PE (Professional Engineer) Exam
Questions And Correct Answers
(Verified Answers) Plus Rationales
2025/2026 Q&A
1. What is the SI unit of force?
A. Joule
B. Watt
C. Newton
D. Pascal
Answer: C. Newton
Rationale: The Newton (N) is defined as the force required to
accelerate 1 kg of mass at 1 m/s².
2. Stress is defined as:
A. Force × Area
B. Force ÷ Area
C. Area ÷ Force
D. Force × Length
Answer: B. Force ÷ Area
Rationale: Stress equals applied force divided by the cross-sectional
area.
3. The modulus of elasticity represents:
A. Strength of material
B. Stiffness of material
,C. Toughness
D. Hardness
Answer: B. Stiffness of material
Rationale: Modulus of elasticity measures resistance to deformation.
4. Which law states that stress is proportional to strain within
elastic limits?
A. Newton’s Law
B. Pascal’s Law
C. Hooke’s Law
D. Bernoulli’s Law
Answer: C. Hooke’s Law
Rationale: Hooke’s Law defines the linear relationship between stress
and strain.
5. The unit of pressure in SI units is:
A. Newton
B. Joule
C. Watt
D. Pascal
Answer: D. Pascal
Rationale: Pressure is measured in Pascals (Pa), equal to N/m².
6. The moment of inertia depends on:
A. Material density
B. Shape of cross-section
C. Temperature
D. Weight
,Answer: B. Shape of cross-section
Rationale: Moment of inertia is determined by geometry, not
material.
7. The centroid of a rectangle lies at:
A. One corner
B. Midpoint of base
C. Intersection of diagonals
D. Edge midpoint
Answer: C. Intersection of diagonals
Rationale: The centroid is located at the geometric center.
8. Which type of load acts perpendicular to a beam axis?
A. Axial
B. Torsional
C. Transverse
D. Longitudinal
Answer: C. Transverse
Rationale: Transverse loads act perpendicular to the beam axis.
9. Shear force causes:
A. Compression only
B. Sliding between layers
C. Bending only
D. Twisting
Answer: B. Sliding between layers
Rationale: Shear stresses cause adjacent layers to slide.
, 10. The area under a velocity-time graph represents:
A. Acceleration
B. Force
C. Displacement
D. Speed
Answer: C. Displacement
Rationale: The integral of velocity over time gives displacement.
11. The derivative of displacement with respect to time gives:
A. Acceleration
B. Velocity
C. Force
D. Momentum
Answer: B. Velocity
Rationale: Velocity equals rate of change of displacement.
12. In statics, equilibrium requires:
A. Only forces equal zero
B. Sum of forces and moments equal zero
C. Only moments equal zero
D. Velocity zero
Answer: B. Sum of forces and moments equal zero
Rationale: Static equilibrium requires both force and moment
balance.
13. Work is defined as:
A. Force ÷ Distance
B. Force × Distance
Questions And Correct Answers
(Verified Answers) Plus Rationales
2025/2026 Q&A
1. What is the SI unit of force?
A. Joule
B. Watt
C. Newton
D. Pascal
Answer: C. Newton
Rationale: The Newton (N) is defined as the force required to
accelerate 1 kg of mass at 1 m/s².
2. Stress is defined as:
A. Force × Area
B. Force ÷ Area
C. Area ÷ Force
D. Force × Length
Answer: B. Force ÷ Area
Rationale: Stress equals applied force divided by the cross-sectional
area.
3. The modulus of elasticity represents:
A. Strength of material
B. Stiffness of material
,C. Toughness
D. Hardness
Answer: B. Stiffness of material
Rationale: Modulus of elasticity measures resistance to deformation.
4. Which law states that stress is proportional to strain within
elastic limits?
A. Newton’s Law
B. Pascal’s Law
C. Hooke’s Law
D. Bernoulli’s Law
Answer: C. Hooke’s Law
Rationale: Hooke’s Law defines the linear relationship between stress
and strain.
5. The unit of pressure in SI units is:
A. Newton
B. Joule
C. Watt
D. Pascal
Answer: D. Pascal
Rationale: Pressure is measured in Pascals (Pa), equal to N/m².
6. The moment of inertia depends on:
A. Material density
B. Shape of cross-section
C. Temperature
D. Weight
,Answer: B. Shape of cross-section
Rationale: Moment of inertia is determined by geometry, not
material.
7. The centroid of a rectangle lies at:
A. One corner
B. Midpoint of base
C. Intersection of diagonals
D. Edge midpoint
Answer: C. Intersection of diagonals
Rationale: The centroid is located at the geometric center.
8. Which type of load acts perpendicular to a beam axis?
A. Axial
B. Torsional
C. Transverse
D. Longitudinal
Answer: C. Transverse
Rationale: Transverse loads act perpendicular to the beam axis.
9. Shear force causes:
A. Compression only
B. Sliding between layers
C. Bending only
D. Twisting
Answer: B. Sliding between layers
Rationale: Shear stresses cause adjacent layers to slide.
, 10. The area under a velocity-time graph represents:
A. Acceleration
B. Force
C. Displacement
D. Speed
Answer: C. Displacement
Rationale: The integral of velocity over time gives displacement.
11. The derivative of displacement with respect to time gives:
A. Acceleration
B. Velocity
C. Force
D. Momentum
Answer: B. Velocity
Rationale: Velocity equals rate of change of displacement.
12. In statics, equilibrium requires:
A. Only forces equal zero
B. Sum of forces and moments equal zero
C. Only moments equal zero
D. Velocity zero
Answer: B. Sum of forces and moments equal zero
Rationale: Static equilibrium requires both force and moment
balance.
13. Work is defined as:
A. Force ÷ Distance
B. Force × Distance
