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Home » GAT Subject » Agriculture » Aptitude Test - 14
1.Hooke’s law is applicable within
A. Elastic limit
B. Plastic limit
C. Fracture point
D. Elastic limit
2.Young’s Modulus of elasticity is
A. Tensile stress / Tensile strain
B. Shear stress / Shear strain
C. Tensile stress / Shear strain
D. Tensile stress / Tensile strain
3.Modulus of rigidity is
A. Tensile stress / Tensile strain
B. Shear stress / Shear strain
C. Tensile stress / Shear strain
D. Tensile stress / Tensile strain
4.Bulk modulus of elasticity is
A. Tensile stress / Tensile strain
B. Shear stress / Shear strain
C. Tensile stress / Shear strain
D. Tensile stress / Tensile strain
5.Factor of safety is
A. Tensile stress / Permissible stress
B. Compressive stress / Ultimate stress
C. Ultimate stress / Permissible stress
D. Tensile stress / Permissible stress
6.Poisson’s ratio is
A. Lateral strain / Longitudinal strain
B. Shear strain / Lateral strain
C. Longitudinal strain / Lateral strain
D. Lateral strain / Longitudinal strain
7.A rod, 120cm long and of diameter 3.0 cm is subjected to an axial pull of 18 kN. The stress in N/mm2 is.
A. 22.57
B. 23.47
C. 24.57
D. 22.57
8.The total extension in a bar, consists of 3 bars of same material, of varying sections is
A. P/E(L1/A1+L2/A2+L3/A3)
B. P/E(L1A1+L2A2+L3A3)
C. PE(L1/A1+L2/A2+L3/A3)
D. P/E(L1/A1+L2/A2+L3/A3)
9.The relationship between Young’s modulus (E), Bulk modulus (K) and Poisson’s ratio (µ) is given by
A. E=2K(1-2µ)
B. E=3K(1-2µ)
C. E=2K(1-2µ)
D. E=2K(1-2µ)
10.The relationship between Young’s modulus (E), Modulus of rigidity (C) and Bulk modulus (K) is given by
A. E=9CK/(C+3K)
B. E=9CK/(2C+3K)
C. E=9CK/(3C+K)
D. E=9CK/(C+3K)
11.The total extension of a taper rod of length ‘L’ and end diameters ‘D1’ and ‘D2’, subjected to a load (P), is given of
A. 4PL/ΠE. D1D2
B. 3PL/ΠE. D1D2
C. 2PL/ΠE. D1D2
D. 4PL/ΠE. D1D2
12.A rod 3 m long is heated from 10°C to 90°C. Find the expansion of rod. Take Young’s modulus = 1.0 x 10^5 MN/m2 and coefficient of thermal expansion = 0.000012 per degree centigrade.
A. 0.168 cm
B. 0.208 cm
C. 0.288 cm
D. 0.168 cm
13.Elongation of a bar of uniform cross section of length ‘L’, due to its own weight ‘W’ is given by
A. 2WL/E
B. WL/E
C. WL/2E
D. 2WL/E
14.Hooke’s law holds good up to____________________?
A. yield point
B. limit of proportionality
C. breaking point
D. yield point
15.Type of stress that causes dilation is known as
A. Hydrostatic stress
B. Deviatoric stress
C. Shear stress
D. Hydrostatic stress
16.The Bulk modulus (K) of a material having Young’s Modulus (E) = 200 GPa and Modulus of Rigidity (G) = 80 GPa is
A. 160 GPa
B. 250 GPa
C. 133.3 GPa
D. 160 GPa
17.The ratio of change of dimension of the body to the original dimension is known as
A. Pressure
B. Force
C. Stress
D. Pressure
18.The shearing stress in a piece of structural steel is 100 MPa. If the elastic modulus is 200 GPa and the Poisson’s ratio is 0.25, then the shearing strain γ would be
A. 800
B. 1.25
C. 0.8 rad
D. 800
19.The ratio of axial deformation to the original length of the body is known as
A. Poisson’s ratio
B. Linear Strain
C. Linear stress
D. Poisson’s ratio
20.The stress induced in a body, when subjected to two equal and opposite forces which are acting tangentially across the section is known as
A. Bending stress
B. Shear stress
C. Tensile stress
D. Bending stress
21.A plane element is subjected to a shearing stresses of 50MPa. The principal stresses existing in this element and the directions of the planes on which they occur would be _____ at ______ respectively
A. 7 MPa at 90°
B. 7 MPa at 45°
C. 50 MPa at 90°
D. 7 MPa at 90°
22.If longitudinal strain is tensile, the lateral strain will be ___
A. not determined
B. zero
C. compressive
D. not determined
23.The ratio of ultimate stress to the permissible stress is called ___
A. Load factor
B. Stress factor
C. Design factor
D. Load factor
24.The ratio of maximum bending stress to maximum shear stress on the cross-section when a shaft is simultaneously subjected to torque T and bending moment M is
A. 2M/T
B. 2T/M
C. M/T
D. 2M/T
25.Complimentary shear stresses are the shear stresses acting on a set of planes which are
A. orthogonal to each other
B. at an angle of 45° to each other
C. having maximum normal stress
D. orthogonal to each other
26.Modulus of elasticity (E) is defined in terms of bulk modulus (K) and Poisson’s ratio (1/m) as
A. 3K [1-(m/2)]
B. 3K [1-(2/m)]
C. 3K [1-(1/m)]
D. 3K [1-(m/2)]
27.Ratio of maximum shear stress to average shear stress is 4/3 in a ___ section.
A. hexagonal
B. circular
C. triangular
D. hexagonal
28.Poisson’s ratio is defined as the ratio of
A. lateral strain to longitudinal strain
B. lateral stress to longitudinal stress
C. longitudinal strain to lateral strain
D. lateral strain to longitudinal strain
29.Maximum shear stress by Mohr’s circle will be equal to
A. Distance between origin and farthest point of circle on X-axis
B. Distance between origin and nearest point of circle on X-axis
C. Its radius
D. Distance between origin and farthest point of circle on X-axis
30.Normal stress on an oblique plane inclined at angle 45° to the axis of a bar of square cross-section of side S when acted upon by a tensile force P is
A. P/4S2
B. P/2S2
C. 2P/S2
D. P/4S2
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