Description : From the following, which one is also known as low-frequency Transducer? (A) Stroboscope (B) Accelerometer (C) Vibrometer (D) None of the above
Last Answer : (C) Vibrometer
Description : In vibrometer, the relative motion between the mass and vibrating body is converted into proportional ________. (A) current (B) voltage (C) resistance (D) ampere
Last Answer : (B) voltage
Description : If the amplitude of harmonic motion is large, its frequency A) Will always be high B) Will always be less C) Can have any value D) Will be zero
Last Answer : C) Can have any value
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 : 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 : Which of the following statements is/are true? A. Torsional vibrations do not occur in a three rotor system, if rotors rotate in same direction B. Shaft vibrates with maximum frequency when rotors ... C. Zero node behavior is observed in rotors rotating in opposite direction D. All of the above
Last Answer : A. Torsional vibrations do not occur in a three rotor system, if rotors rotate in same direction
Description : The number of natural frequency in two rotor system is A Zero B Infinite C Two D One
Last Answer : C Two
Description : In energy method for finding frequency of the system A The sum of kinetic and potential energy is constant B The sum of kinetic and potential energy is zero C Frequency cannot be determined by energy method D None of the mentioned
Last Answer : A The sum of kinetic and potential energy is constant
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
Last Answer : B. One
Description : At which frequency ratio, phase angle increases as damping factor increases? A. When frequency ratio is less than unity B. When frequency ratio is more than unity C. When frequency ratio is zero D. All of the above
Last Answer : A. When frequency ratio is less than unity
Description : Which of the following statements is/are true? A) Torsional vibrations do not occur in a three rotor system, if rotors rotate in same direction B) Shaft vibrates with maximum frequency when rotors ... C) Zero node behavior is observed in rotors rotating in opposite direction D) All of the above
Last Answer : A) Torsional vibrations do not occur in a three rotor system, if rotors rotate in same direction
Description : Semi definite system having one of their natural frequency equal to A) Four B) Three C) Two D) Zero
Last Answer : D) Zero
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 : What is meant by critical damping coefficient? B ( 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 : 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 : Which of the following statements is/are true? a. Torsional vibrations do not occur in a three rotor system, if rotors rotate in same direction b. Shaft vibrates with maximum frequency when rotors ... c. Zero node behavior is observed in rotors rotating in opposite direction d. All of the above
Last Answer : a. Torsional vibrations do not occur in a three rotor system, if rotors rotate in same direction
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 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 : 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 : 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 ... is equal to the frequency of vibration (D) measurement of vibratory motion is without any reference poin
Last Answer : (C) its natural frequency is equal to the frequency of vibration
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 poin
Description : If the spring mass system with m and spring stiffness k is taken to very high altitude, the natural frequency of longitudinal vibrations * 1 point (A) increases (B) decreases (C) remain unchanged (D) may increase or decrease depending upon the value of the mass
Last Answer : (C) remain unchanged
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 the spring mass system with m and spring stiffness k is taken to very high altitude , the natural frequency of longitudinal vibrations A) Increases B) Decreases C) Remain unchanged D) May be increase or decrease depending upon the value of the mass
Last Answer : C) Remain unchanged
Description : f the spring displacement is high then the frequency of the spring increases. a) True b) False
Last Answer : b) False
Description : The speed at which the shaft runs so that the additional deflection of the shaft from the axis of rotation becomes ___________, is known as critical or whirling speed. (A) zero (B) minimum (C) maximum (D) infinite
Last Answer : (D) infinite
Description : In vibration isolation system, if ω/ωn < 2, then for all values of damping factor, the transmissibility will be A less than unity B equal to unity C greater than unity D zero
Last Answer : C greater than unity
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 : Dynamic vibration absorber is suitable for A varying speed machines B constant speed machines C Zero speed range machines D None of the mentioned
Last Answer : B constant speed machines
Description : In semi-definite system one of the natural frequencies is A Zero B One C Two D Infinite
Last Answer : A Zero
Description : A system is said to be over damped if the damping factor for the system is A More than one B Less than one C Equal to one D Equal to zero
Last Answer : A More than one
Description : A system is said to be under damped if the damping factor for the system is A More than one B Less than one C Equal to one D Equal to zero
Last Answer : B Less than one
Description : A system is said to be critically damped if the damping factor for a vibrating system is A Zero B Less than one C One D More than one
Last Answer : C One
Description : The number of natural frequencies in case of cantilever is A Zero B One C Two D Infinite
Last Answer : D Infinite
Description : As per Energy Method, the summation of kinetic energy and potential energy must be ________ which is same at all the times. A. zero B. minimum C. maximum D. constant
Last Answer : D. constant
Description : Dynamic vibration absorber is suitable for A) Constant speed machine B) Varying speed machine C) zero speed machine D) None of the above
Last Answer : A) Constant speed machine
Description : As per Energy Method, the summation of kinetic energy and potential energy must D be ________ which is same at all the times. ( A ) zero ( B ) minimum ( C ) maximum ( D ) constant
Last Answer : ( D ) constant
Description : Dynamic vibration absorber is suitable for A. Constant speed machines B. Varying speed machines C. Zero speed range machines D. None of the above
Last Answer : A. Constant speed machines
Description : In semidefinite system one of the natural frequencies is A. Zero B. Non-zero C. Infinite one D. One
Last Answer : A. Zero
Description : The number of natural frequencies in a two rotor system is A. Infinite B. Zero C. Two D. Four
Last Answer : C. Two
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 : A system is said to be overdamped if the damping factor is A. Equal to One B. Greater than One C. Less than one D. Equal to zero
Last Answer : B. Greater than One
Description : The system is said to be critically damped if the damping factor is A. Greater than one B. Equal to one C. Less than one D. Zero
Last Answer : B. Equal to one
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 : The number of degrees of freedom in simple spring mass system is A. Zero B. One C. Two D. Three
Description : In vibration isolation system, if ω/ω n < 2, then for all values of damping factor, the transmissibility will be a) less than unity b) equal to unity c) greater than unity d) zero
Last Answer : c) greater than unity
Description : The response of an Undamped system under resonance will be a. very large b. infinity c. zero
Last Answer : b. infinity
Description : As per Energy Method, the summation of kinetic energy and potential energy must be ________ which is same at all the times. (A) zero (B) minimum (C) maximum (D) constant
Last Answer : (D) constant
Description : n vibration isolation system, if ω/ω n is less than √2 , then for all values of the damping factor, the transmissibility will be a) less than unity b) equal to unity c) greater than unity d) zero