UNIT 4
Phys 2002
Multiple Choice 1 on Equilibrium Questions
Multiple Choice 1 on Equilibrium Answers
Multiple Choice 2 on Equilibrium Questions
Multiple Choice 2 on Equilibrium Answers
Multiple Choice 1 on Mechanical Properties of Solids Questions
Multiple Choice 1 on Mechanical Properties of Solids Answers
Multiple Choice 1 on Fluid Properties Questions
Multiple Choice 1 on Fluid Properties Question Answera

 

 

Multiple Choice 1 on Mechanical Properties of Solids...

Use this answer sheet

1. A perfectly rigid body is one
A.   which does not move on application of force
B.   whose shape and size change on application of force
C.   whose shape and size do not change on application of force
D.   which flows on application of force

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2. In Fig 1.1, the elastic zone is
A. OT
B. OU
C. OW
D. OX

Fig 1.1
 
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3. In Fig 1.2, T is
A.  the limit of proportionality
B.  yield strength
C.  ultimate strength
D.  fracture point

Fig 1.2
 
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4. In Fig 1.3, permanent deformation occurs if the stres is increased beyond
A.  T
B.  U
C.  W
D.  X

Fig 1.3
 
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5. In Fig 1.3, which of the following is NOT true in the region OT
A.  extension is not proportional to the applied force
B.  material is not elastic
C.  material is elastic
D.  the slope gives the Young's modulus

Fig 1.4
 
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6. In Fig 1.5, the yield point is
A.   T
B.   U
C.   W
D.   X

Fig 1.5
 
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7. In Fig 1.5, the tensile stress corresponds to stress at point
A.   T
B.   U
C.   W
D.   X

Fig 1.6
 

8. Young’s modulus Y is the ratio of
A.  tensile (or compressive) stress to the longitudinal strain
B.  shear stress to the longitudinal strain
C.   longitudinal strain to the tensile (or compressive) stress
D.  shear strain to the longitudinal stress

9. Shear modulus or modulus of rigidity is the ratio of 
A.  shearing stress to shearing strain
B.  shearing stress to lateral strain
C.  shearing strain to shearing stress
D.  longitudinal stress to shearing strain

10. Bulk modulus is the ratio of 
A.   the ratio of longitudinal stress to hydraulic strain
B.   the ratio of hydraulic stress to hydraulic strain
C.   the ratio of hydraulic strain to hydraulic stress
D.   the ratio of lateral stress to hydraulic strain

11. Under normal conditions columns which support buildings experience
A.   shear stress
B.   compressive stress
C.   hydraulic stress
D.   tensile stress

12. Under normal conditions cantilevers outside buildings experience
A.   shear stress
B.   compressive stress
C.   hydraulic stress
D.   tensile stress

 
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13. Bolts securing beams to columns in steel buildings experience
A.   shear stress
B.   compressive stress
C.   hydraulic stress
D.   tensile stress

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14. Cross-section of steel beams are usually shaped like an I or H rather than a rectangle because
A.  the strength to weight ratio of the beam is increased
B.  the strength to weight ratio of the beam is decreased
C.   stresses are not uniform in a rectangular sections
D.   they have convient wings for attaching bolts

15. A ductile material
A.   has a large plastic deformation region
B.   fractures at low stress
C.   breaks soon after the yield point is reached
D.   has a large elastic region

16. A brittle material
A.   has a large plastic deformation region
B.   fractures at low stress
C.   breaks soon after the yield point is reached
D.   has a large elastic region

17. If a material is subjected to two incremental true strains namely ε1 and ε2, then the total true strain is
A.   ε1 X ε2
B.   ε1 - ε2
C.   ε1 + ε2
D.   ε1 / ε2

18. High elastic modulus in materials arises from
A.  strong bonds
B.  weak bonds
C.  does not depend on bonds
D.  averaage bonds

19. Materials that show very small plastic range beyond elastic limit are called
A.   brittle materials
B.   elastomers
C.   elastic materials
D.   ductile materials

20. The stress which causes a body to increase its dimensions is
A.   sheer
B.   hydraulic
C.   compressive
D.   tensile

21. Steel has a greater modulus of elasticity that rubber because under the same stress
A.   the strain in steel is less than rubber
B.   the strain in steel is more than rubber
C.   elongation in steel is more than in rubber
D.   none of the above

22. A solid metal cylinder can be subjected to
A.  compressive stress
B.  tensile stress
C.  shearing stress
D.  all the above

23. Yield point may be defined as the point where
A.   working stress ends and breaking stress begins
B.   breaking stress ends and working stress begins
C.   elastic behavior ends and plastic behavior begins
D.   plastic behavior ends and elastic behavior begins

24. Dimensional formula of stress is same as that of
A.  pressure
B.  impulse
C.  strain
D.  force

25. The final point on the stress strain graph is called
A.  fracture point
B.  yield point
C.  elastic limit
D.  proportional limit

26. If we compress or elongate the solids, their potential energy?
A.  decrease whether compressed or elongated
B.  increase if elongated
C.  increase whether compressed or elongated
D.  increase if compressed

27. Springs deform permanently after prolonged use, because of
A.  rigidity
B.  elastic fatigue
C.  plastic fatigue
D.  Hooke's Law

28. The modulus of elasticity ________________ temperature increase.
A.  decreases with
B.  increases with
C.  does not depend on
D.  may increase or decrease with

29. The constant of proportionality in Hooke’s law is
A.  modulus of elasticity
B.  strain
C.  restoring force
D.  stress

30. Find the ratio of stress produced in two wires of same length and material but with radii in the ratio 2 : 1 when both are under same force.
A.  1 : 2
B.  2 : 1
C.  4 : 1
D.  1 : 4

   
     
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Concept by Kishore Lal. Programmed by Kishore Lal... Copyright © 2015 Kishore Lal. All rights reserved.