Answer: Slump Test.

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Mechanical Engineering Questions under Top 50 Engineering Exam Questions & Answers

6. What is the first law of thermodynamics?
   ? Answer: Energy can neither be created nor destroyed; it only changes form.
7. What is meant by entropy?
   ? Answer: A measure of disorder or randomness in a system.
8. What is a four-stroke engine?
   ? Answer: An internal combustion engine completing a power cycle in four strokes of the piston.
9. What is the function of a flywheel?
   ? Answer: To store energy and maintain uniform speed in machines.
10. What is the difference between laminar and turbulent flow?
    ? Answer: Laminar flow is smooth and orderly; turbulent flow is irregular and chaotic.

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Electrical Engineering Questions

11. What is Ohm’s Law?
    ? Answer: V=IRV = IRV=IR, where voltage = current × resistance.
12. Define power factor.
    ? Answer: The ratio of real power to apparent power.
13. What is a transformer?
    ? Answer: A static device that transfers electrical energy between circuits using electromagnetic induction.
14. What is the function of a circuit breaker?
    ? Answer: To automatically disconnect a circuit in case of overload or fault.
15. What is the frequency of AC supply in India?
    ? Answer: 50 Hz.

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Electronics & Communication Engineering Questions

16. What is a diode?
    ? Answer: A semiconductor device that allows current to flow in only one direction.
17. What is modulation?
    ? Answer: The process of varying a carrier signal in order to transmit data.
18. What is the function of an operational amplifier (Op-Amp)?
    ? Answer: To amplify voltage difference between two input terminals.
19. What is the bandwidth of a signal?
    ? Answer: The range of frequencies a signal occupies.
20. What is a microcontroller?
    ? Answer: A compact integrated circuit that contains processor, memory, and input/output peripherals.

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Computer Science Engineering Questions

21. What is an algorithm?
    ? Answer: A step-by-step procedure to solve a problem.
22. What is the difference between compiler and interpreter?
    ? Answer: A compiler translates the entire program at once, while an interpreter executes line by line.
23. What is a database?
    ? Answer: A structured collection of data stored electronically.
24. What is the function of an operating system?
    ? Answer: To manage hardware, software, and system resources.
25. What is Big O notation?
    ? Answer: It represents the time complexity or performance of an algorithm.

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General Engineering Aptitude Questions

26. What is SI unit of power?
    ? Answer: Watt (W).
27. What is Pascal’s law?
    ? Answer: Pressure applied to a confined fluid is transmitted equally in all directions.
28. What is the value of acceleration due to gravity (g)?
    ? Answer: 9.81 m/s².
29. Which metal is used in electrical wiring?
    ? Answer: Copper.
30. Which law explains electromagnetic induction?
    ? Answer: Faraday’s Law.

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More Practice Questions

31. Define heat treatment.
32. What is Bernoulli’s theorem?
33. What is torsion?
34. Define resonance in electrical circuits.
35. What is the difference between AC and DC current?
36. What is Poisson’s ratio?
37. What is tensile strength?
38. Define capacitance.
39. What is a transistor used for?
40. What is the use of CAD in mechanical design?
41. Define viscosity.
42. What is stress and strain?
43. What is PID control in automation?
44. What is SQL used for?
45. Define compiler optimization.
46. What is Kirchhoff’s Voltage Law (KVL)?
47. What is meant by parallel connection?
48. What is the use of a relay?
49. What is the difference between series and parallel circuits?
50. What is load factor in power systems?

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Conclusion

Engineering exams test not only your technical expertise but also your problem-solving speed and accuracy. Regular practice with important questions like these will boost your confidence and help you perform better in upcoming exams.

? Tip: Keep revising formulas, concepts, and previous year questions daily.

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Related Pages

• Civil Engineering Jobs in India
• Mechanical Engineering Jobs in India
• Electrical Engineering Jobs in India
• Computer Science Engineering Jobs

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