EXAM – PRACTICE EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES
2025|2026 Q&A | INSTANT DOWNLOAD PDF
1. The SI unit of power is:
A. Joule
B. Watt
C. Newton
D. Pascal
Answer: B. Watt
Power is the rate of doing work, measured in joules per second (Watt).
2. What is the moment of a 200 N force acting at 0.4 m from the pivot?
A. 80 N·m
B. 40 N·m
C. 100 N·m
D. 20 N·m
Answer: A. 80 N·m
Moment = Force × Distance = 200 × 0.4 = 80 N·m.
3. In steady-state heat conduction, temperature:
A. Remains constant with time
B. Increases linearly with time
C. Decreases exponentially with time
D. Oscillates periodically
Answer: A. Remains constant with time
Steady-state implies no temporal change in temperature.
4. The modulus of elasticity (E) relates stress to:
A. Strain
B. Pressure
, C. Force
D. Energy
Answer: A. Strain
Hooke’s law states stress = E × strain.
5. Bernoulli’s equation is based on:
A. Conservation of momentum
B. Conservation of mass
C. Conservation of energy
D. Conservation of charge
Answer: C. Conservation of energy
It equates kinetic, potential, and pressure energy along a streamline.
6. The slope of a velocity–time graph represents:
A. Distance
B. Displacement
C. Acceleration
D. Momentum
Answer: C. Acceleration
Acceleration is the rate of change of velocity.
7. The Reynold’s number determines:
A. Flow direction
B. Flow regime
C. Flow rate
D. Flow continuity
Answer: B. Flow regime
It indicates whether flow is laminar or turbulent.
8. A simply supported beam has a uniformly distributed load. The maximum
bending moment occurs at:
A. Midspan
B. Support
C. Quarter span
D. Free end
, Answer: A. Midspan
Symmetrical loading causes maximum bending moment at the center.
9. What is the primary cause of corrosion in metals?
A. High temperature
B. Oxidation reaction
C. Physical erosion
D. Cavitation
Answer: B. Oxidation reaction
Corrosion is typically an electrochemical oxidation process.
10.The unit of dynamic viscosity in SI is:
A. N·s/m²
B. N/m²
C. Pa·s
D. m²/s
Answer: C. Pa·s
1 Pa·s = 1 N·s/m², the SI unit for dynamic viscosity.
11.Which law relates voltage, current, and resistance?
A. Boyle’s law
B. Newton’s law
C. Ohm’s law
D. Hooke’s law
Answer: C. Ohm’s law
V = I R defines the linear relation in resistive circuits.
12.The maximum shear stress in a solid circular shaft occurs at:
A. Center
B. Surface
C. Mid-radius
D. Quarter-radius