Mechanical Engineering MCQs
Mechanical Engineering MCQs for competitive exams in Pakistan cover thermodynamics, fluid mechanics, machine design, manufacturing, and materials. Ideal for PPSC, FPSC, NTS, and university tests, they help students and professionals enhance concepts and problem-solving skills.
Q: When two gears are meshed, the smaller is called
A) Driver
B) Pinion
C) Rack
D) Sprocket
Q: Otto cycle is used in
A) Steam turbines
B) Diesel engines
C) Jet engines
D) Gasoline engines
Q: Materials are tempered after hardening to
A) Increase hardness
B) Improve elasticity
C) Induce stress
D) Reduce brittleness
Q: The efficiency of a Carnot engine depends on
A) Working fluid
B) Pressure ratio
C) Temperature difference
D) Volume ratio
Q: The Reynolds number is used to predict
A) Fluid density
B) Flow regime
C) Heat transfer
D) Pipe diameter