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Q1. | The ductility of a material __________ with the increase in percentage reduction in area of a specimen under tensile test. |

A. | increases [Correct Answer] |

B. | decreases [Wrong Answer] |

C. | remains same [Wrong Answer] |

D. | all of the above [Wrong Answer] |

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Explanation:-
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**Also Read Similar Questions Below :**

⇒ A beam supported at its both ends is not a simply supported beam.

True

False

Incorrect

None of these

⇒ In compression test, the fracture in cast iron specimen would occur along?

the axis of load

an oblique plane

at right angles to the axis of specimen

would not occur

⇒ The section modulus of a rectangular section about an axis through its C.G., is.

b/2

d/2

bd2/2

bd2/6

⇒ The assumption, generally, made in the theory of simple bending is that.

the beam material is perfectly homogenous and isotropic

the beam material is stressed within its elastic limit

the plane sections before bending remain plane after bending

all of the above

⇒ The stress at which the extension of the material takes place more quickly as compared to the increase in load, is called.

elastic limit

yield point

ultimate point

breaking point

⇒ The resultant stress on an inclined plane which is inclined at an angle θ to the normal cross-section of a body which is subjected to a direct tensile stress (σ) in one plane, is?

Ïƒ sin Î¸

Ïƒ cos Î¸

Ïƒ sin 2Î¸

Ïƒ cos 2Î¸

⇒ A flitched beam is used to

change the shape of the beam

effect the saving in material

equalise the strength in tension and compression

increase the cross-section of the beam

⇒ A column of length (

*l*) with both ends fixed may be considered as equivalent to a column of length __________ with one end fixed and the other end free.

l/8

l/4

l/2

l

⇒ For a shaft, the shear stress at a point is __________ the distance from the axis of the shaft.

equal to

directly proportional to

inversely proportional to

none of these

⇒ The maximum shear stress in a thin spherical shell subjected to an internal pressure (

*p*) is zero.

Yes

No

Minimum

None of these

⇒ A riveted joint in which every rivet of a row is opposite to other rivet of the outer row, is known as

chain riveted joint

diamond riveted joint

cross-cross riveted joint

zig-zag riveted joint

⇒ The total strain energy stored in a body is termed as

resilience

proof resilience

modulus of resilience

toughness

⇒ In the above question, the ratio of stiffness of spring '

*B*' to spring '

*A*' will be.

2

4

6

8

⇒ In calculating the strength of a riveted joint in tearing, shearing and crushing, the

actual diameter of rivet is used

actual diameter of hole drilled for rivet is used

mean diameter of hole drilled and rivet is used

smaller of the rivet diameter and hole diameter is used

⇒ The ratio of lateral strain to the linear strain within elastic limit is known as

Young's modulus

bulk modulus

modulus of rigidity

modulus of elasticity

⇒ The weakest section of a diamond riveting is the section which passes through

the first row

the second row

the central row

one rivet hole of the end row

⇒ Strain is defined as the ratio of

change in volume to original volume

change in length to original length

change in cross-sectional area to original cross-sectional area

any one of the above

⇒ The slenderness ratio is the ratio of.

area of column to least radius of gyration

length of column to least radius of gyration

least radius of gyration to area of column

least radius of gyration to length of column

⇒ In a thick cylindrical shell subjected to an internal pressure (

*p*), the maximum radial stress at the inner surface of the shell is.

zero

p (tensile)

-p (compressive)

2p (tensile)

⇒ A pressure vessel is said to be a thin shell when the ratio of wall thickness of the vessel to its diameter is __________ 1/10.

equal to

less than

greater than

none of these

⇒ When a body is subjected to a direct tensile stress (σ) in one plane, then maximum normal stress occurs at a section inclined at __________ to the normal of the section.

0Â°

30Â°

45Â°

90Â°

⇒ In a simple bending theory, one of the assumption is that the material of the beam is isotropic. This assumption means that the?

normal stress remains constant in all directions

normal stress varies linearly in the material

elastic constants are same in all the directions

elastic constants varies linearly in the material

⇒ When a beam is subjected to a bending moment, the strain in a layer is __________ the distance from the neutral axis.

equal to

directly proportional to

inversely proportional to

independent of

⇒ The volumetric strain is the ratio of the.

original thickness to the change in thickness

change in thickness to the original thickness

original volume to the change in volume

change in volume to the original volume

⇒ The deformation of a bar under its own weight compared to the deformation of same body subjected to a direct load equal to weight of the body is

same

double

half

four times

⇒ The maximum shear stress developed in a beam of rectangular section is __________ the average shear stress.

equal to

4/3 times

1.5 times

twice

⇒ According to Euler's column theory, the crippling load for a column of length (

*l*) with one end fixed and the other end free is __________ the crippling load for a similar column hinged at both the ends.

equal to

less than

more than

none of these

⇒ The pull required to crush the rivet per pitch length is.

p.t.Ïƒt

d.t.Ïƒc

Ï€/4 x d2 x Ïƒt

Ï€/4 x d2 x Ïƒc

⇒ When there is no increase or decrease in shear force between two points, it indicates that there is no change in the bending moment between these points.

True

False

Minimum

None of these

⇒ A spring used to absorb shocks and vibrations is.

conical spring

torsion spring

leaf spring

disc spring