4791 + Mcqs in Mechanical Engineering Page 63 McqOptions

3101.	The neutral axis of the symmetrical beam does not pass through the centroid of the beam.
A.	Agree
B.	Disagree
Answer» C.

Discussion

3102.	The Poisson's ratio for steel varies from
A.	0.23 to 0.27
B.	0.27 to 0.30
C.	0.31 to 0.34
D.	0.32 to 0.42
Answer» C. 0.31 to 0.34

Discussion

3103.	A uniformly distributed load may be assumed to behave like a point load at the centre of gravity of the load for all sorts of calculations.
A.	Correct
B.	Incorrect
Answer» B. Incorrect

Discussion

3104.	The unit of strain is
A.	N-mm
B.	N/mm
C.	mm
D.	no unit
Answer» E.

Discussion

3105.	When a bar of length l, width b and thickness t is subjected to a push 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 tickness increases
Answer» E.

Discussion

3106.	The maximum deflection of a cantilever beam of length l with a point load W at the free end is
A.	<img src="/_files/images/mechanical-engineering/strength-of-materials/105-251-1.png">
B.	<img src="/_files/images/mechanical-engineering/strength-of-materials/105-251-2.png">
C.	<img src="/_files/images/mechanical-engineering/strength-of-materials/105-251-3.png">
D.	<img src="/_files/images/mechanical-engineering/strength-of-materials/105-251-4.png">
Answer» B. <img src="/_files/images/mechanical-engineering/strength-of-materials/105-251-2.png">

Discussion

3107.	The maximum bending moment of a cantilever beam of length l and carrying a uniformly distributed load of w per unit length lies at the middle of its length.
A.	True
B.	False
Answer» C.

Discussion

3108.	A circular shaft fixed at, A has diameter D for half of its length and diameter D/2 over the other half, as shown in the below figure. If the rotation of B relative to A is 0.1 radian, the rotation of C relative to B will be
A.	0.4 radian
B.	0.8 radian
C.	1.6 radian
D.	3.2 radian
Answer» D. 3.2 radian

Discussion

3109.	Young's modulus may be defined as the ratio of
A.	linear stress to lateral strain
B.	lateral strain to linear strain
C.	linear stress to linear strain
D.	shear stress to shear strain
Answer» D. shear stress to shear strain

Discussion

3110.	The maximum shear stress, in the given figure, is equal to __________ of the Mohr's circle.
A.	radius
B.	diameter
C.	circumference
D.	area
Answer» B. diameter

Discussion

3111.	When a body is subjected to direct tensile stresses ( x and y ) in two mutually perpendicular directions, accompanied by a simple shear stress xy , then in Mohr's circle method, the circle radius is taken as
A.	<img src="/_files/images/mechanical-engineering/strength-of-materials/92-108-1.png">
B.	<img src="/_files/images/mechanical-engineering/strength-of-materials/92-108-2.png">
C.	<img src="/_files/images/mechanical-engineering/strength-of-materials/92-108-3.png">
D.	<img src="/_files/images/mechanical-engineering/strength-of-materials/92-108-4.png">
Answer» D. <img src="/_files/images/mechanical-engineering/strength-of-materials/92-108-4.png">

Discussion

3112.	According to Euler's column theory, the crippling load for a column of length (l) with one end fixed and the other end hinged, is
A.	<img src="/_files/images/mechanical-engineering/strength-of-materials/121-406-1.png">
B.	<img src="/_files/images/mechanical-engineering/strength-of-materials/121-406-2.png">
C.	<img src="/_files/images/mechanical-engineering/strength-of-materials/121-406-4.png">
D.	<img src="/_files/images/mechanical-engineering/strength-of-materials/121-406-3.png">
Answer» D. <img src="/_files/images/mechanical-engineering/strength-of-materials/121-406-3.png">

Discussion

3113.	The relation between modulus of elasticity (E) and modulus of rigidity (C) is given by
A.	<img src="/_files/images/mechanical-engineering/strength-of-materials/88-62-1.png">
B.	<img src="/_files/images/mechanical-engineering/strength-of-materials/88-62-2.png">
C.	<img src="/_files/images/mechanical-engineering/strength-of-materials/88-62-3.png">
D.	<img src="/_files/images/mechanical-engineering/strength-of-materials/88-62-4.png">
Answer» B. <img src="/_files/images/mechanical-engineering/strength-of-materials/88-62-2.png">

Discussion

3114.	The strain energy stored in a body, when the load is gradually applied, is (where = Stress in the material of the body, V = Volume of the body, and E = Modulus of elasticity of the material)
A.	<img src="/_files/images/mechanical-engineering/strength-of-materials/93-121-1.png">
B.	<img src="/_files/images/mechanical-engineering/strength-of-materials/93-121-2.png">
C.	<img src="/_files/images/mechanical-engineering/strength-of-materials/93-121-3.png">
D.	<img src="/_files/images/mechanical-engineering/strength-of-materials/93-121-4.png">
Answer» E.

Discussion

3115.	The deformation of a bar under its own weight is __________ the deformation, if the same body is subjected to a direct load equal to weight of the body.
A.	equal to
B.	half
C.	double
D.	quadruple
Answer» C. double

Discussion

3116.	The maximum bending moment of a simply supported beam with central point load lies at the point of loading.
A.	True
B.	False
Answer» B. False

Discussion

3117.	When the shear force diagram between any two points is an inclined straight line, it indicates that there is a uniformly varying load between the two points.
A.	Yes
B.	No
Answer» B. No

Discussion

3118.	If the diameter of pressure vessel is 15 times the wall thickness, the vessel is said to be a thick shell.
A.	Agree
B.	Disagree
Answer» B. Disagree

Discussion

3119.	The rivets are used for __________ fastenings.
A.	permanent
B.	temporary
Answer» B. temporary

Discussion

3120.	The ratio of shear modulus to the modulus of elasticity for a Poisson's ratio of 0.4 will be
A.	5/7
B.	7/5
C.	5/14
D.	14/5
Answer» D. 14/5

Discussion

3121.	The maximum shear stress developed in a beam of rectangular section is __________ the average shear stress.
A.	equal to
B.	4/3 times
C.	1.5 times
D.	twice
Answer» D. twice

Discussion

3122.	If the magnitude of direct stress and bending stress is equal, then there will be zero stress at one of the extreme ends of a column.
A.	Agree
B.	Disagree
Answer» B. Disagree

Discussion

3123.	The ductility of the material __________ with the decrease in percentage elongation of a specimen under tensile test.
A.	increases
B.	decreases
C.	remains same
Answer» C. remains same

Discussion

3124.	In a riveted joint, when the rivets in.the adjacent rows are staggered in such a way that every rivet is in the middle of the two rivets of the opposite row, the joint is said to be diamond riveted.
A.	Yes
B.	No
Answer» C.

Discussion

3125.	Lame's theory is associated with
A.	thin cylindrical shells
B.	thick cylindrical shells
C.	direct and bending stresses
D.	none of these
Answer» C. direct and bending stresses

Discussion

3126.	The buckling load for a given column depends upon
A.	area of cross-section of the column
B.	length and least radius of gyration of the column
C.	modulus of elasticity for the material of the column
D.	all of the above
Answer» E.

Discussion

3127.	A continuous beam is one which is
A.	fixed at both ends
B.	fixed at one end and free at the other end
C.	supported on more than two supports
D.	extending beyond the supports
Answer» D. extending beyond the supports

Discussion

3128.	When a body is subjected to two equal and opposite pulls, as a result of which the body tends to extend its length, the stress and strain induced is
A.	compressive stress, tensile strain
B.	tensile stress, compressive strain
C.	tensile stress, tensile strain
D.	compressive stress, compressive strain
Answer» D. compressive stress, compressive strain

Discussion

3129.	The hoop stress in a riveted cylindrical shell of diameter (d), thickness (t) and subjected to an internal pressure (p) is (where = Efficiency of the riveted joint)
A.	<img src="/_files/images/mechanical-engineering/strength-of-materials/118-378-1.png">
B.	<img src="/_files/images/mechanical-engineering/strength-of-materials/118-378-2.png">
C.	<img src="/_files/images/mechanical-engineering/strength-of-materials/118-378-3.png">
D.	<img src="/_files/images/mechanical-engineering/strength-of-materials/118-378-4.png">
Answer» C. <img src="/_files/images/mechanical-engineering/strength-of-materials/118-378-3.png">

Discussion

3130.	For a given stress, the ratio of moment of resistance of a beam of square cross-section when placed with its two sides horizontal to the moment of resistance with its diagonal horizontal, is
A.	1/2
B.	1
C.	1/
D.	<span class="root">2</span>
E.	<span class="root">2</span>
Answer» E. <span class="root">2</span>

Discussion

3131.	The compressive strength of brittle materials is __________ its tensile strength.
A.	equal to
B.	less than
C.	greater than
Answer» D.

Discussion

3132.	The shear force diagram of a cantilever beam of length l and carrying a uniformly distributed load of w per unit length will be
A.	a right angled triangle
B.	an issoscles triangle
C.	an equilateral triangle
D.	a rectangle
Answer» B. an issoscles triangle

Discussion

3133.	The longitudinal stress in a riveted cylindrical shell of diameter (d), thickness (t) and subjected to an internal pressure (p) is
A.	<img src="/_files/images/mechanical-engineering/strength-of-materials/118-378-1.png">
B.	<img src="/_files/images/mechanical-engineering/strength-of-materials/118-378-2.png">
C.	<img src="/_files/images/mechanical-engineering/strength-of-materials/118-378-3.png">
D.	<img src="/_files/images/mechanical-engineering/strength-of-materials/118-378-4.png">
Answer» D. <img src="/_files/images/mechanical-engineering/strength-of-materials/118-378-4.png">

Discussion

3134.	When a rectangular beam is loaded transversely, the maximum tensile stress is developed on the
A.	top layer
B.	bottom layer
C.	neutral axis
D.	every cross-section
Answer» B. bottom layer

Discussion

3135.	Whenever some external system of forces acts on a body, it undergoes some deformation. As the body undergoes some deformation, it sets up some resistance to the deformation. This resistance per unit area to deformation, is called
A.	strain
B.	stress
C.	pressure
D.	modulus of elasticity
Answer» C. pressure

Discussion

3136.	The tensile test is carried on __________ materials.
A.	ductile
B.	brittle
C.	malleable
D.	plastic
Answer» B. brittle

Discussion

3137.	A fixed beam is one which is fixed at __________ of its ends.
A.	one
B.	both
Answer» C.

Discussion

3138.	Factor of safety is defined as the ratio of
A.	ultimate stress to working stress
B.	working stress to ultimate stress
C.	breaking stress to ultimate stress
D.	ultimate stress to breaking stress
Answer» B. working stress to ultimate stress

Discussion

3139.	The springs in cars are used to store strain energy.
A.	Correct
B.	Incorrect
Answer» C.

Discussion

3140.	For riveting, the size of hole drilled in plates is __________ shank diameter of rivet.
A.	equal to
B.	less than
C.	greater than
Answer» D.

Discussion

3141.	When the retained material is subjected to some superimposed or surcharged load, the total horizontal pressure due to surcharged load is (where p = Intensity of the supercharged load)
A.	<img src="/_files/images/mechanical-engineering/strength-of-materials/123-438-1.png">
B.	<img src="/_files/images/mechanical-engineering/strength-of-materials/123-438-2.png">
C.	<img src="/_files/images/mechanical-engineering/strength-of-materials/123-438-3.png">
D.	<img src="/_files/images/mechanical-engineering/strength-of-materials/123-438-4.png">
Answer» B. <img src="/_files/images/mechanical-engineering/strength-of-materials/123-438-2.png">

Discussion

3142.	When a closely-coiied helical spring of mean diameter (D) is subjected to an axial load (W), the deflection of the spring ( ) is given by (where d = Diameter of spring wire, n = No. of turns of the spring, and C = Modulus of rigidity for the spring material)
A.	<img src="/_files/images/mechanical-engineering/strength-of-materials/113-315-1.png">
B.	<img src="/_files/images/mechanical-engineering/strength-of-materials/113-315-2.png">
C.	<img src="/_files/images/mechanical-engineering/strength-of-materials/113-315-3.png">
D.	<img src="/_files/images/mechanical-engineering/strength-of-materials/113-315-4.png">
Answer» E.

Discussion

3143.	In spring balances, the spring is used
A.	to apply forces
B.	to measure forces
C.	to absorb shocks
D.	to store strain energy
Answer» C. to absorb shocks

Discussion

3144.	According to Euler's column theory, the crippling load of a column is given by p = 2 EI/Cl2. In the Euler's formula, the value of C for a column with both ends fixed is 4.
A.	Agree
B.	Disagree
Answer» C.

Discussion

3145.	Fatigue test is carried out for
A.	stresses varying between two limits of equal value, but of opposite sign
B.	stresses varying between two limits of unequal value, but of opposite sign
C.	stresses varying between two limits of unequal value but of same sign
D.	all of the above
Answer» E.

Discussion

3146.	Every direct stress is always accompanied by a strain in its own direction and an opposite kind of strain in every direction, at right angles to it. Such a strain is known as
A.	linear strain
B.	lateral strain
C.	volumetric strain
D.	shear strain
Answer» C. volumetric strain

Discussion

3147.	Two solid shafts 'A' and 'B' are made of the same material. The shaft 'A' is of 50 mm diameter and shaft 'B' is of 100 mm diameter. The strength of shaft 'B' is __________ as that of shaft A.
A.	one-half
B.	double
C.	four times
D.	eight times
Answer» E.

Discussion

3148.	In calculating the strength of a riveted joint in tearing, shearing and crushing, the
A.	actual diameter of rivet is used
B.	actual diameter of hole drilled for rivet is used
C.	mean diameter of hole drilled and rivet is used
D.	smaller of the rivet diameter and hole diameter is used
Answer» C. mean diameter of hole drilled and rivet is used

Discussion

3149.	The value of equivalent length is taken to be half of the actual length of a column with one end fixed and the other end free.
A.	Agree
B.	Disagree
Answer» C.

Discussion

3150.	The unit of Young's modulus is same as that of stress.
A.	True
B.	False
Answer» B. False

Discussion

Explore topic-wise MCQs in Engineering.

The neutral axis of the symmetrical beam does not pass through the centroid of the beam.

The Poisson's ratio for steel varies from

A uniformly distributed load may be assumed to behave like a point load at the centre of gravity of the load for all sorts of calculations.

The unit of strain is

When a bar of length l, width b and thickness t is subjected to a push of P, its

The maximum deflection of a cantilever beam of length l with a point load W at the free end is

The maximum bending moment of a cantilever beam of length l and carrying a uniformly distributed load of w per unit length lies at the middle of its length.

A circular shaft fixed at, A has diameter D for half of its length and diameter D/2 over the other half, as shown in the below figure. If the rotation of B relative to A is 0.1 radian, the rotation of C relative to B will be

Young's modulus may be defined as the ratio of

The maximum shear stress, in the given figure, is equal to __________ of the Mohr's circle.

When a body is subjected to direct tensile stresses ( x and y ) in two mutually perpendicular directions, accompanied by a simple shear stress xy , then in Mohr's circle method, the circle radius is taken as

According to Euler's column theory, the crippling load for a column of length (l) with one end fixed and the other end hinged, is

The relation between modulus of elasticity (E) and modulus of rigidity (C) is given by

The strain energy stored in a body, when the load is gradually applied, is (where = Stress in the material of the body, V = Volume of the body, and E = Modulus of elasticity of the material)

The deformation of a bar under its own weight is __________ the deformation, if the same body is subjected to a direct load equal to weight of the body.

The maximum bending moment of a simply supported beam with central point load lies at the point of loading.

When the shear force diagram between any two points is an inclined straight line, it indicates that there is a uniformly varying load between the two points.

If the diameter of pressure vessel is 15 times the wall thickness, the vessel is said to be a thick shell.

The rivets are used for __________ fastenings.

The ratio of shear modulus to the modulus of elasticity for a Poisson's ratio of 0.4 will be

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

If the magnitude of direct stress and bending stress is equal, then there will be zero stress at one of the extreme ends of a column.

The ductility of the material __________ with the decrease in percentage elongation of a specimen under tensile test.

In a riveted joint, when the rivets in.the adjacent rows are staggered in such a way that every rivet is in the middle of the two rivets of the opposite row, the joint is said to be diamond riveted.

Lame's theory is associated with

The buckling load for a given column depends upon

A continuous beam is one which is

When a body is subjected to two equal and opposite pulls, as a result of which the body tends to extend its length, the stress and strain induced is

The hoop stress in a riveted cylindrical shell of diameter (d), thickness (t) and subjected to an internal pressure (p) is (where = Efficiency of the riveted joint)

For a given stress, the ratio of moment of resistance of a beam of square cross-section when placed with its two sides horizontal to the moment of resistance with its diagonal horizontal, is

The compressive strength of brittle materials is __________ its tensile strength.

The shear force diagram of a cantilever beam of length l and carrying a uniformly distributed load of w per unit length will be

The longitudinal stress in a riveted cylindrical shell of diameter (d), thickness (t) and subjected to an internal pressure (p) is

When a rectangular beam is loaded transversely, the maximum tensile stress is developed on the

Whenever some external system of forces acts on a body, it undergoes some deformation. As the body undergoes some deformation, it sets up some resistance to the deformation. This resistance per unit area to deformation, is called

The tensile test is carried on __________ materials.

A fixed beam is one which is fixed at __________ of its ends.

Factor of safety is defined as the ratio of

The springs in cars are used to store strain energy.

For riveting, the size of hole drilled in plates is __________ shank diameter of rivet.

When the retained material is subjected to some superimposed or surcharged load, the total horizontal pressure due to surcharged load is (where p = Intensity of the supercharged load)

When a closely-coiied helical spring of mean diameter (D) is subjected to an axial load (W), the deflection of the spring ( ) is given by (where d = Diameter of spring wire, n = No. of turns of the spring, and C = Modulus of rigidity for the spring material)

In spring balances, the spring is used

According to Euler's column theory, the crippling load of a column is given by p = 2 EI/Cl2. In the Euler's formula, the value of C for a column with both ends fixed is 4.

Fatigue test is carried out for

Every direct stress is always accompanied by a strain in its own direction and an opposite kind of strain in every direction, at right angles to it. Such a strain is known as

Two solid shafts 'A' and 'B' are made of the same material. The shaft 'A' is of 50 mm diameter and shaft 'B' is of 100 mm diameter. The strength of shaft 'B' is __________ as that of shaft A.

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

The value of equivalent length is taken to be half of the actual length of a column with one end fixed and the other end free.

The unit of Young's modulus is same as that of stress.