11. Two bars of different materials are of the same size and are subjected to same tensile forces. If the bars have unit elongations in the ratio of 4 : 7, then the ratio of moduli of elasticity of the two materials is ____.
a) 7:4
b) 4:7
c) 4:17
d) 16 :49
Ans: a
12. A prismatic bar of volume V is subjected to a tensile force in longitudinal direction.
If Poisson's ratio of the material is u and longitudinal strain is e, then the final volume of the bar becomes
a) (l + e)(l-u)2V
b) (l-e)2(l + ue)V
c) (l + e)(l-ne)2V
d) (l-ue)3V
Ans: c
13. If a composite bar of steel and copper is heated, then the copper bar will be under
a) tension
b) compression
c) shear
d) torsion
Ans: b
14. Effective length of a weld is equal to
a) overall length - weld size
b) overall length - throat thickness
c) overall length - 2 x weld size
d) overall length - 2 x throat thickness
Ans: c
15. Size of a right angled fillet weld is given by
a) 0.707 x throat thickness
b) 0.414 x throat thickness
c) 2.0 x throat thickness
d) throat thickness
Ans: b
16. The effective length of a fillet weld designed to transmit axial load shall not be less than
a) 2 x size of weld
b) 4 x size of weld
c) 6 x size of weld
d) 10 x size of weld
Ans: b
17. Size of fillet weld with unequal legs is equal to
a) smaller leg length
b) longer leg length
c) throat thickness
d) average of smaller and longer leg lengths
Ans: a
18. Weakest section in a fillet weld is
a) throat of the fillet
b) smaller side
c) side parallel to force
d) side perpendicular to force
Ans: a
19. Effective throat thickness of a fillet weld is
a) 0.707 x size of weld
b) 1.414 x size of weld
c) a function of the angle between fusion faces
d) equal to the side of the fillet
Ans: c
20. According to Unwin's formula, the dia¬meter of rivet in mm to suit the t mm thickness of plate is given by
a) 6t
b) 6Vt
c) 1.9-y/t
d) 1.5 t+ 4
Ans: b
a) 7:4
b) 4:7
c) 4:17
d) 16 :49
Ans: a
12. A prismatic bar of volume V is subjected to a tensile force in longitudinal direction.
If Poisson's ratio of the material is u and longitudinal strain is e, then the final volume of the bar becomes
a) (l + e)(l-u)2V
b) (l-e)2(l + ue)V
c) (l + e)(l-ne)2V
d) (l-ue)3V
Ans: c
13. If a composite bar of steel and copper is heated, then the copper bar will be under
a) tension
b) compression
c) shear
d) torsion
Ans: b
14. Effective length of a weld is equal to
a) overall length - weld size
b) overall length - throat thickness
c) overall length - 2 x weld size
d) overall length - 2 x throat thickness
Ans: c
15. Size of a right angled fillet weld is given by
a) 0.707 x throat thickness
b) 0.414 x throat thickness
c) 2.0 x throat thickness
d) throat thickness
Ans: b
16. The effective length of a fillet weld designed to transmit axial load shall not be less than
a) 2 x size of weld
b) 4 x size of weld
c) 6 x size of weld
d) 10 x size of weld
Ans: b
17. Size of fillet weld with unequal legs is equal to
a) smaller leg length
b) longer leg length
c) throat thickness
d) average of smaller and longer leg lengths
Ans: a
18. Weakest section in a fillet weld is
a) throat of the fillet
b) smaller side
c) side parallel to force
d) side perpendicular to force
Ans: a
19. Effective throat thickness of a fillet weld is
a) 0.707 x size of weld
b) 1.414 x size of weld
c) a function of the angle between fusion faces
d) equal to the side of the fillet
Ans: c
20. According to Unwin's formula, the dia¬meter of rivet in mm to suit the t mm thickness of plate is given by
a) 6t
b) 6Vt
c) 1.9-y/t
d) 1.5 t+ 4
Ans: b
No comments:
Post a Comment