Q. When it can be confirmed that critical speed of shaft is occuring? A. Shaft vibrates violently in transverse direction B. Shaft vibrates violently in linear direction C. Shaft vibrates violently in longitudinal direction D. Shaft vibrates violently in circular direction Answer & Explaination Discuss Answer : Option:- A Explanation : Discuss here! No Explaination Available for These Question.
Q. What is the effect of a rotating mass of a shaft on a system? A. Bend the shaft B. Twist the shaft C. Extend the shaft D. Compress the shaft Answer & Explaination Discuss Answer : Option:- A Explanation : Discuss here! No Explaination Available for These Question.
Q. Free torsional vibrations will occur in a three rotor system only if all rotors have A. Same mass B. Same diameter C. Same frequency D. Same inertia Answer & Explaination Discuss Answer : Option:- C Explanation : Discuss here! No Explaination Available for These Question.
Q. Causes of vibration is/are A. unbalance force B. dry friction C. wind D. all of these Answer & Explaination Discuss Answer : Option:- D Explanation : Discuss here! No Explaination Available for These Question.
Q. Damping factor is the ratio of damping coefficient to A. critical damping coefficient B. damping coefficient C. none of these D. all of these Answer & Explaination Discuss Answer : Option:- A Explanation : Discuss here! No Explaination Available for These Question.
Q. Use of airplugs is noise control at A. Source B. Path C. Receiver D. Regulator Answer & Explaination Discuss Answer : Option:- C Explanation : Discuss here! No Explaination Available for These Question.
Q. Frequency in torsional vibrations is A. Dependent on no. of nodes B. Dependent on no. of rotors C. Dependent on nodes, no. of rotors as well D. None of the above Answer & Explaination Discuss Answer : Option:- C Explanation : Discuss here! No Explaination Available for These Question.
Q. Number of natural frequencies of a system depends on A. Number of masses B. Number of degrees of freedom C. Number of springs D. Number of dampers Answer & Explaination Discuss Answer : Option:- B Explanation : Discuss here! No Explaination Available for These Question.
Q. Determine logarithmic decrement, if the amplitude of a vibrating body reduces to 1/6th in two cycles. A. 0.223 B. 0.8958 C. 0.389 D. None of the above Answer & Explaination Discuss Answer : Option:- B Explanation : Discuss here! No Explaination Available for These Question.
Q. What is the Physical effect of Noise on Human beings? A. Loss of Hearing B. Loss of Vision C. Loss of Taste D. Loss of Smell Answer & Explaination Discuss Answer : Option:- A Explanation : Discuss here! No Explaination Available for These Question.