Engineering - Mechanical Engineering - MCQs
Delve into our extensive collection of Mechanical Engineering MCQs, covering essential topics such as Thermodynamics, Fluid Mechanics, Mechanics of Materials, Machine Design, and Manufacturing Processes. These Mechanical Engineering questions are crucial for students preparing for competitive exams conducted by FPSC, NTS, KPPSC, PPSC, SPSC, BPSC, OTS, UTS, PTS, CTS, ATS, ETEA, and other testing agencies in Pakistan. Enhance your understanding of mechanical engineering principles and improve your exam readiness with our expertly crafted MCQs, designed to support your success in various assessments.
In which process does a liquid change to gas at a temperature below its boiling point?
A. Condensation
B. Evaporation
C. Sublimation
D. Freezing
Answer: Evaporation
What does the term ‘fatigue’ refer to in materials engineering?
A. A temporary deformation
B. The process of melting
C. Failure due to repeated loading
D. A permanent change in shape
Answer: Failure due to repeated loading
What is the primary function of a flywheel in a mechanical system?
A. To store energy
B. To increase temperature
C. To regulate pressure
D. To enhance lubrication
Answer: To store energy
What is the primary function of a compressor in mechanical systems?
A. To increase pressure of gases
B. To measure flow rate
C. To convert thermal energy
D. To support rotating shafts
Answer: To increase pressure of gases
What does the term ‘stress’ refer to in materials science?
A. The amount of energy stored in a material
B. The internal resistance of a material to deformation
C. The temperature at which a material melts
D. The weight of a material
Answer: The internal resistance of a material to deformation
What does the term ‘yield strength’ signify in materials?
A. The maximum load a material can withstand
B. The stress at which a material begins to deform plastically
C. The point of fracture in a material
D. The tensile strength of a material
Answer: The stress at which a material begins to deform plastically
Which law states that the total energy in a closed system remains constant?
A. Newton's First Law
B. Conservation of Energy Law
C. Bernoulli's Principle
D. Hooke's Law
Answer: Conservation of Energy Law
What is the purpose of lubrication in mechanical systems?
A. To reduce wear and friction
B. To enhance electrical conductivity
C. To increase weight
D. To improve thermal conductivity
Answer: To reduce wear and friction
Which of the following is a type of mechanical advantage?
A. Pulley
B. Torque
C. Friction
D. Gravity
Answer: Pulley
What is the principle behind a hydraulic press?
A. Pascal's Law
B. Bernoulli's Principle
C. Archimedes' Principle
D. Newton's Second Law
Answer: Pascal's Law