When a periodic disturbing force is applied to a machine, the force is transmitted to the foundation by the means of spring. a) True b) False

When a periodic disturbing force is applied to a machine, the force is transmitted to
the foundation by the means of spring.
a) True
b) False
by

1 Answer

Answer :

a) True
by

Related questions

When a periodic disturbing force is applied to a machine, the force is transmitted to the ___________ by the means of spring. (A) dampers (B) foundation (C) mass (D) none of the above

Description : When a periodic disturbing force is applied to a machine, the force is transmitted to the ___________ by the means of spring. (A) dampers (B) foundation (C) mass (D) none of the above

Last Answer : (B) foundation

Calculate damped natural frequency, if a spring mass damper system is subjected to periodic disturbing force of 30 N. Damping coefficient is equal to 0.76 times of critical damping coefficient and undamped natural frequency is 5 rad/sec A. 3.99 rad/sec B. 2.13 rad/sec C. 4.12 rad/sec D. 3.24 rad/sec

Description : Calculate damped natural frequency, if a spring mass damper system is subjected to periodic disturbing force of 30 N. Damping coefficient is equal to 0.76 times of critical damping coefficient and undamped natural frequency is 5 rad/sec A. 3.99 rad/sec B. 2.13 rad/sec C. 4.12 rad/sec D. 3.24 rad/sec

Last Answer : D. 3.24 rad/sec

Which of the following is true regarding Ɛ>1? A. Transmitted force is greater than applied force B. Transmitted force is less than applied force C. Spring force is less than applied force D. Damping force is less than applied force

Description : Which of the following is true regarding Ɛ>1? A. Transmitted force is greater than applied force B. Transmitted force is less than applied force C. Spring force is less than applied force D. Damping force is less than applied force

Last Answer : A. Transmitted force is greater than applied force

Which of the following is true regarding Ɛ>1? a) Transmitted force is greater than applied force b) Transmitted force is less than applied force c) Spring force is less than applied force d) Damping force is less than applied forc

Description : Which of the following is true regarding Ɛ>1? a) Transmitted force is greater than applied force b) Transmitted force is less than applied force c) Spring force is less than applied force d) Damping force is less than applied forc

Last Answer : a) Transmitted force is greater than applied force

A vibrating machine of 100 kg is mounted on a rubber pad which has stiffness of 500 N/m. Determine force transmitted to the foundation if the unbalanced force 500 N acts on it. The frequency ratio (ω/ω n ) is 1.5 and ξ = 0.5 A. 461.62 N B. 400.23 N C. 450 N D. Insufficient data

Description : A vibrating machine of 100 kg is mounted on a rubber pad which has stiffness of 500 N/m. Determine force transmitted to the foundation if the unbalanced force 500 N acts on it. The frequency ratio (ω/ω n ) is 1.5 and ξ = 0.5 A. 461.62 N B. 400.23 N C. 450 N D. Insufficient data

Last Answer : A. 461.62 N

The ratio of the force transmitted to the force applied is known as the ____________ of the spring support. A. isolation factor B. transmissibility ratio C. both A and B D. none of the above

Description : The ratio of the force transmitted to the force applied is known as the ____________ of the spring support. A. isolation factor B. transmissibility ratio C. both A and B D. none of the above

Last Answer : C. both A and B

The ratio of the force transmitted to the force applied is known as the ____________ of the spring support. (A) isolation factor (B) transmissibility ratio (C) both A and B (D) none of the above

Description : The ratio of the force transmitted to the force applied is known as the ____________ of the spring support. (A) isolation factor (B) transmissibility ratio (C) both A and B (D) none of the above

Last Answer : (C) both A and B

In vibration isolation system, if ω/ωn, then the phase difference between the transmitted force and the disturbing force is A 0° B 90° C 180° D 270°

Description : In vibration isolation system, if ω/ωn, then the phase difference between the transmitted force and the disturbing force is A 0° B 90° C 180° D 270°

Last Answer : C 180°

In vibration isolation system, if ω/ω n > 1, then the phase difference between the transmitted force and the disturbing force is A. 0° B. 90° C. 180° D. 270°

Description : In vibration isolation system, if ω/ω n > 1, then the phase difference between the transmitted force and the disturbing force is A. 0° B. 90° C. 180° D. 270°

Last Answer : C. 180°

In vibration isolation system, if ω/ω n , then the phase difference between the transmitted force and the disturbing force is a) 0° b) 90° c) 180° d) 270°

Description : In vibration isolation system, if ω/ω n , then the phase difference between the transmitted force and the disturbing force is a) 0° b) 90° c) 180° d) 270°

Last Answer : c) 180°

If isolation factor is negative, then what is the phase difference between transmitted and disturbing force? a) 180° b) 90° c) 450° d) 360°

Description : If isolation factor is negative, then what is the phase difference between transmitted and disturbing force? a) 180° b) 90° c) 450° d) 360°

Last Answer : a) 180°

In vibration isolation system, if ω/ω n , then the phase difference between the transmitted force and the disturbing force is a) 0° b) 90° c) 180° d) 270

Description : In vibration isolation system, if ω/ω n , then the phase difference between the transmitted force and the disturbing force is a) 0° b) 90° c) 180° d) 270

Last Answer : c) 180°

In vibration isolation system, if ω/ω n > 1, then the phase difference between the transmitted force and the disturbing force is a) 0° b) 90° c) 180° d) 270°

Description : In vibration isolation system, if ω/ω n > 1, then the phase difference between the transmitted force and the disturbing force is a) 0° b) 90° c) 180° d) 270°

Last Answer : c) 180°

Which of the following is a type of transmitted force to the foundation? (A) Damping force (B) Undamping force (C) Tensile force (D) Torsional force

Description : Which of the following is a type of transmitted force to the foundation? (A) Damping force (B) Undamping force (C) Tensile force (D) Torsional force

Last Answer : (A) Damping force

Transmissibility in a support excitation system is defined by A) Ratio of absolute amplitude of the mass to the excitation amplitude of the support B) Reciprocal of (a) C) Ratio of the force transmitted to the foundation, to the equivalent force corresponding to maximum displacement excitation D) None of the above

Description : Transmissibility in a support excitation system is defined by A) Ratio of absolute amplitude of the mass to the excitation amplitude of the support B) Reciprocal of (a) C) Ratio of the ... the foundation, to the equivalent force corresponding to maximum displacement excitation D) None of the above

Last Answer : B) Reciprocal of (a)

Transmissibility in a force excitation system is defined by the ratio of the A) Maximum excitation force to the force transmitted to the foundation B) Force transmitted to the foundation, to the maximum excitation force C) Maximum static deflection of the ass to the deflection of the foundation D) None of the above

Description : Transmissibility in a force excitation system is defined by the ratio of the A) Maximum excitation force to the force transmitted to the foundation B) Force transmitted to the foundation, to the maximum ... Maximum static deflection of the ass to the deflection of the foundation D) None of the above

Last Answer : B) Force transmitted to the foundation, to the maximum excitation force

Which of the following is a type of transmitted force to the foundation? (A) Damping force (B) Undamping force (C) Tensile force (D) Torsional force

Description : Which of the following is a type of transmitted force to the foundation? (A) Damping force (B) Undamping force (C) Tensile force (D) Torsional force

Last Answer : (A) Damping force

Which of the following is a type of transmitted force to the foundation? a) Damping force b) Undamping force c) Tensile force d) Torsional force

Description : Which of the following is a type of transmitted force to the foundation? a) Damping force b) Undamping force c) Tensile force d) Torsional force

Last Answer : a) Damping force

Transmissibility is the ratio of a. force transmitted and exciting force b. force applied and the resulting displacement c. input displacement and output displacement

Description : Transmissibility is the ratio of a. force transmitted and exciting force b. force applied and the resulting displacement c. input displacement and output displacement

Last Answer : a. force transmitted and exciting force

During vibrations any machine has unbalanced force of 392N and if it transmitted force of magnitude 58.3N then transmissibility value is A 0.481 B 0.822 C 0.148 D 0.296

Description : During vibrations any machine has unbalanced force of 392N and if it transmitted force of magnitude 58.3N then transmissibility value is A 0.481 B 0.822 C 0.148 D 0.296

Last Answer : C 0.148

A weight of 50 N is suspended from a spring of stiffness 4000N/m and subjected to a harmonic force of magnitude 60N and frequency 60 Hz. what will be the static displacement of the spring due to maximum applied force A. 0.015m B. 0.15 m C. 15 m D. 150m

Description : A weight of 50 N is suspended from a spring of stiffness 4000N/m and subjected to a harmonic force of magnitude 60N and frequency 60 Hz. what will be the static displacement of the spring due to maximum applied force A. 0.015m B. 0.15 m C. 15 m D. 150m

Last Answer : B. 0.15 m

Which of the following systems produce a vibration in the foundation? (A) Coupled machine(B) Uncoupled machine (C) Balanced machine (D) Unbalanced machine

Description : Which of the following systems produce a vibration in the foundation? (A) Coupled machine(B) Uncoupled machine (C) Balanced machine (D) Unbalanced machine

Last Answer : (D) Unbalanced machine

Which of the following systems produce a vibration in the foundation? (A) Coupled machine (B) Uncoupled machine (C) Balanced machine (D) Unbalanced machine

Description : Which of the following systems produce a vibration in the foundation? (A) Coupled machine (B) Uncoupled machine (C) Balanced machine (D) Unbalanced machine

Last Answer : (D) Unbalanced machine

Which of the following systems produce a vibration in the foundation? a) Unbalanced machine b) Balanced machine c) Coupled machine d) Uncoupled machine

Description : Which of the following systems produce a vibration in the foundation? a) Unbalanced machine b) Balanced machine c) Coupled machine d) Uncoupled machine

Last Answer : a) Unbalanced machine

f the spring displacement is high then the frequency of the spring increases. a) True b) False

Description : f the spring displacement is high then the frequency of the spring increases. a) True b) False

Last Answer : b) False

The transmissibility can be defined as A. Ratio of acting force to the transmitted force B. Ratio of transmitted force to acting force C. Both D. None

Description : The transmissibility can be defined as A. Ratio of acting force to the transmitted force B. Ratio of transmitted force to acting force C. Both D. None

Last Answer : B. Ratio of transmitted force to acting force

Maximum displacement due to forced vibration is dependent on deflection due to static force. a) True b) False

Description : Maximum displacement due to forced vibration is dependent on deflection due to static force. a) True b) False

Last Answer : a) True

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

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

In a spring-mass system, which of the following force is not considered? A Spring force B Damping force C Accelerating force D A and B

Description : In a spring-mass system, which of the following force is not considered? A Spring force B Damping force C Accelerating force D A and B

Last Answer : B Damping force

The angle between spring force and damping force is A 180 0 B 120 0 C 90 0 D 0 0

Description : The angle between spring force and damping force is A 180 0 B 120 0 C 90 0 D 0 0

Last Answer : C 90 0

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

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

In a spring-mass system, which of the following force is not considered? B ( A ) Spring force ( B ) Damping force ( C ) Accelerating force ( D ) A and B

Description : In a spring-mass system, which of the following force is not considered? B ( A ) Spring force ( B ) Damping force ( C ) Accelerating force ( D ) A and B

Last Answer : B ) Damping force

The angle between spring force and damping force is A. 180 0 B. 90 0 C. 0 0 D. None of the above

Description : The angle between spring force and damping force is A. 180 0 B. 90 0 C. 0 0 D. None of the above

Last Answer : B. 90 0

The equation of motion for spring mass system includes A. Inertia Force B. Spring Force C. Both D. Gravitational force

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

Which of the following relations is true when springs are connected in parallel? where K = spring stiffnessa. K e = K 1 + K 2 b. (1 / K e ) = (1/K 1 ) + (1/ K 2 ) c. K e = (1/K 1 ) + (1/ K 2 ) d. None of the above

Description : Which of the following relations is true when springs are connected in parallel? where K = spring stiffnessa. K e = K 1 + K 2 b. (1 / K e ) = (1/K 1 ) + (1/ K 2 ) c. K e = (1/K 1 ) + (1/ K 2 ) d. None of the above

Last Answer : a. K e = K 1 + K 2

Which of the following relations is true when springs are connected parallelly? where K = spring stiffness a.Ke= K1 +K2 b. (1/Ke)=(1/K1)+(1/K2) c.Ke= (1/K1)+(1/K2) d.None of the above

Description : Which of the following relations is true when springs are connected parallelly? where K = spring stiffness a.Ke= K1 +K2 b. (1/Ke)=(1/K1)+(1/K2) c.Ke= (1/K1)+(1/K2) d.None of the above

Last Answer : a.Ke= K1 +K2

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

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.

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 : 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

Harmonic motion is A) Necessarily a periodic motion B) An aperiodic motion C) A motion described in a circle D) A random motion

Description : Harmonic motion is A) Necessarily a periodic motion B) An aperiodic motion C) A motion described in a circle D) A random motion

Last Answer : A) Necessarily a periodic motion

Time required to complete one cycle is known as A. Idle time B. Periodic time C. Both D. None

Description : Time required to complete one cycle is known as A. Idle time B. Periodic time C. Both D. None

Last Answer : B. Periodic time

The resultant motion of two Simple Harmonic Motions will be A. Simple Harmonic MotionB. Periodic Motion C. Projectile Motion D. Zero

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

If motion repeats itself after interval of time, it is called as _________ A. Periodic B. Aperiodic C. Repeating D. None of the above

Description : If motion repeats itself after interval of time, it is called as _________ A. Periodic B. Aperiodic C. Repeating D. None of the above

Last Answer : A. Periodic

When two masses vibrate at the same frequency and in phase, it is called a principal mode of vibration A. True B. False C. Does not depend on vibration D. None of the above

Description : When two masses vibrate at the same frequency and in phase, it is called a principal mode of vibration A. True B. False C. Does not depend on vibration D. None of the above

Last Answer : A. True

SHM is the motion in which acceleration of the body is proportional to its displacement and directed towards the mean position. A. True B. False C. Neither True Nor False D. None

Description : SHM is the motion in which acceleration of the body is proportional to its displacement and directed towards the mean position. A. True B. False C. Neither True Nor False D. None

Last Answer : A. True

f radius of gyration increases then the torsional free vibration increases. a) True b) False

Description : f radius of gyration increases then the torsional free vibration increases. a) True b) False

Last Answer : b) False

Free torsional vibrations of a single motor system increases with increase in polar moment of inertia. a) True b) False

Description : Free torsional vibrations of a single motor system increases with increase in polar moment of inertia. a) True b) False

Last Answer : b) False

Free torsional vibrations will occur in a two rotor system only if both rotors have same frequency. a) True b) False

Description : Free torsional vibrations will occur in a two rotor system only if both rotors have same frequency. a) True b) False

Last Answer : a) True

Isolation factor is twice the transmissibility ratio. a) True b) False

Description : Isolation factor is twice the transmissibility ratio. a) True b) False

Last Answer : b) False

If the mass increases, then the frequency of the free vibrations increases. a) True b) False

Description : If the mass increases, then the frequency of the free vibrations increases. a) True b) False

Last Answer : b) False