Description : Unit of damping factor is N/m/s. a) True b) False
Last Answer : b) False
Description : A vehicle suspension system consists of a spring and a damper. The stiffness of the spring is 3.6 kN/m and the damping constant of the damper is 400 Ns/m. If the mass is 50 kg, then the damping factor (d ) and damped natural ... , are a) 0.471 and 1.19 Hz b) 0.471 and 7.48 Hz c) 0.666 and 1.35 Hz
Last Answer : a) 0.471 and 1.19 Hz
Description : A vehicle suspension system consists of a spring and a damper. The stiffness of the spring is 3.6 kN/m and the damping constant of the damper is 400 Ns/m. If the mass is 50 kg, then the damping factor (d ) and damped natural ... .19 Hz b) 0.471 and 7.48 Hz c) 0.666 and 1.35 Hz d) 0.666 and 8.50 Hz
Description : The unit of the viscous damping coefficient is A N-m/sec B m/N-sec C N-sec-m D N-sec/m
Last Answer : D N-sec/m
Description : The damping factor is the measure of the relative amount of damping in the existing system with that necessary for the ______ system. (A) underdamped (B) overdamped (C) critical damped (D) all of the above
Last Answer : (C) critical damped
Description : Calculate damping ratio if mass = 200Kg, ω = 20rad/s and damping coefficient = 800 N/m/s A. 0.03 B. 0.04 C. 0.05 D. 0.06
Last Answer : A. 0.03
Description : A rotary system has a damping coefficient of 40 N-m-sec/rad. The damping torque at a velocity of 2 rad/s, will be A) 20 N-m B) 40 N-m C) 80 N-m D) 100 N-m
Last Answer : C) 80 N-m
Description : Find the equivalent damping constant of the system shown in Fig. for c1=22N.s/m and c2= 11N.s/m a) 40 N/m 2 b)38 N/m 2 c)44 N/m 2 d)8.8 N/m 2
Last Answer : c)44 N/m 2
Description : Calculate damping ratio from the following data: mass = 200Kg ω = 20rad/s damping coefficient = 1000 N/m/s a) 0.03 b) 0.04 c) 0.05 d) 0.06
Last Answer : b) 0.04
Description : Calculate damping ratio from the following data: mass = 200Kg ω = 20rad/s damping coefficient = 800 N/m/s a) 0.03 b) 0.04 c) 0.05 d) 0.06
Last Answer : a) 0.03
Description : Calculate critical damping coefficient in N/m/s from the following data: mass = 100Kg ω = 40rad/s a) 25,132 b) 26,132 c) 27,132 d) 28,132
Last Answer : a) 25,132
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 : 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
Description : A vehicle suspension system consists of a spring and a damper. Stiffness of spring is 3.5 KN/m and damping constant of damper is 400Ns/m. If mass is 50 kg, then damping factor is A 0.606 B 0.10 C 0.666 D 0.471
Last Answer : D 0.471
Description : A vibrating system having mass 1kg, a spring of stiffness 1000N/m and damping factor of 0.632 and it is put to harmonic excitation of 10N. Find the amplitude at resonance. A 0.079 B 7.9C 0.056 D 0.00791
Last Answer : D 0.00791
Description : Damping factor, ε = A. C/Cc B. C.Cc C. K/m D. K.m
Last Answer : A. C/Cc
Description : Calculate the value of critical damping coefficient if a vibrating system has mass of 4kg and stiffness of 100N/m A 20 N-sec/m B 40 N-sec/m C 60 N-sec/m D 80 N-sec/m
Last Answer : B 40 N-sec/m
Description : The units of viscous damping coefficient is A) N-m/sec B) m/N-sec C) N-sec/m D) N-m-sec
Last Answer : C) N-sec/m
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 : find the value of logarithmic decrement of a vibratory system if its natural frequency is 10rad/sec, its mass is 10kg and its damping constant is 100N.s/m a) 36.27 b)362.7 c)0.3627 d)3.627
Last Answer : d)3.627
Description : Fluid resistance causes damping which is known as ______ a) Resistance damping b) Fluid dampingc) Viscous damping d) Liquid damping
Last Answer : c) Viscous damping
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 : A simple pendulum is found to vibrate at a frequency of 0.5Hz in vacuum and0.45 Hz in a viscous fluid medium. Find the damping factor. 0.5122 (B) 0.9272 (C) 0.4359 (D) 0.2568
Last Answer : (C) 0.4359
Description : The ratio of the maximum displacement of the forced vibration to the deflection due to the static force, is known as A Damping factor B Damping coefficient C Logarithmic decrement D Magnification factor
Last Answer : D Magnification factor
Description : The ratio of the actual damping coefficient (c) to the critical damping coefficient (cc ) is known as _________ A Damping factor B Damping coefficient C Resistive factor D Resistive coefficient
Last Answer : A Damping factor
Description : Calculate logarithmic decrement if damping factor is 0.33. A 1.36 B 3.23 C 5.16D 2.19
Last Answer : D 2.19
Description : Calculate natural frequency of damped vibration, if damping factor is 0.52 and natural frequency of the system is 30 rad/sec which consists of machine supported on springs and dashpots. A 25.62 rad/sec B 20.78 rad/sec C 14.4 rad/sec D 15.33 rad/sec
Last Answer : A 25.62 rad/sec
Description : Calculate natural frequency of damped vibration, if damping factor is 0.52 and natural frequency of the system is 30 rad/sec which consists of machine supported on springs and dashpots. A 21 rad/sec B 25.62 rad/sec C 20.22 Hz D 3.15 Hz
Last Answer : B 25.62 rad/sec
Description : A simple pendulum is found to vibrate at a frequency of 0.5Hz in vacuum and 0.45Hz in a viscous fluid medium. Find the damping factor. A 0.5122 B 0.9237 C 0.4359 D 0.2568
Last Answer : C 0.4359
Description : Calculate logarithmic decrement if damping factor is 0.086 A 0.245 B 0.425 C 0.542 D 0.252
Last Answer : C 0.542
Description : The ratio of the maximum displacement of the forced vibration to the deflection due to the static force is known as A Logarithmic decrement B Magnification factor C Damping factor D None of the mentioned
Last Answer : B Magnification factor
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 : The ratio of actual damping coefficient to the critical damping coefficient is known as A Magnification Factor B Damping Factor C Logarithmic decrementD None of the mentioned
Last Answer : B Damping Factor
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 : Ratio of actual damping coefficient to critical damping coefficient is called A. Damping Factor B. Angular Factor C. Critical Factor D. None of above
Last Answer : A. Damping Factor
Description : In vibration isolation system, the transmissibility will be equal to unity, for all values of damping factor, if ω/ωn is A. Equal to 1 B. Equal to √2 C. Less than √2 D. Greater than √2
Last Answer : B. Equal to √2
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 : The ratio of the actual damping coefficient (c) to the critical damping coefficient (cc ) is known as _________ ( A ) Damping factor ( B ) Damping coefficient ( C ) Resistive factor ( D ) Resistive coefficient
Last Answer : ( A ) Damping factor
Description : Calculate logarithmic decrement if damping factor is 0.33. D ( A ) 1.36 ( B ) 3.23 ( C ) 5.16 ( D ) 2.19
Last Answer : D ) 2.19
Description : Calculate natural frequency of damped vibration, if damping factor is 0.52 and A natural frequency of the system is 30 rad/sec which consists of machine supported on springs and dashpots. ( A )25.62 rad/sec ( B )20.78 rad/sec ( C )14.4 rad/sec ( D )15.33 rad/sec
Last Answer : ( A )25.62 rad/sec
Description : The ratio of maximum displacement of the forced vibration to the deflection due to the static force, is known as A. Damping FactorB. Damping Coefficient C. Logarithmic Decrement D. Magnification Factor
Last Answer : D. Magnification Factor
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 : Calculate logarithmic decrement if damping factor is 0.33. a. 1.36 b. 3.23 c. 5.16 d. 2.19
Last Answer : d. 2.19
Description : Calculate natural frequency of damped vibration, if damping factor is 0.52 and natural frequ the system is 30 rad/sec which consists of machine supported on springs and dashpots. a. 25.62 rad/secb. 20.78 rad/sec c. 14.4 rad/sec d. 15.33 rad/sec
Last Answer : a. 25.62 rad/sec
Description : The ratio of the maximum displacement of the forced vibration to the deflection due to the static force, is known as a) Damping factor b) Damping coefficient c) Logarithmic decrement d) Magnification factor
Last Answer : d) Magnification factor
Description : If the damping factor for a vibrating system is unity, then the system will be (A) overdamped (B) underdamped (C) critically damped (D) without vibrations
Last Answer : (C) critically damped
Description : The ratio of the maximum displacement of the forced vibration to the deflection due to the static force is known as (A) damping factor (B) damping coefficient (C) logarithmic decrement (D) magnification factor
Last Answer : (D) magnification factor