mech c.o Reviewer

1. What type of stress combination affects the fatigue life of marine pipelines especially for tanker vessels?

• - A) Torsional and bending stress
• - B) Bending and shear stress
• - C) Compressive and tensile stress
• - D) Shear and hydrostatic stress

2. In marine engineering, what is the primary purpose of calculating hydrostatic pressure?

• - A) to assess propeller efficiency
• - B) to evaluate hull stability
• - C) to measure engine performance
• - D) to assess hull strength

3. Any rotating object or assembly which is relatively long in the axial direction compared to the radial direction requires ______ for complete balance.

• A) Static balancing
• - B) Dynamic balancing
• - C) Inertial balancing
• - D) Harmonic balancing

4. Which marine equipment experiences periodic vibrations due to wave-induced forces?

• - A) Anchor chain
• - B) Propeller shaft
• - C) Rudder assembly
• - D) Bilge pump

5. What is the significance of added-mass in potential flow analysis?

• - A) It accounts for gravitational forces
• - B) It accounts for the buoyancy of the object
• - C) It accounts for the inertia of surrounding fluid
• - D) It accounts for drag forces

6. A stress that is due to opposite force away from each other.

• - A) Torsional stress
• - B) Compressive stress
• - C) Shear stress
• - D) Tensile stress

7. Which stress combination is crucial for assessing the fatigue life of ship structure?

• - A) Torsional and bending stress
• - B) Combined stress
• - C) Shear and hydrostatic stress
• - D) Compressive and tensile stress

8. What is the purpose of model testing in marine hydrodynamics?

• - A) to predict weather patterns
• - B) to assess hull integrity
• - C) to validate theoretical predictions
• - D) to optimize cargo distribution

9. What rotational motion of a ship occurs about longitudinal axis?

• - A) Heaving
• - B) Pitching
• - C) Rolling
• - D) Yawing

10. Is the condition in which a time-dependent force can transmit large amounts of energy to an oscillating object, leading to a large amplitude motion.

• - A) Damping
• - B) Inertia
• - C) Resonance
• - D) Harmonic motion