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 no of degree of freedom vibration.a. Three degree of freedom vibration b. Two degree of freedom vibration c. Single degree of freedom vibration d. None of the above
Last Answer : b. Two degree of freedom vibration
Description : The equations of motion of a two degree of freedom system, are, in general: A. coupled B. linear C. uncoupled D. none of the above
Last Answer : A. coupled
Description : The equations of motion of a two-degree-of-freedom system can be expressed in terms of the displacement of either of the two masses.
Last Answer : True
Description : The number of degrees of freedom of a vibrating system depends on a. number of masses b. number of masses and degrees of freedom of each mass c. number of coordinates used to describe the position of each mass d. None of the above
Last Answer : b. number of masses and degrees of freedom of each mass
Description : The system which requires two coordinates independently to describe its motion completely is called a--- A. 2 DOF B. SDOF C. DOF D. None of above
Last Answer : A. 2 DOF
Description : In two degree of freedom system, the numbers of amplitude observed are A. OneB. Two C. Three D. None
Last Answer : B. Two
Description : The number of distinct natural frequencies for an n-degree-of-freedom system can be a. 1 b. ∞ c. n
Last Answer : c. n
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
Description : Co-ordinate coupling is an example of A. Single Degree of Freedom System B. Several Degree of Freedom System C. Two Degree of Freedom System D. None
Last Answer : C. Two Degree of Freedom System
Description : Identify the given system [fixed--spring—mass—spring—mass—spring--fixed] A. Single Degree of Freedom System B. Several Degree of Freedom System C. Two Degree of Freedom System D. None
Description : The relative amplitudes of different degrees of freedom in a two-degree-of-freedom system depend on the natural frequency.
Description : The mass, stiffness, and damping matrices of a two-degree-of-freedom system are symmetric.
Description : When a two-degree-of-freedom system is subjected to a harmonic force, the system vibrates at the a. frequency of applied force b. smaller natural frequency c. larger natural frequency d. None of the above
Last Answer : a. frequency of applied force
Description : The first critical speed of an automobile running on a sinusoidal road is calculated by (modeling it as a single degree of freedom system) A Resonance B Approximation C Superposition D Rayleigh quotient
Last Answer : A Resonance
Description : According to D' Alembert's principle, m (d 2 x/ dt 2 ) + c (dx/dt) + Kx =0 is the differential equation for damped free vibrations having single degree of freedom. What will be the solution to this differential equation if the system is ... Φ) C x = (A - Bt) e - ωt D x = X e - ξωt (cos ω d t + Φ)
Last Answer : A x = (A + Bt) e – ωt
Description : What is the effect on the undamped natural frequency of a single-degree-of-freedom system if the mass of the system is increased? A The frequency will increase B The frequency will stay the same C The frequency will decrease D None of these
Last Answer : C The frequency will decrease
Description : A single degree of freedom spring-mass system is subjected to a harmonic force of constant amplitude. For an excitation frequency of √3k/m , the ratio of the amplitude of steady state response to the static deflection of the spring is __________ A. 0.2 B. 0.5 C. 0.8 D. None of the above
Last Answer : B. 0.5
Description : According to D' Alembert's principle, m (d 2 x/ dt 2 ) + c (dx/dt) + Kx =0 is the differential equation for damped free vibrations having single degree of freedom. What will be the solution to this differential equation if the system is ... ) C. x = (A - Bt) e - ωt D. x = X e - ξωt (cos ω d t + Φ
Last Answer : A. x = (A + Bt) e – ωt
Description : According to D' Alembert's principle, m (d 2 x/ dt 2 ) + c (dx/dt) + Kx =0 is the A differential equation for damped free vibrations having single degree of freedom. What will be the solution to this differential equation if the system is ... (C)x = (A - Bt) e - ωt ( D )x = X e - ξωt (cos ω d t + Φ
Last Answer : ( A ) x = (A + Bt) e – ωt
Description : What is the effect on the undamped natural frequency of a single-degree-of- C freedom system if the mass of the system is increased? ( A ) The frequency will increase ( B ) The frequency will stay the same ( C ) The frequency will decrease ( D ) None of these
Last Answer : ( C ) The frequency will decrease
Description : The first critical speed of an automobile running on a sinusoidal road is calculated by (modeling it as a single degree of freedom system) a) Resonance b) Approximation c) Superposition d) Rayleigh quotient
Last Answer : a) Resonance
Description : According to D' Alembert's principle, m (d 2 x/ dt 2 ) + c (dx/dt) + Kx =0 is the differential equati damped free vibrations having single degree of freedom. What will be the solution to this differ equation if the system is critically ... c. x = (A - Bt) e - ωt d. x = X e - ξωt (cos ω d t + Φ)
Last Answer : a. x = (A + Bt) e – ωt
Description : What is the effect on the undamped natural frequency of a single-degree-of-freedom system if the stiffness of one or more of the springs is increased? (A) The frequency will increase (B) The frequency will stay the same (C) The frequency will decrease (D) None of these
Last Answer : (A) The frequency will increase
Description : What is the effect on the undamped natural frequency of a single-degree-of-freedom system if the mass of the system is increased? A) The frequency will increase (B) The frequency will stay the same (C) The frequency will decrease (D) None of these
Last Answer : (C) The frequency will decrease
Description : What are discrete parameter systems? *1 point (A) Systems which have infinite number of degree of freedom (B) Systems which have finite number of degree of freedom (C) Systems which have no degree of freedom (D) None of the above
Last Answer : (B) Systems which have finite number of degree of freedom
Description : What are discrete parameter systems? A. Systems which have infinite number of degree of freedom B. Systems which have finite number of degree of freedom C. Systems which have no degree of freedom D. None of the above
Last Answer : B. Systems which have finite number of degree of freedom
Description : What are discrete parameter systems?a. Systems which have infinite number of degree of freedom b. Systems which have finite number of degree of freedom c. Systems which have no degree of freedom d. None of the above
Last Answer : b. Systems which have finite number of degree of freedom
Description : The number of degrees of freedom in simple spring mass system is A. Zero B. One C. Two D. Three
Last Answer : B. One
Description : The number of degrees of freedom of a simple pendulum is: (a) 0 (b) 1 (c) 2
Last Answer : (b) 1
Description : During free vibration, different degrees of freedom oscillate at different frequencies.
Last Answer : False
Description : During free vibration, different degrees of freedom oscillate with different phase angles.
Description : Which of the following statements are TRUE for damped vibrations? (P) . For a system having critical damping, the value of the damping ratio is unity and system does not undergo a vibratory motion. (Q) . Logarithmic decrement method ... Q only (B) P and S only (C) P, Q and R only (D) Q and S only
Last Answer : (C) P, Q and R only
Description : The motion of a system executing harmonic motion with one natural frequency is known as _______ A. principal mode of vibration B. natural mode of vibration C. both a. and b. D. none of the above
Last Answer : C. both a. and b.
Description : The equation of motion for a vibrating system with viscous damping is d 2 x/dt 2 + c/m X dx/dt + s/m X x = 0 If the roots of this equation are real, then the system will be A. over damped B. under damped C. critically damped D. none of the mentioned
Last Answer : A. over damped
Description : The motion of a system executing harmonic motion with one natural frequency is known as _______ A) principal mode of vibration B) natural mode of vibration C) both a. and b. D)none of the above
Last Answer : C) both a. and b.
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 : The equation of motion for spring mass system includes A. Inertia Force B. Spring Force C. Both D. Gravitational force
Last Answer : C. Both
Description : The equation of motion for a vibrating system with viscous damping is d 2 x/dt 2 + c/m X dx/dt + k/m X x = 0 If the roots of this equation are real, then the system will be a) over damped b) under damped c) critically damped d) none of the mentioned Ans:a
Last Answer : a) over damped
Description : If harmonic motion of same frequency and same phase are superimposed in two perpendicular directions ( x and y) then, the resultant motion will be, A) circle B) An ellipse C) An square D) An rectangle
Last Answer : C) An square
Description : The resultant motion of two Simple Harmonic Motions will be A. Simple Harmonic MotionB. Periodic Motion C. Projectile Motion D. Zero
Last Answer : A. Simple Harmonic Motion
Description : Which of the following statements is/are true for coulomb damping? 1. Coulomb damping occurs due to friction between two lubricated surfaces2. Damping force is opposite to the direction of motion of vibrating body ... 2, 3 and statement 4 c. Only statement 2 d. All the above statements are true
Last Answer : c. Only statement 2
Description : What is meant by critical damping coefficient? * 1 point (A) Frequency of damped free vibrations is less than zero (B). The motion is a periodic in nature (C). Both a. and b. (D). None of the above
Last Answer : (C). Both a. and b.
Description : The accelerometer is used as a transducer to measure earthquake in Richter scale. Its design is based on the principle that A Its natural frequency is very low in comparison to the frequency ... is equal to the frequency of vibration D Measurement of vibratory motion is without any reference point
Last Answer : C Its natural frequency is equal to the frequency of vibration
Description : What is meant by critical damping coefficient? A Frequency of damped free vibrations is less than zero B The motion is aperiodic in nature C Both a. and b. D None of the above
Last Answer : B The motion is aperiodic in nature
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 velocity vector in a vector diagram for a harmonic motion A Lags the displacement vector by 180 0 B Lags the displacement vector by 90 0 C Leads the displacement vector by 90 0 D Leads the displacement vector by 180 0
Last Answer : C Leads the displacement vector by 90 0
Description : When a body moves with simple harmonic motion, the product of its periodic time and frequency is equal to A. Zero B. One C. π/2 D. 2π
Description : The maximum acceleration of a particle moving with simple harmonic motion is ____. A. ω B. ω.r C. ω / 2 π D. 2 π / ω
Last Answer : B. ω.r