Search
.Management Sciences
Category: Strength of Materials
A material capable of absorbing large amount of energy before fracture is known as________________?
A. ductility
B. toughness
C. resilience
D. shock proof
E. plasticity
The effort required to lift a load W on a screw jack with helix angle a and angle of friction <j) is equal to__________________?
A. Wtan(a + )
B. Wtan(a-)
C. Wcos(a + )
D. Wsin(a + )
E. W (sin a + cos ).
In a tensile test on mild steel specimen, the breaking stress as compared to ultimate tensile stress is_________________?
A. more
B. less
C. same
D. more/less depending on composition
E. may have any value
In riveted boiler joints, all stresses, shearing, bearing and tensile are based on the_________________?
A. size of rivet
B. size of the drilled or reamed hole
C. average of size of rivet and hole
D. smaller of the two
E. any one of the above
The necessary condition for forces to be in equilibrium is that these should be_____________________?
A. coplanar
B. meet at one point ;
C. both A. and B. above
D. all be equal
E. something else
The co-efficient of friction depends upon _________________?
A. nature of surfaces
B. area of contact
C. shape of the surfaces
D. ail of the above.
E. A. and B. above
If a part is constrained to move and heated, it will develop ____________________?
A. principal stress
B. tensile stress
C. compressive stress
D. shear stress
E. no stress
The value of modulus of elasticity for mild steel is of the order of________________?
A. 2.1xl05 kg/cm2
B. 2.1 X 106 kg/cm2
C. 2.1 x 107 kg/cm2
D. 0.1 xlO6 kg/cm2 (<?) 3.8 x 106 kg/cm2
In the lever of third order, load W, effort P and fulcrum F are oriented as follows_________________?
A. W between P and F
B. F between W and P
C. P between W and F
D. W, P and F all on one side
E. none of the above
If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either___________________?
A. meet in a point
B. be all parallel
C. at least two of them must meet
D. all the above are correct
E. none of the above
Recent Comments