100 Questions Mech

Engineering Quiz

Which of the following is NOT a condition for equilibrium of a rigid body?

• The sum of the forces acting on the body must be equal to zero.
• The sum of the moments acting on the body must be equal to zero.
• The body must be at rest.
• The body must be moving with constant velocity. (Correct Answer)

Strength of Materials

Which of the following materials has the highest yield strength?

• Steel (Correct Answer)
• Aluminum
• Copper
• Plastic

Machine Design

Which of the following types of bearings is best suited for applications where high speeds and low loads are involved?

• Ball bearings
• Roller bearings
• Sleeve bearings
• Needle bearings (Correct Answer)

Kinematics and Dynamics of Machines

Which of the following types of mechanisms is used to convert rotary motion into linear motion?

• Cam and follower
• Crank and slider (Correct Answer)
• Geneva wheel
• Rack and pinion

Thermodynamics

Which of the following is NOT a state function?

• Internal energy
• Enthalpy
• Entropy
• Temperature (Correct Answer)

Heat Transfer

Which of the following modes of heat transfer is the most efficient?

• Conduction
• Convection
• Radiation (Correct Answer)

Fluid Mechanics

Which of the following forces acts perpendicular to the direction of flow?

• Pressure force
• Viscous force
• Buoyancy force
• Drag force (Correct Answer)

Manufacturing Processes

Which of the following manufacturing processes is best suited for producing large quantities of identical parts?

• Casting (Correct Answer)
• Forging
• Machining
• 3D printing

Industrial Engineering

Which of the following is NOT a principle of lean manufacturing?

• Eliminate waste
• Just-in-time production
• Continuous improvement
• Economy of scale (Correct Answer)

Instrumentation and Control

Which of the following types of controllers is best suited for applications where a high degree of precision is required?

• Proportional-integral-derivative (PID) controller (Correct Answer)
• On-off controller
• Fuzzy logic controller
• Neural network controller

Engineering Materials

Which of the following materials is best suited for applications where high strength and corrosion resistance are required?

• Stainless steel (Correct Answer)
• Aluminum
• Titanium
• Carbon fiber