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: Cast iron is widely used because of its
A) High strength
B) Good machinability
C) Ductility
D) High toughness
Q: The angle between two surfaces of a cutting tool is called
A) Clearance angle
B) Rake angle
C) Helix angle
D) Relief angle
Q: Velocity ratio in a screw jack is
A) Always less than 1
B) Always more than 1
C) Equal to 1
D) Zero
Q: Newtonβs second law is concerned with
A) Force and acceleration
B) Velocity and mass
C) Acceleration and inertia
D) Friction and reaction
Q: First law of thermodynamics is the law of
A) Energy conservation
B) Ideal gases
C) Friction
D) Entropy
Q: When a beam is subjected to pure bending
A) Deflection is zero
B) No stress develops
C) Only normal stress exists
D) Shear stress occurs
Q: Factor of safety is defined as
A) Breaking load / Design load
B) Yield stress / Allowable stress
C) Maximum load / Working load
D) Ultimate stress / Allowable stress
Q: Gear ratio is determined by
A) Gear size
B) Torque
C) Pitch circle diameter
D) Number of teeth
Q: Specific speed of a pump is used to classify
A) Cavitation
B) Impellers
C) Turbines
D) Flow types
Q: Diesel engines use
A) Battery ignition
B) Carburetor
C) Spark plug
D) Fuel injection