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Engineering Mechanics

Engineering Mechanics
The centre of gravity a T-section 100 mm × 150 mm × 50 mm from its bottom is

75 mm
50 mm
87.5 mm
125 mm

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Engineering Mechanics
The range of a projectile is maximum, when the angle of projection is

60°
30°
90°
45°

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Engineering Mechanics
The velocity ratio of a differential pulley block with D and d as the diameters of larger and smaller pulley, is

D/(D - d)
D/(D + d)
2D/(D - d)
2D/(D + d)

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Engineering Mechanics
The maximum efficiency of a lifting machine is

1/m
1/(m × V.R.)
V.R./m
m/V.R.

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Engineering Mechanics
Efficiency of a screw jack is given by (where α = Helix angle, and φ = Angle of friction.)

tan(α + φ)/tanα
tan(α - φ)/tanα
tanα/tan (α + φ)
None of these

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Engineering Mechanics
The resultant of two equal forces ‘P’ making an angle ‘θ’, is given by

2P cosθ/2
2P tanθ/2
2P sinθ/2
2P cotθ/2

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MORE MCQ ON Engineering Mechanics

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