Mechanical Engineering

Prepare with the best Mechanical Engineering MCQs with answers and explanations for exams, interviews, and job tests. Our collection covers core topics such as engineering mechanics, thermodynamics, strength of materials, theory of machines, fluid mechanics, heat transfer, manufacturing processes, machine design, and power plant engineering. These Mechanical Engineering multiple-choice questions are designed for students, fresh graduates, and professionals preparing for NTS, PPSC, FPSC, PEC exams, GATE, university entry tests, and recruitment assessments. Strengthen your technical knowledge and problem-solving ability with our updated and comprehensive Mechanical Engineering MCQs.

📘 Automobile Engineering MCQs

📘 Compressors, Gas Dynamics and Gas Turbines MCQs

📘 Engineering Materials MCQs

📘 Engineering Mechanics MCQs

📘 Heat Transfer, Refrigeration and Air Conditioning MCQs

📘 Hydraulic Machines MCQs

📘 Hydraulics and Fluid Mechanics MCQs

📘 IC Engines and Nuclear Power Plants MCQs

📘 Industrial Engineering and Production Management MCQs

📘 Machine Design MCQs

📘 Production Engineering MCQs

📘 Steam Boilers and Engines MCQs

📘 Steam Nozzles and Turbines MCQs

📘 Strength of Materials MCQs

📘 Theory of machines MCQs

📘 Thermodynamics MCQs

📘 topics MCQs

📘 Workshop Technology MCQs

4281. When a body is subjected to two equal and opposite forces, acting tangentially across the resisting section, as a result of which the body tends to shear off across the section, the stress and strain induced is

tensile stress, tensile strain

compressive stress, compressive strain

shear stress, tensile strain

shear stress, shear st

✅ The correct answer is option D.

4282. According to Pascal’s law, the intensity of pressure at any point in a fluid at rest is the same in all directions.

Agree

Disagree

✅ The correct answer is option A.

4283. The metacentric height of a ship is 0.6 m and the radius of gyration is 4 m. The time of rolling of a ship is

4.1 s

5.2 s

10.4 s

14.1 s

✅ The correct answer is option C.

4284. The power transmitted by means of a belt depends upon

velocity of the belt

tension under which the belt is placed on the pulleys

arc of contact between the belt and the smaller pulley

all of the above

✅ The correct answer is option D.

4285. The shock resistance of steel is increased by adding

nickel

chromium

nickel and chromium

cobalt and molybedenum

✅ The correct answer is option C.

4286. An open structure of a grinding wheel is used for

soft materials

tough materials

ductile materials

all of these

✅ The correct answer is option D.

4287. The efficiency of an impulse turbine is maximum when (where Vb = Blade speed, V = Absolute velocity of steam entering the blade, and α = Nozzle angle)

Vb = 0.5 V cos α

Vb = V cos α

Vb = 0.5 V2 cos α

Vb = V2 cosα

✅ The correct answer is option A.

4288. For hardening alloy steels and high speed steels, they are heated to

500 to 600°C

700 to 900°C

1100 to 1300°C

1300 to 1500°C

✅ The correct answer is option C.

4289. Diesel cycle consists of __________ processes.

two constant volume and two isentropic

two constant pressure and two isentropic

two constant volume and two isothermal

one constant pressure,

✅ The correct answer is option D.

4290. The high steam and low water safety valve is not used in

Cochran boiler

Cornish boiler

Lancashire boiler

Locomotive boiler

✅ The correct answer is option D.