Description : In which type of vibrations, amplitude of vibration goes on decreasing every cycle? A) Damped vibrations B) Undamped vibrations C) Both a. and b. D) None of the above
Last Answer : A) Damped vibrations
Description : In which type of vibrations, amplitude of vibration goes on decreasing every cycle? a. Damped vibrations b. Undamped vibrations c. Both a. and b. d. None of the above
Last Answer : a. Damped vibrations
Description : In damped vibrations, the amplitude of the resulting vibration gradually reduces. This is due to the reason that an amount of energy is always dissipated to overcome the ________ * 1 point (A) Frictional resistance (B) Work done(C) Fluid pressure (D) Air pressure
Last Answer : (A) Frictional resistance
Description : During resonance A the Vibrations remains unaffected B no vibration occurs C low amplitude of vibration occurs D high amplitude of vibration occurs
Last Answer : D high amplitude of vibration occurs
Description : In damped vibrations, the amplitude of the resulting vibration gradually reduces. This is due to the reason that an amount of energy is always dissipated to overcome the ________ a) Frictional resistance b) Work done c) Fluid pressure d) Air pressure
Last Answer : a) Frictional resistance
Description : In damped vibrations, the amplitude of the resulting vibration gradually diminishes. a) True b) False
Last Answer : a) True
Description : When there is a reduction in amplitude over every cycle of vibration, then the body is said to have A Free vibration B Forced vibration C Damped vibration D None of the mentioned
Last Answer : C Damped vibration
Description : When there is a reduction in amplitude over every cycle of vibration, then the body is said to have ( A ) Free vibration ( B ) Forced vibration ( C ) Damped vibration ( D ) None of the mentioned
Last Answer : ( C ) Damped vibration
Description : When there is a reduction in amplitude over every cycle of vibration, then the body is said to have a) free vibration b) forced vibration c) damped vibrationd) under damped vibration
Last Answer : c) damped vibration
Description : When there is a reduction in amplitude over every cycle of vibration, then the body is said to have a) free vibration b) forced vibration c) damped vibration d) under damped vibration
Description : When there is a reduction in amplitude over every cycle of vibration, then the body is said to have a) free vibration b) forced vibration c) damped vibration d) none of the mentioned
Description : Reduction in vibration amplitude after one complete cycle of single degree free vibration with dry friction damping is_____, if where F"= frictional force between mass and surface and k =stiffness of the system. a)4F/k a b) 2f/K C) 3F/k D)8F/k
Last Answer : a)4F/k
Description : Which of the following is a type of free vibration? A Longitudinal vibrations B Transverse vibrations C Torsional vibrations D A, B and C
Last Answer : D A, B and C
Description : Which of the following is a type of free vibration? A. Longitudinal vibrations B. Transverse vibrations C. Torsional vibrations D. A, B and C
Last Answer : D. A, B and C
Description : Which of the following is a type of free vibration? ( A ) Longitudinal vibrations ( C ) Torsional vibrations D ( B ) Transverse vibrations ( D ) A, B and C
Last Answer : ( D ) A, B and C
Description : In coulomb damping the frequency of damped vibrations is A Equal to that of undamped vibrations B Less than that of undamped vibrationsC More than that of undamped vibrations D Independent of the frequency of undamped vibration
Last Answer : A Equal to that of undamped vibrations
Description : Centrifugal absorber is used to reduce A) Centrifugal force in rotating system B) Torsional vibration of rotating system C) Vibration in linear system D) Transverse vibrations
Last Answer : B) Torsional vibration of rotating system
Description : In case of viscous damping the frequency of damped vibration is A) Equal to that of undamped vibrations B) Less than that of undamped vibrations C) Greater than that of undamped vibrations D) Independent than that of undamped vibrations
Last Answer : B) Less than that of undamped vibrations
Description : The vibrations can be controlled by A. Controlling the natural frequencies B. Using proper damping devices C. Introducing vibration absorbers and vibration isolators D. All the above
Last Answer : D. All the above
Description : What Are The Causes Of Vibration? a. Unbalanced centrifugal forces in the system. b. Elastic nature of the system. c. Winds may cause vibrations of certain systems such as electricity lines, telephones lines etc. d. All of the above
Last Answer : d. All of the above
Description : In steady state forced vibrations, the amplitude of vibrations at resonance is _____________ damping coefficient. A equal to B directly proportional to C inversely proportional to D independent of
Last Answer : C inversely proportional to
Description : In steady state forced vibrations, the amplitude of vibrations at resonance is __________ damping coefficient. A. Equal to B. Directly proportional to C. Inversely proportional toD. Independent of
Last Answer : C. Inversely proportional to
Description : In damped free vibrations, which parameters indicate vibrations? A) Natural frequency B) Rate of decay of amplitude C) Both a. and b. D) None of the above
Last Answer : C) Both a. and b.
Description : n steady state forced vibrations, the amplitude of vibrations at resonance is _____________ damping coefficient. a) equal to b) directly proportional to c) inversely proportional to d) independent of
Last Answer : c) inversely proportional to
Description : In damped free vibrations, which parameters indicate vibrations? a. Natural frequency b. Rate of decay of amplitude c. Both a. and b. d. None of the above
Last Answer : c. Both a. and b.
Description : In steady state forced vibrations, the amplitude of vibrations at resonance is _____________ damping coefficient. (A) equal to (B) directly proportional to (C) inversely proportional to (D) independent of
Last Answer : (C) inversely proportional to
Description : In steady state forced vibrations, the amplitude of vibrations at resonance is _____________ damping coefficient. a) equal to b) directly proportional toc) inversely proportional to d) independent of
Description : What is meant by node point? A. The point at which amplitude of vibration is maximum B. The point at which amplitude of vibration is minimum C. The point at which amplitude of vibration is zero D. None of the above
Last Answer : C. The point at which amplitude of vibration is zero
Description : If frequency of excitation of a forced vibration system with negligible damping is very close to natural frequency of the system, then the system will A) Execute harmonic motion of large amplitude B) Beat with a very high peak amplitude C) Perform aperiodic motion D) None of the above
Last Answer : A) Execute harmonic motion of large amplitude
Description : If ωmax is the frequency at which the peak amplitude occurs and ωn is the natural frequency of the system then In a forced vibration system with damping, the higher the damping, A) More will be ... and ωmax is independent of damping in this system D) The difference between ωn and ωmax will be zero
Last Answer : A) More will be the difference between ωn and ωmax
Description : In the case of steady state forced vibration at a resonance, the amplitude of vibration is A) Inversely proportional to damping coefficient B) Inversely proportional to damping ratio C) Inversely proportional to resonant frequency D) Directly proportional to resonant frequency
Last Answer : B) Inversely proportional to damping ratio
Description : A node means a section where the amplitude of vibration is A. Maximum B. Half of the maximum C. Zero D. 1⁄4 of the maximum
Last Answer : C. Zero
Description : When the frequency of external exciting force is equal to the natural frequency of the vibration of the system A. The amplitude of vibration is zero B. The amplitude of vibration is significantly small C. The amplitude of vibration is very large D. The amplitude does not change
Last Answer : C. The amplitude of vibration is very large
Description : During resonance A. High amplitude of vibration occurs B. Low amplitude of vibration occurs C. No vibration occurs D. Vibration remains unaffected
Last Answer : A. High amplitude of vibration occurs
Description : The advantage of critical damping is A. That vibrating body come to rest in smallest possible time B. There is no vibration C. That amplitude of vibration is maximum D. The amplitude of vibration is minimum
Last Answer : A. That vibrating body come to rest in smallest possible time
Description : In under damped vibrating system, the amplitude of vibration ______. (A) decreases linearly with time (B) increases linearly with time (C) decreases exponentially with time (D) increases exponentially with time
Last Answer : (C) decreases exponentially with time
Description : The number of cycles described in one second is known as _______. A period of vibration B cycle C frequency D all of the above
Last Answer : C frequency
Description : The motion completed during one time period is known as _______. A period of vibration B cycle C frequency D all of the above
Last Answer : B cycle
Description : The motion completed during one time period is known as _______. A. period of vibration B. cycle C. frequency D. all of the above
Last Answer : B. cycle
Description : . The motion completed during one time period is known as _______. A. period of vibration B. cycle C. frequency D. all of the above
Description : The number of cycles described in one second is known as _______. C ( A ) period of vibration ( B ) cycle ( C ) frequency ( D ) all of the above
Last Answer : C ) frequency
Description : The motion completed during one time period is known as _______. B ( A ) period of vibration ( B ) cycle ( C ) frequency ( D ) all of the above
Last Answer : ( B ) cycle
Description : In coulomb damping, the amplitude of motion in each cycle is reduced by A. F/K B. 2F/K C. 4F/K D. F/4K
Last Answer : C. 4F/K
Description : Which type of frequency measuring instrument has multiple reeds of different natural frequency to measure vibrations? A. Fullarton tachometer B. Frahm Tachometer C. Both A. and B. D. None of the above
Last Answer : B. Frahm Tachometer
Description : During transverse vibrations, shaft is subjected to which type of stresses? A) Tensile stresses B) Torsional shear stress C) Bending stresses D) All of the above
Last Answer : C) Bending stresses
Description : Which type of vibrations are also known as transient vibrations? A) Undamped vibrations B) Damped vibrations C) Torsional vibrations D) Transverse vibrations
Last Answer : B) Damped vibrations
Description : During transverse vibrations, shaft is subjected to which type of stresses? a. Tensile stresses b. Torsional shear stress c. Bending stresses d. All of the above
Last Answer : c. Bending stresses
Description : Which type of vibrations are also known as transient vibrations? a. Undamped b. Damped c. Torsional d. Transverse vibrations
Last Answer : b. Damped
Description : From the following, which one is a type of vibration measuring instrument? A Mechanical B Electrical C Magnetic D All of the above
Last Answer : D All of the above
Description : In the diagram shown below, if rotor X and rotor Z rotate in same direction and rotor Y rotates in opposite direction, then specify the type of node vibration. A. Three node vibration B. Two node vibration C. Single node vibration D. None of the above
Last Answer : B. Two node vibration