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: Internal energy of a system increases when heat is added at constant volume
A) No temperature change
B) All the above
C) Work done by system
D) No heat transfer
Q: Steam turbines are preferred over gas turbines for
A) High initial cost
B) Constant load conditions
C) Low pressure application
D) Quick start-up
Q: The ratio of specific heats (ฮณ = Cp/Cv) for air is nearly
A) 1.0
B) 1.4
C) 1.33
D) 1.67
Q: Rankine cycle efficiency increases when
A) Boiler pressure is reduced
B) Condenser pressure is increased
C) Superheating is done
D) Feedwater is cooled
Q: Hardness of a material is its ability to
A) Resist deformation
B) Resist wear and abrasion
C) Break easily
D) Withstand impact