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Monday, May 20, 2013

Voclet EEMC answer

VOCLET 2013 solved paper EEMC
51. ML-3T0 is the dimention of
Ans.: B) Density
52. Kinetic energy is the measure of amount of work done by an object
Ans.: C) Both A) and B)
53. In moving from ground floor to top floor through a building's stair by simple walking and by running in hurry. We do
Ans.: B) Same amount of work expending different amounts of power.
54. A ball of mass 0.1 Kg strikes a wall normally with speed of 30 m/s and rebounds with a speed of 20 m/s . The impulse of the force exerted by the wall on the ball is
Ans.: A) 1 N-S
55. If a force P acts axially along a rod of length 'l' and cross-sectional area 'A', the strain energy per unit volume will be
Ans.: A) P2 l / 2AE
56. The ratio of moment of inertia of a rectangle and that of a tringle, having same base and height with respect to their base would be
Ans.: C) 4:1
57. The center of gravity of a triangle lies at the point of intersection of
Ans.: C) medians
58. The position of C.G. of a solid hemisphere of radius r lies on the central radius at a distance
Ans.: A) 3r/8
59. The center of percussion of a solid cylinder of radius r resting on a horizontal plane will be
Ans.: C) 2r/3
60. The co-efficient of friction depends on
Ans.: B) nature of surface
61. Two particales with masses in the ratio 1:4 are moving with equal kinetic energies. The magnitude of their linear momentums will conform to the ratio
Ans.: A) 1:2
62. The K.E of a body of mass(m) is E. Its momentum is
Ans.: A) √(2mE)
63. If coplanar, concurrent force P,Q,R (as in fig.) are in equilibirum then
(Figure/Picture)
Ans.: B) P/sinα = Q/sinβ = R/sinγ
64. If a number of coplanar forces act at a point, then their resultant is given by
Ans.: C) √((∑V)2 + (∑H)2)
65. A simply supported beam of length 'l' and diameter 'd' carries a point load 'W' at its mid-span. The maximum bending stress produced will be
Ans.: B) Wl/4πd3
66. A concentrated load P acts on a simply supported beam of span l at a distance l/3 from the left support. The bending moment at the point of application of load is given by
Ans.: D) 2Pl/9
67. A simply supported beam carries several concentrated loads. The shear force would be maximum
Ans.: B) at either of the supports
68. The angle of the inclined plane at which a body, placed on the plane, just begins to slide down is called
Ans.: D) Angle of repose
69. M.I. of a solid cone, of mass 'm' and base radius 'r' about its own axis is
Ans.: If you know the answer please write it to me
70. In a simple wheel and axle machine, a load of 25N is raised by an effort of 5N at an efficiency of 80%. If the diameter of wheel is 375mm, what is the diameter of the axle?
Ans.: D) 60 mm
71. When a rectangular bar is subjected to a tensile stress, the volumetric strain is equal to
Ans.: If you know the answer please share with me
72. When a solid cylinder of mass 'M' and radius 'R' rotates about its axis with an angular speed 'ω', then kinetic energy of rotation is
Ans.: D) MRω2/2
73. In an open flat belt drive if T1= tight side tension and T2= slack side tension, then
Ans.: I am unable to find it in your syllsbus.
74. The power transmitted by a belt is maximum when maximum tension in the belt is
Ans.: I am unable to find it in your syllabus
75. M.I. of a tringular section of base 'b' and height 'h' about its base is
Ans.: C) bh3/12
76. Coulomb friction is the friction between
Ans.: A) two dry surfaces
77. When P is the effortv and W is the load linear law of machines is given by the relation
Ans.: D) P=mW-C
78. When a bar of length 'l', diameter 'd' and specific weight 'w' is rigidly fixed at the upper end and hanging freely, then total elongation of the bar due to self-weight is
Ans.: B) wl2/2E
79. A steel bar of 5 mm diameter is heated from 15°C to 40°C and it is free to expand. The bar will induce
Ans.: A) no stress
80. When a rectangular bar of length 'l', breadth 'b' and thickness 't' is subjected to an axial pull of P, then linear strain is given by
Ans. : Unable to solve
81. To express force, we must know
Ans.: D) all of the above
82. If the arm of a couple is 'doubled', its moment will be
Ans.: C) doubled
83. A car covers first half of a certain distance with a speed V1 and the second half with a speed V2. The average speed during the whole journey is
Ans.: C) 2V1V2 / (V1 + V2 )
84. In the given velocity -time graph, the distance traveled by the body is
Ans.: A) 200 m
85. A ball is projected at an angle of 45° to the horizontal. If the horizontal range is 40 m, the maximum height attained by the ball is
Ans.:
86. Velocity ratio of a simple machine is the ratio between
Ans.: C) velocity of effort and veocity of load
87. The dimension of Modulus of Elasticity is
Ans.: A) ML-1T-2
88. Which of the folowing quantities is a vector?
Ans.: D) Force
89. Which of the following terms is not a vector quantity ?
Ans.: A) Energy
90. The resultant of two forces P and Q is at right angle to P. The angle between the forces is
Ans.: B) cos-1(-P/Q)
91. The resultant of two forces of magnitudes 5N and 10N can not be
Ans.: B) 6N
92. The scalar (dot) product of two vectors is 2√3 and the magnitude of their vector (cross) product is 2. The angle between the vectors is
Ans.: A) 30°
93. If the friction angle is λ, the maximum effciency of a screw jack is
Ans.:D) tan λ / (1 + tanλ)
94. When temptarure difference =t; co-efficient of linear expansion'=α; the themal stress of a rod of length 'l' and young's modulus 'E' is given by
Ans.: C) Eαt
95. A simply supported beam of length 8m carries a point loadof 4KN at a distance 5m from the left hand end. The maximum BM willl be
Ans.: D) 7.5 KN-M
96. The relation between Young's Modulus (E) and Bulk Modulus (K) is given by
Ans.: (:()
97. When two springs having stiffness K1 and K2 are connected in series, the resultant stiffness is
Ans.: C) K1 K2/(K1+K2)
98. A body of mass 4 Kg initially at rest is acted upon simultaneously by two forces one of 8 N and the other 6N acting at right angle to each other . The K.E. of the body after 10s is
Ans.: B) 1250 J
99. The efficiency of a lifting m/c is 45%. The velocity ratio= 20. The effort of 100N will be able to lift a load of
Ans.: A) 900 N
100. When a body tends to slid, the relation between angle of repose α and friction angle λ is given by
Ans.: A) α=λ
Download full Voclet 2013 Paper in PDF
© Engg. Suman Biswas B.Tech (I.T)

2 comments:

raj bishwas said...

q no 85 ans 12

Unknown said...

jexpo te 71 r voclet e 72 num ber pele koto koto rank hote pare ? plz ...taratari ans ta dao.