Important Answers: Design of Energy Storing Elements

1.       Define surging of springs.     

          The spring material is subjected to higher stresses, which may cause early fatigue failure of springs. This effect is called as surging of springs.   

2.       Define mechanical advantage of a lever. 

          It is the ratio of load lifted to the effort applied. 

3.       Define Resilience of a spring.

          It is the amount of energy absorbed by the spring per unit deflection.      

4.       Define free length of spring?

          It is length of spring is the free or unloading condition.

5.       What is the function of a flywheel?         

          A flywheel is a machine member serves a reservoir which stores energy during the period when the supply of energy is more than the requirement and releases it during the period when the requirement of energy is more than the supply.

6.       Define co-efficient of fluctuation of energy in a flywheel.

It is the ratio of fluctuation of energy to the work done per cycle.

7.       Define free length of a spring?

It is length of spring is the free or unloading condition.

State any two important applications of leaf spring?

The leaf springs are commonly used in automobile.

Define : Leaf springs

A leaf spring consists of flat bars of varying lengths clamped together and supported at both ends, thus acting as a simply supported beam.

What are the stresses induced in flywheel arms?

Tensile stress due to centrifugal force.

Bending stress due to Torque.

          Stress due to belt tension.

          Specify the types of flywheel.

          Solid piece flywheel.

a. Web type          b. Rim and hub type.

          Split wheel

a. Rim and hub type only

          Classify the helical springs.

          Close – coiled or tension helical spring.

          Open –coiled or compression helical spring.

          What are the various types of springs?

          Helical springs

          Spiral springs

          Leaf springs

          Disc spring or Belleville springs

          State any two functions of springs.

          To measure forces in spring balance, meters and engine indicators.

          To store energy.

What is a spring?

A spring is an elastic member, which deflects, or distorts under the action of load and regains its original shape after the load is removed.

15. State the following term.

1.Leverage 2. Load on the lever.

          Leverage = Length of effort arm / Length of load arm

          Load on the lever = magnitude of load applied on the lever