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)

If the modulus of elasticity for a given material is twice its modulus of rigidity, then bulk modulus is equal to

A

2C

B

3C

C

$$\frac{{2{\text{C}}}}{3}$$

D

$$\frac{{3{\text{C}}}}{2}$$

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

Rectangular ABCD is similar to rectangular EFGH. The length of each side of rectangle EFGH is 24 times the length of corresponding side of rectangle ABCD.The perameter of rectangular ABCD is 120 feet.What is the parameter of rectangular paramaeter EFGH?

A

288feet

B

345.6feet

C

576feet

D

691.2feet

The area of a rectangular field is 52000 sq. meters. This rectangular area has been drawn on a map to the scale 1 cm to 100 m. The length is shown as 3.25 cm on the map. The breadth of the rectangular field in the map is -

A

1.6 m

B

160 m

C

160 cm

D

1.6 cm

A simply supported uniform rectangular bar breadth b, depth d and length L carries an isolated load W at its mid-span. The same bar experiences an extension e under same tensile load. The ratio of the maximum deflection to the elongation, is

A

$$\frac{{\text{L}}}{{\text{d}}}$$

B

$$\frac{{\text{L}}}{{2{\text{d}}}}$$

C

$${\left( {\frac{{\text{L}}}{{2{\text{d}}}}} \right)^2}$$

D

$${\left( {\frac{{\text{L}}}{{3{\text{d}}}}} \right)^2}$$

A thin cylindrical shell of diameter (d), length ($$l$$) and thickness (t) is subjected to an internal pressure (p). The ratio of longitudinal strain to hoop strain is

A

$$\frac{{{\text{m}} - 2}}{{2{\text{m}} - 1}}$$

B

$$\frac{{2{\text{m}} - 1}}{{{\text{m}} - 2}}$$

C

$$\frac{{{\text{m}} - 2}}{{2{\text{m}} + 1}}$$

D

$$\frac{{2{\text{m}} + 1}}{{{\text{m}} - 2}}$$

Young's modulus of elasticity of a material is the slope of the initial linear portion of the stress-strain curve. It decreases ap-preciablyby

A

Alloying additions

B

Heat treatment

C

Cold work

D

Increasing temperature

A cylinderical rod subjected to a tensile strain within the elastic limit undergoes a volume change. If the volume strain is equal to half the tensile strain, then the Poisson's ratio of the rod is

A

0

B

0.33

C

0.44

D

0.25

The length of a rectangular plot is 60% more than its breadth . If the difference between the length and the breadth of that rectangle is 24 cm. what is the area of that rectangle ?

A

2400 sq. cm

B

2480 .cm

C

2560 sq.cm

D

Data inadequate

The breadth of a rectangular field is 5m. Its length is thrice the breadth. What is the total length of facing required to the if the fence is to be built leaving 0.5 m of space from each side ?

A

56m

B

70m

C

44m

D

38m

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)

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