NUR 257 Complete Exam Bundle (1, 2, 3, 4)
– 150-Question Practice Exam
Section I: Measurement, Units, and Vectors (1–15)
1. Which of the following is a base SI unit?
A. Newton
B. Joule
C. Kilogram
D. Watt
Correct Answer: C
Rationale: The kilogram is a base SI unit. Newton, joule, and watt are derived units.
2. How many significant figures are in 0.004560?
A. 3
B. 4
C. 5
D. 7
Correct Answer: B
Rationale: Leading zeros are not significant. The digits 4, 5, 6, and the trailing zero after the
decimal are significant, giving 4 significant figures.
3. Convert 3.5 km to meters.
A. 0.0035 m
B. 35 m
C. 350 m
D. 3500 m
Correct Answer: D
Rationale: 1 km = 1000 m, so 3.5 km × 1000 = 3500 m.
4. Which of the following is a vector quantity?
,A. Mass
B. Temperature
C. Velocity
D. Speed
Correct Answer: C
Rationale: Velocity has both magnitude and direction, making it a vector. Mass,
temperature, and speed are scalars.
5. A vector has components Ax = 3 m and Ay = 4 m. What is its magnitude?
A. 5 m
B. 7 m
C. 12 m
D. 25 m
Correct Answer: A
Rationale: Magnitude = √(3² + 4²) = √25 = 5 m.
6. What is the direction of the vector with Ax = 3 m and Ay = 4 m?
A. 37°
B. 45°
C. 53°
D. 60°
Correct Answer: C
Rationale: θ = tan⁻¹(4/3) = 53°.
7. The prefix "micro" represents:
A. 10⁻³
B. 10⁻⁶
C. 10⁻⁹
D. 10⁻¹²
Correct Answer: B
Rationale: Micro (μ) = 10⁻⁶.
,8. The prefix "giga" represents:
A. 10⁶
B. 10⁹
C. 10¹²
D. 10³
Correct Answer: B
Rationale: Giga (G) = 10⁹.
9. How many meters are in 1 light-year?
A. 9.46 × 10¹² m
B. 9.46 × 10¹⁵ m
C. 9.46 × 10¹⁸ m
D. 9.46 × 10²¹ m
Correct Answer: B
Rationale: 1 light-year ≈ 9.46 × 10¹⁵ m.
10. Dimensional analysis of energy yields:
A. MLT⁻²
B. ML²T⁻²
C. MLT⁻¹
D. ML²T⁻³
Correct Answer: B
Rationale: Energy (joule) = kg·m²/s² = ML²T⁻².
11. The dot product of two perpendicular vectors is:
A. Maximum
B. Zero
C. Negative
D. Undefined
Correct Answer: B
Rationale: The dot product A·B = ABcosθ. For θ = 90°, cos90° = 0.
, 12. The cross product of two parallel vectors is:
A. Maximum
B. Zero
C. Negative
D. Undefined
Correct Answer: B
Rationale: The cross product A×B = ABsinθ. For θ = 0°, sin0° = 0.
13. Which of the following is a scalar quantity?
A. Displacement
B. Acceleration
C. Force
D. Energy
Correct Answer: D
Rationale: Energy is a scalar. Displacement, acceleration, and force are vectors.
14. The SI unit of force is the:
A. Joule
B. Newton
C. Watt
D. Pascal
Correct Answer: B
Rationale: The newton (N) = kg·m/s².
15. The SI unit of power is the:
A. Joule
B. Newton
C. Watt
D. Pascal
Correct Answer: C
Rationale: The watt (W) = J/s.
– 150-Question Practice Exam
Section I: Measurement, Units, and Vectors (1–15)
1. Which of the following is a base SI unit?
A. Newton
B. Joule
C. Kilogram
D. Watt
Correct Answer: C
Rationale: The kilogram is a base SI unit. Newton, joule, and watt are derived units.
2. How many significant figures are in 0.004560?
A. 3
B. 4
C. 5
D. 7
Correct Answer: B
Rationale: Leading zeros are not significant. The digits 4, 5, 6, and the trailing zero after the
decimal are significant, giving 4 significant figures.
3. Convert 3.5 km to meters.
A. 0.0035 m
B. 35 m
C. 350 m
D. 3500 m
Correct Answer: D
Rationale: 1 km = 1000 m, so 3.5 km × 1000 = 3500 m.
4. Which of the following is a vector quantity?
,A. Mass
B. Temperature
C. Velocity
D. Speed
Correct Answer: C
Rationale: Velocity has both magnitude and direction, making it a vector. Mass,
temperature, and speed are scalars.
5. A vector has components Ax = 3 m and Ay = 4 m. What is its magnitude?
A. 5 m
B. 7 m
C. 12 m
D. 25 m
Correct Answer: A
Rationale: Magnitude = √(3² + 4²) = √25 = 5 m.
6. What is the direction of the vector with Ax = 3 m and Ay = 4 m?
A. 37°
B. 45°
C. 53°
D. 60°
Correct Answer: C
Rationale: θ = tan⁻¹(4/3) = 53°.
7. The prefix "micro" represents:
A. 10⁻³
B. 10⁻⁶
C. 10⁻⁹
D. 10⁻¹²
Correct Answer: B
Rationale: Micro (μ) = 10⁻⁶.
,8. The prefix "giga" represents:
A. 10⁶
B. 10⁹
C. 10¹²
D. 10³
Correct Answer: B
Rationale: Giga (G) = 10⁹.
9. How many meters are in 1 light-year?
A. 9.46 × 10¹² m
B. 9.46 × 10¹⁵ m
C. 9.46 × 10¹⁸ m
D. 9.46 × 10²¹ m
Correct Answer: B
Rationale: 1 light-year ≈ 9.46 × 10¹⁵ m.
10. Dimensional analysis of energy yields:
A. MLT⁻²
B. ML²T⁻²
C. MLT⁻¹
D. ML²T⁻³
Correct Answer: B
Rationale: Energy (joule) = kg·m²/s² = ML²T⁻².
11. The dot product of two perpendicular vectors is:
A. Maximum
B. Zero
C. Negative
D. Undefined
Correct Answer: B
Rationale: The dot product A·B = ABcosθ. For θ = 90°, cos90° = 0.
, 12. The cross product of two parallel vectors is:
A. Maximum
B. Zero
C. Negative
D. Undefined
Correct Answer: B
Rationale: The cross product A×B = ABsinθ. For θ = 0°, sin0° = 0.
13. Which of the following is a scalar quantity?
A. Displacement
B. Acceleration
C. Force
D. Energy
Correct Answer: D
Rationale: Energy is a scalar. Displacement, acceleration, and force are vectors.
14. The SI unit of force is the:
A. Joule
B. Newton
C. Watt
D. Pascal
Correct Answer: B
Rationale: The newton (N) = kg·m/s².
15. The SI unit of power is the:
A. Joule
B. Newton
C. Watt
D. Pascal
Correct Answer: C
Rationale: The watt (W) = J/s.
