ENGINEERING MECHANICS FINAL (ENG
MECH) — CERTIFICATION PRACTICE
EXAM Newest 2026-2027 Updated
Practice Exam | 100 Most Tested
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1. A particle is in equilibrium when:
A. Acceleration is maximum
B. Velocity is increasing
C. Net force acting on it is zero
D. Momentum is changing
Answer: C. Net force acting on it is zero
Rationale: In static equilibrium, the key condition is that the resultant (net) force =
0, meaning no acceleration occurs.
2. The SI unit of force is:
A. Joule
B. Newton
C. Pascal
D. Watt
,Answer: B. Newton
Rationale: Force is measured in Newtons (N) according to Newton’s Second Law.
3. Newton’s Second Law is expressed as:
A. F = m/a
B. F = ma
C. F = mv
D. F = m + a
Answer: B. F = ma
Rationale: The law states force equals mass × acceleration.
4. A body remains at rest or uniform motion due to:
A. Inertia
B. Friction
C. Gravity
D. Impulse
Answer: A. Inertia
Rationale: Inertia is the resistance of a body to change in its state of motion.
5. The moment of a force is defined as:
A. Force × distance perpendicular
B. Force ÷ distance
C. Mass × velocity
D. Force × time
Answer: A. Force × distance perpendicular
Rationale: Moment = force × perpendicular distance from pivot.
,6. The center of gravity of a uniform rod is at:
A. One end
B. 1/4 length
C. Midpoint
D. 3/4 length
Answer: C. Midpoint
Rationale: A uniform object has its mass evenly distributed, so the center is at the
midpoint.
7. The SI unit of work is:
A. Newton
B. Watt
C. Joule
D. Pascal
Answer: C. Joule
Rationale: Work is force × displacement, measured in Joules (J).
8. Work is done when:
A. Force is applied with no displacement
B. Displacement occurs in direction of force
C. Velocity is zero
D. Acceleration is constant
Answer: B. Displacement occurs in direction of force
Rationale: Work requires force and displacement in same direction component.
9. Kinetic energy formula is:
, A. mv
B. 1/2 mv²
C. mgh
D. Fd
Answer: B. 1/2 mv²
Rationale: Kinetic energy depends on mass and square of velocity.
10. Potential energy due to height is:
A. mv²
B. mgh
C. Fd
D. ma
Answer: B. mgh
Rationale: Gravitational potential energy = mass × gravity × height.
11. A force system is coplanar when:
A. Forces act in same direction
B. Forces lie in one plane
C. Forces are equal
D. Forces act at a point
Answer: B. Forces lie in one plane
Rationale: Coplanar systems act within a single geometric plane.
12. A couple produces:
A. Linear motion
B. No rotation
MECH) — CERTIFICATION PRACTICE
EXAM Newest 2026-2027 Updated
Practice Exam | 100 Most Tested
Questions & Verified Detailed Answers
| Tutor Verified Success Bundle
1. A particle is in equilibrium when:
A. Acceleration is maximum
B. Velocity is increasing
C. Net force acting on it is zero
D. Momentum is changing
Answer: C. Net force acting on it is zero
Rationale: In static equilibrium, the key condition is that the resultant (net) force =
0, meaning no acceleration occurs.
2. The SI unit of force is:
A. Joule
B. Newton
C. Pascal
D. Watt
,Answer: B. Newton
Rationale: Force is measured in Newtons (N) according to Newton’s Second Law.
3. Newton’s Second Law is expressed as:
A. F = m/a
B. F = ma
C. F = mv
D. F = m + a
Answer: B. F = ma
Rationale: The law states force equals mass × acceleration.
4. A body remains at rest or uniform motion due to:
A. Inertia
B. Friction
C. Gravity
D. Impulse
Answer: A. Inertia
Rationale: Inertia is the resistance of a body to change in its state of motion.
5. The moment of a force is defined as:
A. Force × distance perpendicular
B. Force ÷ distance
C. Mass × velocity
D. Force × time
Answer: A. Force × distance perpendicular
Rationale: Moment = force × perpendicular distance from pivot.
,6. The center of gravity of a uniform rod is at:
A. One end
B. 1/4 length
C. Midpoint
D. 3/4 length
Answer: C. Midpoint
Rationale: A uniform object has its mass evenly distributed, so the center is at the
midpoint.
7. The SI unit of work is:
A. Newton
B. Watt
C. Joule
D. Pascal
Answer: C. Joule
Rationale: Work is force × displacement, measured in Joules (J).
8. Work is done when:
A. Force is applied with no displacement
B. Displacement occurs in direction of force
C. Velocity is zero
D. Acceleration is constant
Answer: B. Displacement occurs in direction of force
Rationale: Work requires force and displacement in same direction component.
9. Kinetic energy formula is:
, A. mv
B. 1/2 mv²
C. mgh
D. Fd
Answer: B. 1/2 mv²
Rationale: Kinetic energy depends on mass and square of velocity.
10. Potential energy due to height is:
A. mv²
B. mgh
C. Fd
D. ma
Answer: B. mgh
Rationale: Gravitational potential energy = mass × gravity × height.
11. A force system is coplanar when:
A. Forces act in same direction
B. Forces lie in one plane
C. Forces are equal
D. Forces act at a point
Answer: B. Forces lie in one plane
Rationale: Coplanar systems act within a single geometric plane.
12. A couple produces:
A. Linear motion
B. No rotation
