Mechanical Engineering MCQs
Mechanical Engineering MCQs are a crucial resource for students and job seekers preparing for competitive tests in Pakistan. This section features MCQs from all major areas including thermodynamics, fluid mechanics, machine design, manufacturing processes, engineering materials, and mechanics of solids. These questions are crafted to meet the standards of exams like PPSC, FPSC, NTS, and university entry or semester tests. Each MCQ is aimed at testing your fundamental understanding and problem-solving ability, making them perfect for both fresh graduates and experienced professionals. With a wide range of topics, this category ensures a comprehensive practice session for anyone looking to ace Mechanical Engineering exams.
Q: Poisson’s ratio is defined as the ratio of
A) Lateral strain to axial strain
B) Stress to strain
C) Axial strain to lateral strain
D) Shear strain to shear stress
Q: Heat is transferred by conduction when
A) Bodies are at same temperature
B) Molecular interaction occurs
C) Radiation dominates
D) There’s motion of fluid
Q: Unit of thermal conductivity in SI is
A) W/K
B) W/m·K
C) W/m
D) W/m²
Q: In gas turbines, intercooling is used to
A) Reduce work input
B) Increase temperature
C) Increase combustion
D) Increase pressure
Q: The term “degree of freedom” in mechanics refers to
A) Types of motion
B) Modes of vibration
C) Number of independent motions
D) Number of constraints
Q: Mohr’s circle is used to determine
A) Shear and normal stresses
B) Torque
C) Stress concentration
D) Moments
Q: Euler’s formula is used to calculate
A) Stress
B) Buckling load
C) Bending moment
D) Heat loss
Q: Welding process involving non-consumable electrode is
A) Resistance welding
B) MIG
C) TIG
D) Arc welding
Q: In reciprocating compressors, clearance volume is necessary to
A) Prevent fluid leakage
B) Avoid piston striking
C) Reduce friction
D) Avoid knocking
Q: The main function of lubricating oil is to
A) Increase temperature
B) Clean components
C) Decrease power
D) Reduce wear