Related Questions

When a bar of length l, width b and thickness t is subjected to a pull of P, its
A Length, width and thickness increases
B Length, width and thickness decreases
C Length increases, width and thickness decreases
D Length decreases, width and thickness increases
When a bar of length '$$l$$' and diameter 'd' is rigidly fixed at the upper end and hanging freely, then the total elongation produced in the bar due to its own weight is (where w = Weight per unit volume of the bar)
A $$\frac{{{\text{w}}l}}{{2{\text{E}}}}$$
B $$\frac{{{\text{w}}{l^2}}}{{2{\text{E}}}}$$
C $$\frac{{{\text{w}}{l^3}}}{{2{\text{E}}}}$$
D $$\frac{{{\text{w}}{l^4}}}{{2{\text{E}}}}$$
When a rectangular bar of length $$l$$, breadth b and thickness t is subjected to an axial pull of P, then linear strain ($$\varepsilon $$) is given by (where E = Modulus of elasticity)
A $$\varepsilon = \frac{{\text{P}}}{{{\text{btE}}}}$$
B $$\varepsilon = \frac{{{\text{btE}}}}{{\text{P}}}$$
C $$\varepsilon = \frac{{{\text{bt}}}}{{{\text{PE}}}}$$
D $$\varepsilon = \frac{{{\text{PE}}}}{{{\text{bt}}}}$$
A bar L metre long and having its area of cross-section A, is subjected to a gradually applied tensile load W. The strain energy stored in the bar is
A $$\frac{{{\text{WL}}}}{{2{\text{AE}}}}$$
B $$\frac{{{\text{WL}}}}{{{\text{AE}}}}$$
C $$\frac{{{{\text{W}}^2}{\text{L}}}}{{{\text{AE}}}}$$
D $$\frac{{{{\text{W}}^2}{\text{L}}}}{{2{\text{AE}}}}$$
When a bar is subjected to a change of temperature and its deformation is prevented, the stress induced in the bar is
A Tensile stress
B Compressive stress
C Shear stress
D Thermal stress
The perimeter of a rectangle is 24 inches, and its length is 3 times its width. What are the length and the width of the rectangle?
A Length: 6 inches, Width: 2 inches
B Length: 9 inches, Width: 3 inches
C Length: 12 inches, Width: 4 inches
D Length: 18 inches, Width: 6 inches
ABCD is a rectangle . If its lengthis decreased by 5 meter and the width is increased by 3 mete3r, the area de3creases by 2 meter, the area inceases by 67 square meter, What is the width width of ABCD?
A 9 meter
B 17 meter
C 18 meter
D 22 meter
The length of a conical bar is $$l$$, diameter of base is d and weight per unit volume is w. It is fixes at its upper end and hanging freely. The elongation of the bar under the action of its own weight will be
A $$\frac{{{\text{w}}{l^2}}}{{2{\text{E}}}}$$
B $$\frac{{{\text{w}}{l^2}}}{{4{\text{E}}}}$$
C $$\frac{{{\text{w}}{l^2}}}{{6{\text{E}}}}$$
D $$\frac{{{\text{w}}{l^2}}}{{8{\text{E}}}}$$
The minimum thickness of the cover at the end of a reinforcing bar should not be less than twice the diameter of the bar subject to a minimum of
A 10 mm
B 15 mm
C 20 mm
D 25 mm
When heated an iron bar expands 0.2% . If the increased length is 1cm , what is the original length of the bar ?
A 500cm
B 5cm
C 0.97cm
D 1.97cm

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