The factor which affects the critical speed of a shaft is a) diameter of the disc b) span of the shaft c) eccentricity d) all of the mentioned

The factor which affects the critical speed of a shaft is
a) diameter of the disc
b) span of the shaft
c) eccentricity
d) all of the mentioned
by

1 Answer

Answer :

d) all of the mentioned
by

Related questions

The factor which affects the critical speed of a shaft is a) diameter of the disc b) span of the shaft c) eccentricity d) all of the mentioned

Description : The factor which affects the critical speed of a shaft is a) diameter of the disc b) span of the shaft c) eccentricity d) all of the mentioned

Last Answer : d) all of the mentioned

The factor which affects critical speed shaft is....... A. eccentricity B. span of shaft C. diameter of disc D. all of above

Description : The factor which affects critical speed shaft is....... A. eccentricity B. span of shaft C. diameter of disc D. all of above

Last Answer : D. all of above

The factors which affects the critical speed of the shaft is A. Eccentricity B. Diameter of the Disc C. Span of the shaft D. All the above

Description : The factors which affects the critical speed of the shaft is A. Eccentricity B. Diameter of the Disc C. Span of the shaft D. All the above

Last Answer : D. All the above

The critical speed of a shaft is affected by A. Diameter of the disc B. Eccentricity C. Span of shaft D. All of above

Description : The critical speed of a shaft is affected by A. Diameter of the disc B. Eccentricity C. Span of shaft D. All of above

Last Answer : D. All of above

The critical speed of a shaft depends upon its A. Mass B. Stiffness C. Mass and stiffnessD. Stiffness and eccentricity

Description : The critical speed of a shaft depends upon its A. Mass B. Stiffness C. Mass and stiffnessD. Stiffness and eccentricity

Last Answer : C. Mass and stiffness

In measuring critical speed of shaft experiment, it was found that the frequency ratio is 0.707 when the eccentricity is 0.05 m. what will be the displacement of the system. A. 0.05 m B. 0.005 m C. 0.5 m D. Infinite

Description : In measuring critical speed of shaft experiment, it was found that the frequency ratio is 0.707 when the eccentricity is 0.05 m. what will be the displacement of the system. A. 0.05 m B. 0.005 m C. 0.5 m D. Infinite

Last Answer : A. 0.05 m

The critical speed of a shaft with a disc supported in between is equal to the natural frequency of the system in A Transverse vibrations B Torsional vibrations C Longitudinal vibrations D None of the mentioned

Description : The critical speed of a shaft with a disc supported in between is equal to the natural frequency of the system in A Transverse vibrations B Torsional vibrations C Longitudinal vibrations D None of the mentioned

Last Answer : A Transverse vibrations

The critical speed of a shaft with a disc supported in between is equal to the natural frequency of the system in a) transverse vibrations b) torsional vibrations c) longitudinal vibrations d) none of the mentioned

Description : The critical speed of a shaft with a disc supported in between is equal to the natural frequency of the system in a) transverse vibrations b) torsional vibrations c) longitudinal vibrations d) none of the mentioned

Last Answer : a) transverse vibrations

The critical speed of a shaft with a disc supported in between is equal to the natural frequency of the system in a) transverse vibrations b) torsional vibrations c) longitudinal vibrations d) none of the mentioned

Description : The critical speed of a shaft with a disc supported in between is equal to the natural frequency of the system in a) transverse vibrations b) torsional vibrations c) longitudinal vibrations d) none of the mentioned

Last Answer : a) transverse vibrations

If the static deflection is 1.665×10 -3 m, calculate the critical speed of the shaft in rps. Centre of disc at 0.25m away from centre of axis of shaft. A. 8.64 B. 9.64 C. 10.64 D. 12.2

Description : If the static deflection is 1.665×10 -3 m, calculate the critical speed of the shaft in rps. Centre of disc at 0.25m away from centre of axis of shaft. A. 8.64 B. 9.64 C. 10.64 D. 12.2

Last Answer : D. 12.2

Critical speed of shaft having a rotating disc in the middle is A) x/e = 1 / ( r^2 - 1 ) B) x/e = 1 / ( r^2 + 1 ) C) x/e = 1 / ( r^2 - 1^2 ) D) x/e = ( 1 + r) / ( r^2 – 1 )

Description : Critical speed of shaft having a rotating disc in the middle is A) x/e = 1 / ( r^2 - 1 ) B) x/e = 1 / ( r^2 + 1 ) C) x/e = 1 / ( r^2 - 1^2 ) D) x/e = ( 1 + r) / ( r^2 – 1 )

Last Answer : A) x/e = 1 / ( r^2 - 1 )

Critical speed of shaft and disc system A) Is equal to natural frequency of the system in transverse vibration B) Is equal to natural frequency of the system in torsional vibration C) Is equal to natural frequency of the system in longitudinal vibration D) Bears no relationship to any of the system natural frequency

Description : Critical speed of shaft and disc system A) Is equal to natural frequency of the system in transverse vibration B) Is equal to natural frequency of the system in torsional vibration C) Is ... of the system in longitudinal vibration D) Bears no relationship to any of the system natural frequency

Last Answer : A) Is equal to natural frequency of the system in transverse vibration

A cantilever shaft having 50 mm diameter and a length of 300mm has a disc of mass 100 kg at its free end. The Young’s modulus for the shaft material is 200 GN/m^2. Determine the static deflection of shaft in mm. A 0.144 B 0.244 C 0.344 D 0.444

Description : A cantilever shaft having 50 mm diameter and a length of 300mm has a disc of mass 100 kg at its free end. The Young’s modulus for the shaft material is 200 GN/m^2. Determine the static deflection of shaft in mm. A 0.144 B 0.244 C 0.344 D 0.444

Last Answer : A 0.144

A cantilever shaft having 50 mm diameter and length of 300 mm has a disc of mass 100 kg at its free enD. The Young’s modulus for the shaft material is 200 GN/m 2 . Calculate the natural longitudinal frequency in Hz. A. 575B. 625 C. 525 D. 550

Description : A cantilever shaft having 50 mm diameter and length of 300 mm has a disc of mass 100 kg at its free enD. The Young’s modulus for the shaft material is 200 GN/m 2 . Calculate the natural longitudinal frequency in Hz. A. 575B. 625 C. 525 D. 550

Last Answer : A. 575

A cantilever shaft having 50 mm diameter and a length of 300 mm has a disc of mass 100 kg at its free end. The Young’s modulus for the shaft material is 200 GN/m 3 . Determine the static deflection of the shaft in mm. a) 0.147 b) 0.213 c) 0.132 d) 0.112

Description : A cantilever shaft having 50 mm diameter and a length of 300 mm has a disc of mass 100 kg at its free end. The Young’s modulus for the shaft material is 200 GN/m 3 . Determine the static deflection of the shaft in mm. a) 0.147 b) 0.213 c) 0.132 d) 0.112

Last Answer : a) 0.147

A cantilever shaft having 50 mm diameter and a length of 300 mm has a disc of mass 100 kg at its free end. The Young’s modulus for the shaft material is 200 GN/m 2 . Determine the frequency of transverse vibrations of the shaft. a) 31 b) 35 c) 37 d) 41

Description : A cantilever shaft having 50 mm diameter and a length of 300 mm has a disc of mass 100 kg at its free end. The Young’s modulus for the shaft material is 200 GN/m 2 . Determine the frequency of transverse vibrations of the shaft. a) 31 b) 35 c) 37 d) 41

Last Answer : d) 41

A cantilever shaft having 50 mm diameter and length of 300 mm has a disc of mass 100 kg at its free end. The Young’s modulus for the shaft material is 200 GN/m 2 . Calculate the natural longitudinal frequency in Hz. a) 575 b) 625 c) 525 d) 550

Description : A cantilever shaft having 50 mm diameter and length of 300 mm has a disc of mass 100 kg at its free end. The Young’s modulus for the shaft material is 200 GN/m 2 . Calculate the natural longitudinal frequency in Hz. a) 575 b) 625 c) 525 d) 550

Last Answer : a) 575

A cantilever shaft has a diameter of 6 cm and the length is 40cm, it has a disc of mass 125 kg at its free end. The Young’s modulus for the shaft material is 250 GN/m2. Calculate the static deflection in nm. a) 0.001 b) 0.083c) 1.022 d) 0.065

Description : A cantilever shaft has a diameter of 6 cm and the length is 40cm, it has a disc of mass 125 kg at its free end. The Young’s modulus for the shaft material is 250 GN/m2. Calculate the static deflection in nm. a) 0.001 b) 0.083c) 1.022 d) 0.065

Last Answer : a) 0.001

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

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

Critical speed is expressed as A rotation of shaft in degrees B rotation of shaft in radians C rotation of shaft in minutes D natural frequency of the shaft

Description : Critical speed is expressed as A rotation of shaft in degrees B rotation of shaft in radians C rotation of shaft in minutes D natural frequency of the shaft

Last Answer : D natural frequency of the shaft

Rotor shaft of a large electric motor supported between short bearings at both ends shows a deflection of 1.8 mm in middle of motor. Assuming rotor to be perfectly balanced and supported at knife edges at both ends, likely critical speed (rpm) of shaft isA 350 B 4430 C 705 D 2810

Description : Rotor shaft of a large electric motor supported between short bearings at both ends shows a deflection of 1.8 mm in middle of motor. Assuming rotor to be perfectly balanced and supported at knife edges at both ends, likely critical speed (rpm) of shaft isA 350 B 4430 C 705 D 2810

Last Answer : C 705

In most practical situation the speed of rotation of the shaft is usually A) Much below the critical speed B) Much above the critical speed C) Near about the critical speed D) Having no relationship with critical speed

Description : In most practical situation the speed of rotation of the shaft is usually A) Much below the critical speed B) Much above the critical speed C) Near about the critical speed D) Having no relationship with critical speed

Last Answer : B) Much above the critical speed

The rotating shaft or rotor vibrates with excessive lateral vibration at angular speed at which occurs is called as A) rotating speed B) critical speed C) vibrating speed D) None of the above

Description : The rotating shaft or rotor vibrates with excessive lateral vibration at angular speed at which occurs is called as A) rotating speed B) critical speed C) vibrating speed D) None of the above

Last Answer : B) critical speed

Critical speed is expressed as a) rotation of shaft in degrees b) rotation of shaft in radians c) rotation of shaft in minutes d) natural frequency of the shaft

Description : Critical speed is expressed as a) rotation of shaft in degrees b) rotation of shaft in radians c) rotation of shaft in minutes d) natural frequency of the shaft

Last Answer : d) natural frequency of the shaft

Critical speed is expressed as ______. A) rotation of the shaft in degrees (B) rotation of the shaft in radians (C) rotation of the shaft in minutes (D) the natural frequency of the shaf

Description : Critical speed is expressed as ______. A) rotation of the shaft in degrees (B) rotation of the shaft in radians (C) rotation of the shaft in minutes (D) the natural frequency of the shaf

Last Answer : (D) the natural frequency of the shaft

Critical speed is expressed as a) rotation of shaft in degrees b) rotation of shaft in radians c) rotation of shaft in minutes d) natural frequency of the shaft

Description : Critical speed is expressed as a) rotation of shaft in degrees b) rotation of shaft in radians c) rotation of shaft in minutes d) natural frequency of the shaft

Last Answer : d) natural frequency of the shaft

When the particles of the shaft or disc move in a circle about the axis of the shaft, then the vibrations are known as ___________ . A Longitudinal vibrations B Transverse vibrations C Torsional vibrations D None of these

Description : When the particles of the shaft or disc move in a circle about the axis of the shaft, then the vibrations are known as ___________ . A Longitudinal vibrations B Transverse vibrations C Torsional vibrations D None of these

Last Answer : C Torsional vibrations

When the particles of the shaft or disc move in a circle about the axis of the shaft, then the vibrations are known as ___________ . A. longitudinal vibrations B. transverse vibrations C. torsional vibrations D. none of these

Description : When the particles of the shaft or disc move in a circle about the axis of the shaft, then the vibrations are known as ___________ . A. longitudinal vibrations B. transverse vibrations C. torsional vibrations D. none of these

Last Answer : C. torsional vibrations

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

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

Rotating shafts tends to vibrate violently in transverse directions at certain speed. This speed is called A Critical speedB Whipping speed C Whirling speed D All of the mentioned

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Last Answer : D All of the mentioned

A shaft of diameter d carries two discs at its two ends. The lowest torsional frequency is ω n . If the diameter is doubled, then the lowest torsional frequency becomes A 4ω n B ω n /2 C ω n /4 D 4ω n

Description : A shaft of diameter d carries two discs at its two ends. The lowest torsional frequency is ω n . If the diameter is doubled, then the lowest torsional frequency becomes A 4ω n B ω n /2 C ω n /4 D 4ω n

Last Answer : D 4ω n

If two discs are attached to one shaft at its both end, then it has_____ number of natural frequencies. A Infinite B One C Two D None of the mentioned

Description : If two discs are attached to one shaft at its both end, then it has_____ number of natural frequencies. A Infinite B One C Two D None of the mentioned

Last Answer : B One

The vibrations perpendicular to the shaft axis are known as A Transverse B Longitudinal C Torsional D None of the mentioned

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The speed at which the shaft runs so that the additional deflection from the axis of rotation of the shaft becomes infinite, is known as _________ * 1 point (A) Whirling speed (B) Rotational speed (C) Stabilizing speed (D) Reciprocating speed

Description : The speed at which the shaft runs so that the additional deflection from the axis of rotation of the shaft becomes infinite, is known as _________ * 1 point (A) Whirling speed (B) Rotational speed (C) Stabilizing speed (D) Reciprocating speed

Last Answer : (A) Whirling speed

The speed at which the shaft runs so that the additional deflection from the axis of rotation of the shaft becomes infinite, is known as _________ A. Whirling speed B. Rotational speed C. Stabilizing speed D. Reciprocating speed

Description : The speed at which the shaft runs so that the additional deflection from the axis of rotation of the shaft becomes infinite, is known as _________ A. Whirling speed B. Rotational speed C. Stabilizing speed D. Reciprocating speed

Last Answer : A. Whirling speed

When the speed of rotation of a shaft equals one of the natural frequencies of the shaft, it is called____________speed.

Description : When the speed of rotation of a shaft equals one of the natural frequencies of the shaft, it is called____________speed.

Last Answer : Ans- Critical

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

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

Ratio of actual damping coefficient to critical damping coefficient is called A. Damping Factor B. Angular Factor C. Critical Factor D. None of above

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

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

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

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

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

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

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

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

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

The speed at which resonance occurs is called A. Normal Speed B. Idle Speed C. Critical Speed D. None

Description : The speed at which resonance occurs is called A. Normal Speed B. Idle Speed C. Critical Speed D. None

Last Answer : C. Critical Speed

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

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

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

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

Dynamic vibration absorber is suitable for A varying speed machines B constant speed machines C Zero speed range machines D None of the mentioned

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

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In Fullarton Tachometer, a thin strip with a ______ is attached at one of its ends. (A) mass (B) spring (C) damper (D) shaft

Description : In Fullarton Tachometer, a thin strip with a ______ is attached at one of its ends. (A) mass (B) spring (C) damper (D) shaft

Last Answer : (A) mass

For a two-rotor system, the length of one shaft (A) is twice the other (B), then what is the relation between the mass moment of inertia of the shafts. A 2I(A) = I(B) B I(A) = 2I(B) C I(A) = I(B) D 2I(A) = 3I(B)

Description : For a two-rotor system, the length of one shaft (A) is twice the other (B), then what is the relation between the mass moment of inertia of the shafts. A 2I(A) = I(B) B I(A) = 2I(B) C I(A) = I(B) D 2I(A) = 3I(B)

Last Answer : A 2I(A) = I(B)

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 rotate in same direction C. Zero node behavior is observed in rotors rotating in opposite direction D. All of the above

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