Machine Quiz

What is a machine?

• A device used to overcome a large resistive force

• A device used for communication

• A device used for cooking

• A device used to generate electricity

What is the ratio of load to effort known as?

• Mechanical Advantage

• Velocity Ratio

• Work Input

• Efficiency

What is the condition for a force multiplier in terms of Mechanical Advantage?

• MA < 1

• MA = 0

• MA = 1

• MA > 1

What is the principle of a lever based on?

• Energy

• Acceleration

• Velocity

• Moments

In a Class II Lever, where is the load positioned?

• Between effort and fulcrum

• At the fulcrum

• Between fulcrum and load

• Between effort and load

What is the value of Mechanical Advantage if effort arm is equal to load arm in a lever?

• 1

• 3

• 0

• 2

What is the ideal condition for a lever?

• Rod is heavy and friction at the fulcrum

• Rod is weightless and no friction at the fulcrum

• Rod is elastic and no friction at the fulcrum

• Rod is rigid and friction at the fulcrum

What is the relationship between Efficiency, Mechanical Advantage, and Velocity Ratio?

• MA = VR + η

• MA = VR x η

• MA = VR / η

• MA = VR - η

What is the condition for a speed multiplier in terms of Velocity Ratio?

• VR < 1

• VR = 1

• VR = 0

• VR > 1

What is the loss in energy in an actual machine mainly due to?

• Friction and weight of moving parts

• Lack of electricity

• Excessive heat

• Lack of lubrication