2801. Efficiency of a riveted joint is the ratio of its strength (max. load it can resist without failure) to the strength of the unpunched plate in_________________?
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A. none of the above

B. any one of the above

C. compression

D. tension

E. bearing

2802. The C.G. of a solid hemisphere lies on the central radius 3r_________________?
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A. at distance from the plane base 3r

B. at distance from the plane base 3r

C. at distance from the plane base

D. at distance from the plane base or

E. at distance from the plane base 3r

2803. The safe twisting moment for a compound shaft is equal to the _________________?
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A. minimum calculated value

B. mean value

C. maximum calculated value

D. none of the above

E. extreme value

2804. True stress-strain curve for materials is plotted between__________________?
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A. load/instantaneous area and instantaneous area/original area

B. load/original cross-sectional area and change in length/original length

C. none of the above

D. load/instantaneous cross-sectional area original area and log

E. load/instantaneous cross-sectional area and change in length/original length

2805. If a part is constrained to move and heated, it will develop ____________________?
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A. principal stress

B. compressive stress

C. tensile stress

D. no stress

E. shear stress

2806. The property of a material which allows it to be drawn into a smaller section is called________________?
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A. drawabihty

B. malleability

C. plasticity

D. ductility

E. elasticity

2807. Which of the following is the locus of a point that moves in such a manner that its distance from a fixed point is equal to its distance from a fixed line multiplied by a constant greater than one_______________?
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A. ellipse

B. hyperbola

C. parabola

D. none of the above

E. circle

2808. The stress necessary to initiate yielding is_________________?
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A. greater than that necessary to stop it

B. considerably lesser than that necessary to continue it

C. equal to that necessary to stop it

D. lesser than that necessary to stop it

E. considerably greater than that necessary to continue it
2809. The co-efficient of friction depends upon _________________?
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A. nature of surfaces

B. ail of the above.

C. A. and B. above

D. area of contact

E. shape of the surfaces

2810. The materials which exhibit the same elastic properties in all directions are called______________?
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A. isentropic

B. homogeneous

C. isotropic

D. inelastic

E. visco-elastic.

2811. If rain is falling in the opposite direction of the movement of a pedestrain, he has to hold his umbrella ________________________?
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A. less inclined when standing

B. more inclined when moving

C. more inclined when standing

D. less inclined when moving

E. none of the above

2812. A particle inside a hollow sphere of radius r, having coefficient of friction -rr can rest upto height of___________________?
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A. r/2

B. r/A

C. r/%

D. 0.134 r

E. 3r/8

2813. A single force and a couple acting in the same plane upon a rigid body_________________?
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A. are equivalent

B. cannot balance each other

C. none of the above

D. balance each other

E. produce moment of a couple

2814. A cylindrical section having no joint is known as ____________________?
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A. jointless section

B. seamless section

C. homogeneous section

D. manufactured section

E. perfect section

2815. The value of Poissons ratio for steel is between_________________?
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A. 3 to 4

B. 0.25 to 0.33

C. 0.01 to 0.1

D. 0.4 to 0.6

E. 0.23 to 0.27

2816. The algebraic sum of moments of the forces forming couple about any point in their plane is__________________?
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A. equal to the moment of the couple

B. constant

C. both of above are correct

D. both of above are wrong

E. none of the above

2817. In a tensile test on mild steel specimen, the breaking stress as compared to ultimate tensile stress is_________________?
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A. same

B. less

C. more/less depending on composition

D. may have any value

E. more

2818. The ratio of lateral strain to the linear strain within elastic limit is known as_______________?
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A. bulk modulus

B. modulus of elasticity

C. modulus of rigidity

D. Youngs modulus

E. Poissons ratio
2819. During a tensile test on a specimen of 1 cm cross-section, maximum load observed was 8 tonnes and area of cross-section at neck was 0.5 cm2. Ultimate tensile strength of specimen is___________________?
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A. none of the above

B. 22 tonnes/cm2

C. 4 tonnes/cm2

D. 8 tonnes/cm2

E. 16 tonnes/cm2

2820. If n = number of members andy = number of joints, then for a perfect frame, n =________________?
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A. 2/ -4

B. 2/-3

C. j-2

D. 3/-2

E. 2j-l

2821. A beam is loaded as cantilever. If the load at the end is increased, the failure will occur ___________________?
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A. anywhere

B. in the middle

C. at the tip below the load

D. none of the above

E. at the support

2822. In a belt drive, the pulley diameter is doubled, the belt tension and pulley width remaining same. The changes required in key will be____________________?
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A. increase key length

B. none of the above

C. increase key width

D. increase key depth

E. double all the dimensions

2823. The C.G. of a plane lamina will not be at its geometrical centre in the case of a __________________?
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A. equilateral triangle

B. circle

C. rectangle

D. square

E. right angled triangle
2824. Flow stress corresponds to___________________?
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A. rupture stress

B. breaking point

C. plastic deformation of solids

D. none of the above

E. fluids in motion

2825. A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to_________________?
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A. 250

B. 500

C. 25

D. 50

E. 100

2826. In the tensile test, the phenomenon of slow extension of the material, i. e. stress increasing with the time at a constant load is called_____________?
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A. breaking

B. plasticity

C. yielding

D. creeping

E. none of the above

2827. Coulomb friction is the friction between_____________________?
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A. two dry surfaces

B. solids and liquids

C. bodies having relative motion

D. two lubricated surfaces

E. electrically charged particles

2828. The impact strength of a material is an index of its ___________________?
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A. toughness

B. hardness

C. fatigue strength

D. tensile strength

E. capability of being cold worked

2829. The internal reaction in bottom 80 cm length will be________________?
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A. same in both cases

B. zero in first case

C. different in both cases

D. data are not sufficient to determine same

E. none of the above

2830. The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of __________________?
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A. friction

B. limiting friction

C. kinematic friction

D. static friction

E. repose
2831. The energy absorbed in a body, when it is strained within the elastic limits, is known as________________?
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A. proof resilience

B. strain energy

C. modulus of resilience

D. resilience

E. toughness

2832. For which material the Poissons ratio is more than unity_________________?
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A. copper

B. cast iron

C. aluminium

D. steel

E. none of the above
2833. The value of Poissons ratio for cast iron is_________________?
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A. 0.1 to 0.2

B. 0.25 to 0.33

C. 0.23 to 0.27

D. 0.4 to 0.6

E. 3 to 4

2834. A riveted joint in which every rivet of a row is opposite to other rivet of the outer row, is known as______________________?
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A. chain riveted joint

B. none of the above

C. criss-cross riveted joint

D. diamond riveted joint

E. zig-zag riveted joint

2835. The force acting along the circumference will cause stress in the walls in a direction normal to the longitudinal axis of cylinder; this stress is called___________________?
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A. yeiled stress

B. none of the above

C. longitudinal stress

D. hoop stress

E. ultimate stress

2836. A body moves, from rest with a constant acceleration of 5 m per sec. The distance covered in 5 sec is most nearly_______________?
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A. 62.5 m

B. 38 m

C. 124 m

D. 96 m

E. 240 m

2837. A material capable of absorbing large amount of energy before fracture is known as________________?
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A. plasticity

B. ductility

C. resilience

D. shock proof

E. toughness
2838. The percentage reduction in area of a cast iron specimen during tensile test would be of the order of_________________?
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A. 1025%

B. 510%

C. 2550%

D. negligible

E. more than 50%

2839. A cable with a uniformly distributed load per horizontal metre run will take the following shape_________________?
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A. straight line

B. elliptical

C. hyperbola

D. part of a circle

E. parabola
2840. A key is subjected to side pressure as well at shearing forces. These pressures are called_________________?
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A. none of the above

B. resultant stresses

C. crushing stresses

D. fatigue stresses

E. bearing stresses
2841. Which of the following is the example of lever of first order__________________?
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A. arm of man

B. all of the above

C. none of the above

D. pair of clinical tongs

E. pair of scissors

2842. When it is indicated that a member is elastic, it means that when force is applied, it will________________?
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A. none of the above

B. be safest

C. stretch

D. not stretch

E. not deform

2843. The value of shear stress which is induced in the shaft due to the applied couple varies____________________?
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A. from maximum at the center to zero at the circumference

B. from zero at the center to maximum at the circumference

C. from maximum at the center to mini-mum at the cricumference

D. from minimum at the centro to maxi-mum at the circumference

E. none of the above

2844. The total strain energy stored in a body is termed as__________________?
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A. resilience

B. modulus of resilience

C. proof resilience

D. toughness

E. impact energy

2845. The stress developed in a material at breaking point in extension is called_________________?
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A. ultimate tensile stress

B. breaking stress

C. proof stress

D. fracture stress

E. yield point stress

2846. The Youngs modulus of a wire is defined as the stress which will increase the length of wire compared to its original length________________?
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A. same amount

B. half

C. one-fourth

D. double

E. four times

2847. For steel, the ultimate strength in shear as compared to in tension is nearly _________________?
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A. one-third

B. same

C. one-fourth

D. half

E. two-third

2848. Hookes law holds good up to____________________?
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A. elastic limit

B. breaking point

C. yield point

D. limit of proportionality

E. plastic limit

2849. Tensile strength of a material is obtained by dividing the maximum load during the test by the_________________?
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A. area at the time of fracture

B. average of A. and B.

C. original cross-sectional area

D. minimum area after fracture

E. none of the above.

2850. It equal and opposite forces applied to a body tend to elongate it, the stress so produced is called______________________?
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A. internal resistanpe

B. tensile stress

C. compressive stress

D. transverse stress

E. working stress