Do the following statements agree with the information that you\'ve learned in t

Question

Do the following statements agree with the information that you've learned in the class? State your answer with "True"or "False" with suitable explanations. [10 points (a) Double universal joint can provide the shaft running with a constant velocity (b) Flywheel is a device that acts as an energy reservoir by storing and supplying mechanical energy when required. (c) Flywheels can be applied at reciprocating engines, toy cars or gyroscopes (d) If two shafts are perfectly aligned, they are said to be collinear. However, shafts are usually out of alignment, with the misalignment taking two forms: offset and angular misalignment. (e) critical speed of rotating shafts can be analyzed with Rayleigh or Dunkerly equation.

Explanation / Answer

Answers:

(a) True, For constant velocity ratio of driving and driven shafts, an indermediate shaft with universal joint at each end is used. This type of joint is known as double universal joint.

(b) True, Flywheel used in machines serves as a resevoir, which stores energy during the period when the supply of energy is more than requirement, and releases it during the period when the requirement of energy is more than supply.

(c) True, In case of reciprocating engine, the energy is develop during one stroke and the engine run for whole cycle on the energy produce during that one stroke which is stored in the fiywheel

(d) True

(e) True, critical speed of rotating shaft analyzed by Rayleigh - Ritz method or dunkerly equation

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