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Code No: 05412101 Set No. 1JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
IV B.Tech I-Sem I Mid-Term Examinations, Aug/Sept. 2009THEORY OF VIBRATIONS AND AEROELASTICITY
Objective ExamName: ______________________________ Hall Ticket No.
Answer All Questions. All Questions Carry Equal Marks.Time: 20 Min. Marks: 20.A
I. Choose the correct alternative:
1. In free vibrations, the acceleration vector leads the displacement vector by [ ]
a) b) /2 c) /3 d) 2/3
2. If the system vibrates normal to its axis the vibrations are [ ]
a) Longitudinal b) Torsional c) Transverse d) None
3. The vibration of beams is [ ]
a) Longitudinal b) Torsional c) Transverse d) None
4. The number of DOF of a beam vibration is [ ]
a) Single DOF b) Finite DOF c) Infinite DOF d) None
5. The Equivalent Stiffness of axial bar of length L , cross-sectional area A and Youngs
modulus E is [ ]
a) AL/E b) AE/L c) EL/A d) None6. If two springs are connected in parallel, the resultant stiffness will [ ]
a)Increase b) Decrease c) be Unaltered d) None
7. If two springs of equal stiffness are connected in series then the equivalent stiffness
[ ]
a) Is Same b) Doubles c) Becomes half d)None
8. For a spring of mass m, the equivalent mass at the end of the spring when vibrating is
[ ]
a) m/2 b) m/3 c) m/4 d) m
9. If the stiffness of the system is increased to 4 times of original value, then the frequency
becomes [ ]
a) Half b) Double c) 4times d) Unaltered
10. In a Vibration, kinetic energy at mean position is equal to the potential energy at extreme
position. This method is called [ ]
a) Newtons method b) Lagranges method c) Rayleighs method d) None
Contd2
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Code No: 05412101 : 2 : Set No. 1
II. Fill in the blanks:
11. A reduction in amplitude of successive oscillations without external disturbance indicates
____________________
12. The equivalent stiffness of cantilever beam is ________________
13. The unit of stiffness is ________________
14. The natural frequency of spring mass system is _______________
15. The maximum displacement of a vibrating system is called ____________
16. The vibration of a system under external force is called _________________ vibration
17. The elastic coupling is also known as __________________coupling
18. Damping coupling is also known as ____________________ Coupling
19. The natural frequency of a beam subjected to several point loads is given by an empirical
formula obtained by _________ method.
20. The lowest frequency of Multiple DOF is called ________________
-oOo-
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Code No: 05412101 Set No. 2JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
IV B.Tech I-Sem I Mid-Term Examinations, Aug/Sept. 2009THEORY OF VIBRATIONS AND AEROELASTICITY
Objective Exam
Name: ______________________________ Hall Ticket No.
Answer All Questions. All Questions Carry Equal Marks.Time: 20 Min. Marks: 20.A
I. Choose the correct alternative:
1. The number of DOF of a beam vibration is [ ]
a) Single DOF b) Finite DOF c) Infinite DOF d) None
2. The Equivalent Stiffness of axial bar of length L , cross-sectional area A and Youngs
modulus E is [ ]
a) AL/E b) AE/L c) EL/A d) None
3. If two springs are connected in parallel, the resultant stiffness will [ ]
a)Increase b) Decrease c) be Unaltered d) None
4. If two springs of equal stiffness are connected in series then the equivalent stiffness
[ ]
a) Is Same b) Doubles c) Becomes half d)None
5. For a spring of mass m, the equivalent mass at the end of the spring when vibrating is
[ ]a) m/2 b) m/3 c) m/4 d) m
6. If the stiffness of the system is increased to 4 times of original value, then the frequency
becomes [ ]
a) Half b) Double c) 4times d) Unaltered
7. In a Vibration, kinetic energy at mean position is equal to the potential energy at extreme
position. This method is called [ ]
a) Newtons method b) Lagranges method c) Rayleighs method d) None8. In free vibrations, the acceleration vector leads the displacement vector by [ ] a) b) /2 c) /3 d) 2/3
9. If the system vibrates normal to its axis the vibrations are [ ]
a) Longitudinal b) Torsional c) Transverse d) None
10. The vibration of beams is [ ]
a) Longitudinal b) Torsional c) Transverse d) None
Contd.2
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Code No: 05412101 :2: Set No. 2
II. Fill in the blanks:
11. The natural frequency of spring mass system is _______________
12. The maximum displacement of a vibrating system is called ____________
13. The vibration of a system under external force is called _________________ vibration
14. The elastic coupling is also known as __________________coupling
15. Damping coupling is also known as ____________________ Coupling
16. The natural frequency of a beam subjected to several point loads is given by an empirical
formula obtained by _________ method.
17. The lowest frequency of Multiple DOF is called ________________
18. A reduction in amplitude of successive oscillations without external disturbance indicates
____________________
19. The equivalent stiffness of cantilever beam is ________________
20. The unit of stiffness is ________________
-oOo-
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Code No: 05412101 Set No. 3JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
IV B.Tech I-Sem I Mid-Term Examinations, Aug/Sept. 2009THEORY OF VIBRATIONS AND AEROELASTICITY
Objective Exam
Name: ______________________________ Hall Ticket No.
Answer All Questions. All Questions Carry Equal Marks.Time: 20 Min. Marks: 20.A
I Choose the correct alternative:
1. If two springs are connected in parallel, the resultant stiffness will [ ]
a)Increase b) Decrease c) be Unaltered d) None
2. If two springs of equal stiffness are connected in series then the equivalent stiffness
[ ]
a) Is Same b) Doubles c) Becomes half d)None
3. For a spring of mass m, the equivalent mass at the end of the spring when vibrating is
[ ]
a) m/2 b) m/3 c) m/4 d) m
4. If the stiffness of the system is increased to 4 times of original value, then the frequency
becomes [ ]
a) Half b) Double c) 4times d) Unaltered
5. In a Vibration, kinetic energy at mean position is equal to the potential energy at extreme
position. This method is called [ ]a) Newtons method b) Lagranges method c) Rayleighs method d) None
6. In free vibrations, the acceleration vector leads the displacement vector by [ ]
a) b) /2 c) /3 d) 2/3
7. If the system vibrates normal to its axis the vibrations are [ ]
a) Longitudinal b) Torsional c) Transverse d) None
8. The vibration of beams is [ ]
a) Longitudinal b) Torsional c) Transverse d) None
9. The number of DOF of a beam vibration is [ ]
a) Single DOF b) Finite DOF c) Infinite DOF d) None
10. The Equivalent Stiffness of axial bar of length L , cross-sectional area A and Youngs
modulus E is [ ]
a) AL/E b) AE/L c) EL/A d) NoneContd2
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Code No: 05412101 :2: Set No. 3
II. Fill in the blanks:
11. The vibration of a system under external force is called _________________ vibration
12. The elastic coupling is also known as __________________coupling
13. Damping coupling is also known as ____________________ Coupling
14. The natural frequency of a beam subjected to several point loads is given by an empirical
formula obtained by _________ method.
15. The lowest frequency of Multiple DOF is called ________________
16. A reduction in amplitude of successive oscillations without external disturbance indicates____________________
17. The equivalent stiffness of cantilever beam is ________________
18. The unit of stiffness is ________________
19. The natural frequency of spring mass system is _______________
20. The maximum displacement of a vibrating system is called ____________
-oOo-
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Code No: 05412101 Set No. 4JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
IV B.Tech I-Sem I Mid-Term Examinations, Aug/Sept. 2009THEORY OF VIBRATIONS AND AEROELASTICITY
Objective Exam
Name: ______________________________ Hall Ticket No.
Answer All Questions. All Questions Carry Equal Marks.Time: 20 Min. Marks: 20.A
I. Choose the correct alternative:
1. For a spring of mass m, the equivalent mass at the end of the spring when vibrating is
[ ]
a) m/2 b) m/3 c) m/4 d) m
2. If the stiffness of the system is increased to 4 times of original value, then the frequency
becomes [ ]a) Half b) Double c) 4times d) Unaltered
3. In a Vibration, kinetic energy at mean position is equal to the potential energy at extreme
position. This method is called [ ]
a) Newtons method b) Lagranges method c) Rayleighs method d) None4. In free vibrations, the acceleration vector leads the displacement vector by [ ]
a) b) /2 c) /3 d) 2/3
5. If the system vibrates normal to its axis the vibrations are [ ]
a) Longitudinal b) Torsional c) Transverse d) None
6. The vibration of beams is [ ]
a) Longitudinal b) Torsional c) Transverse d) None
7. The number of DOF of a beam vibration is [ ]
a) Single DOF b) Finite DOF c) Infinite DOF d) None
8. The Equivalent Stiffness of axial bar of length L , cross-sectional area A and Youngs
modulus E is [ ]
a) AL/E b) AE/L c) EL/A d) None9. If two springs are connected in parallel, the resultant stiffness will [ ]
a) Increase b) Decrease c) be Unaltered d) None
10. If two springs of equal stiffness are connected in series then the equivalent stiffness
[ ]
a) Is Same b) Doubles c) Becomes half d)None
Contd...2
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Code No: 05412101 :2: Set No. 4
II. Fill in the blanks:
11. Damping coupling is also known as ____________________ Coupling
12. The natural frequency of a beam subjected to several point loads is given by an empirical
formula obtained by _________ method.
13. The lowest frequency of Multiple DOF is called ________________
14. A reduction in amplitude of successive oscillations without external disturbance indicates
____________________
15. The equivalent stiffness of cantilever beam is ________________
16. The unit of stiffness is ________________
17. The natural frequency of spring mass system is _______________
18. The maximum displacement of a vibrating system is called ____________
19. The vibration of a system under external force is called _________________ vibration
20. The elastic coupling is also known as __________________coupling
-o0o-
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