4791 + Mcqs in Mechanical Engineering Page 61 McqOptions

3001.	The hoop stress in a thin cylindrical shell is
A.	longitudinal stress
B.	compressive stress
C.	radial stress
D.	circumferential tensile stress
Answer» E.

Discussion

3002.	In the below figure, curve D represents mild steel.
A.	Yes
B.	No
Answer» B. No

Discussion

3003.	Which of the following is a proper sequence?
A.	proportional limit, elastic limit, yielding, failure
B.	elastic limit, proportional limit, yielding, failure
C.	yielding, proportional limit, elastic limit, failure
D.	none of the above
Answer» B. elastic limit, proportional limit, yielding, failure

Discussion

3004.	When a body is subjected to a direct tensile stress ( x) in one plane accompanied by a simple shear stress ( xy ), the maximum normal stress is
A.	<img src="/_files/images/mechanical-engineering/strength-of-materials/90-86-1.png">
B.	<img src="/_files/images/mechanical-engineering/strength-of-materials/90-86-2.png">
C.	<img src="/_files/images/mechanical-engineering/strength-of-materials/90-86-3.png">
D.	<img src="/_files/images/mechanical-engineering/strength-of-materials/90-86-4.png">
Answer» B. <img src="/_files/images/mechanical-engineering/strength-of-materials/90-86-2.png">

Discussion

3005.	The strain energy stored in a body, when suddenly loaded, is __________ the strain energy stored when same load is applied gradually.
A.	equal to
B.	one-half
C.	twice
D.	four times
Answer» E.

Discussion

3006.	The proof resilience per unit volume of a material is known as modulus of resilience.
A.	True
B.	False
Answer» B. False

Discussion

3007.	In case of an over-reinforced beam, the depth of actual neutral axis is the same as that of the critical neutral axis.
A.	True
B.	False
Answer» C.

Discussion

3008.	In a watch, the spring is used to store strain energy. This energy is released
A.	to stop the watch
B.	to run the watch
C.	to change the time
D.	all of these
Answer» C. to change the time

Discussion

3009.	The thickness of a thin cylindrical shell with hemispherical ends is __________ that of spherical ends.
A.	equal to
B.	more than
C.	less than
Answer» C. less than

Discussion

3010.	The assumption made in Euler's column theory is that
A.	the failure of column occurs due to buckling alone
B.	the length of column is very large as compared to its cross-sectional dimensions
C.	the column material obeys Hooke's law
D.	all of the above
Answer» E.

Discussion

3011.	The distance between the centres of rivets in adjacent rows of zig-zag riveted joint, is called back pitch.
A.	True
B.	False
Answer» C.

Discussion

3012.	The bending moment at the ends of a simply supported beam will be zero.
A.	Yes
B.	No
Answer» B. No

Discussion

3013.	Which of the following is the correct torsion equation?
A.	<img src="/_files/images/mechanical-engineering/strength-of-materials/101-202-1.png">
B.	<img src="/_files/images/mechanical-engineering/strength-of-materials/109-279-1.png">
C.	<img src="/_files/images/mechanical-engineering/strength-of-materials/109-279-2.png">
D.	<img src="/_files/images/mechanical-engineering/strength-of-materials/109-279-3.png">
Answer» C. <img src="/_files/images/mechanical-engineering/strength-of-materials/109-279-2.png">

Discussion

3014.	According to Euler's column theory, the crippling load of a column is given by p = 2 EI/Cl2 In this equation, the value of C for a column with both ends hinged, is
A.	1/4
B.	1/2
C.	1
D.	2
Answer» D. 2

Discussion

3015.	The extension of a circular bar tapering uniformly from diameter d1 at one end to diameter d2 at the other end, and subjected to an axial pull of P is __________ the extension of a circular bar of diameter d1 d2 subjected to the same load P.
A.	equal to
B.	less than
C.	greater than
Answer» B. less than

Discussion

3016.	The ultimate tensile stress for mild steel is __________ the ultimate compressive stress.
A.	equal to
B.	less than
C.	more than
Answer» D.

Discussion

3017.	The direct stress induced in a long column is __________ as compared to bending stress.
A.	same
B.	more
C.	less
D.	negligible
Answer» E.

Discussion

3018.	Hook's law holds good up to
A.	yield point
B.	elastic limit
C.	plastic limit
D.	breaking point
Answer» C. plastic limit

Discussion

3019.	In a thin cylindrical shell subjected to an internal pressure p, the ratio of longitudinal stress to the hoop stress is
A.	1/2
B.	3/4
C.	1
D.	1.5
Answer» B. 3/4

Discussion

3020.	The maximum shear stress is __________ the algebraic difference of maximum and minimum normal stresses.
A.	equal to
B.	one-fourth
C.	one-half
D.	twice
Answer» D. twice

Discussion

3021.	A flitched beam is used to
A.	change the shape of the beam
B.	effect the saving in material
C.	equalise the strength in tension and compression
D.	increase the cross-section of the beam
Answer» D. increase the cross-section of the beam

Discussion

3022.	A closely-coiled helical spring of stiffness k is cut into (n) equal parts. The stiffness in each part of the spring will be
A.	<i>k<span class="root">n</span></i>
B.	<i>n<span class="root">k</span></i>
C.	<i>nk</i>
D.	<i>nk</i>
E.	<sup>2</sup>
Answer» D. <i>nk</i>

Discussion

3023.	The ratio of the lateral strain to the linear strain is called
A.	modulus of elasticity
B.	modulus of rigidity
C.	bulk modulus
D.	Poisson's ratio
Answer» E.

Discussion

3024.	A thick pressure vessel is always used for the generation of steam, as it can withstand high pressures.
A.	True
B.	False
Answer» C.

Discussion

3025.	Shear modulus is the ratio of
A.	linear stress to linear strain
B.	linear stress to lateral strain
C.	volumetric strain to linear strain
D.	shear stress to shear strain
Answer» E.

Discussion

3026.	The assumption made in the theory of the reinforced cement concrete beam is that
A.	all the tensile stresses are taken up by the steel reinforcement only
B.	there is a sufficient bond between steel and concrete
C.	the steel and concrete are stressed within its elastic limit
D.	all of the above
Answer» E.

Discussion

3027.	When there is a sudden increase or decrease in shear force diagram between any two points, it indicates that there is a
A.	point load at the two points
B.	no loading between the two points
C.	uniformly distributed load between the two points
D.	uniformly varying load between the two points
Answer» B. no loading between the two points

Discussion

3028.	A leaf spring is supported at the
A.	ends and loaded at the centre
B.	centre and loaded at the ends
C.	ends and loaded anywhere
D.	centre and loaded anywhere
Answer» C. ends and loaded anywhere

Discussion

3029.	In leaf springs, the maximum bending stress developed in the plates is (where W = Load acting on the spring, l = Span of the spring, n = Number of plates, b = Width of plates, and t = Thickness of plates)
A.	<img src="/_files/images/mechanical-engineering/strength-of-materials/112-310-1.png">
B.	<img src="/_files/images/mechanical-engineering/strength-of-materials/112-310-2.png">
C.	<img src="/_files/images/mechanical-engineering/strength-of-materials/112-310-3.png">
D.	<img src="/_files/images/mechanical-engineering/strength-of-materials/112-310-4.png">
Answer» C. <img src="/_files/images/mechanical-engineering/strength-of-materials/112-310-3.png">

Discussion

3030.	A closely-coiled helical spring is cut into two halves. The stiffness of the resulting spring will be
A.	same
B.	double
C.	half
D.	one-fourth
Answer» C. half

Discussion

3031.	The Rankine's formula holds good for
A.	short columns
B.	long columns
C.	both short and long columns
D.	weak columns
Answer» D. weak columns

Discussion

3032.	In case of an under-reinforced beam, the depth of actual neutral axis is __________ that of the critical neutral axis.
A.	same as
B.	less than
C.	greater than
Answer» C. greater than

Discussion

3033.	The maximum shear stress developed in a beam of circular section is __________ the average shear stress.
A.	equal to
B.	4/3 times
C.	1.5 times
D.	twice
Answer» C. 1.5 times

Discussion

3034.	When a body is subjected to a direct tensile stress ( ) in one plane, then maximum normal stress occurs at a section inclined at __________ to the normal of the section.
A.	0
B.	30
C.	45
D.	90
Answer» B. 30

Discussion

3035.	For no tension condition in the base of a short column of circular section, the line of action of the load should be within a circle of diameter equal to __________ of the main circle.
A.	one-half
B.	one-third
C.	one-fourth
D.	one-eighth
Answer» D. one-eighth

Discussion

3036.	When a material is loaded within elastic limit, the material will regain its shape and size when the load is removed.
A.	Agree
B.	Disagree
Answer» B. Disagree

Discussion

3037.	The bending stress in abeam is __________ bending moment.
A.	equal to
B.	less than
C.	more than
D.	directly proportional to
Answer» E.

Discussion

3038.	The tensile strength of ductile materials is __________ its compressive strength.
A.	equal to
B.	less than
C.	greater than
Answer» D.

Discussion

3039.	The steel bars in a reinforced cement concrete beam are embedded __________ of the beam.
A.	in the centre
B.	near the bottom
C.	near the top
D.	at any position
Answer» C. near the top

Discussion

3040.	A rectangular beam subjected to a bending moment is shown in the below figure. The upper layer of the beam will be in tension.
A.	True
B.	False
Answer» C.

Discussion

3041.	The strain energy stored in a body due to shear stress, is (where = Shear stress, C = Shear modulus, and V = Volume of the body)
A.	<img src="/_files/images/mechanical-engineering/strength-of-materials/94-126-1.png">
B.	<img src="/_files/images/mechanical-engineering/strength-of-materials/94-126-2.png">
C.	<img src="/_files/images/mechanical-engineering/strength-of-materials/94-126-3.png">
D.	<img src="/_files/images/mechanical-engineering/strength-of-materials/94-126-4.png">
Answer» D. <img src="/_files/images/mechanical-engineering/strength-of-materials/94-126-4.png">

Discussion

3042.	In case of eccentrically loaded struts __________ is preferred.
A.	solid section
B.	hollow section
C.	composite section
D.	reinforced section
Answer» D. reinforced section

Discussion

3043.	In a stress-strain diagram as shown in the below figure, the curve A represents
A.	mild steel
B.	soft brass
C.	low carbon steel
D.	cold rolled steel
Answer» C. low carbon steel

Discussion

3044.	The strength of the shaft is judged by the torque transmitted by the shaft.
A.	Yes
B.	No
Answer» B. No

Discussion

3045.	The shear force at a certain point on a beam changes sign from +ve value to -ve value or vice versa. The bending moment at that point will be zero.
A.	True
B.	False
Answer» C.

Discussion

3046.	In a riveted joint, when the number of rivets decreases from the inner most row to outer most row, the joint is said to be
A.	chain riveted
B.	zig-zag riveted
C.	diamond riveted
D.	none of these
Answer» D. none of these

Discussion

3047.	In the above question, the normal stress on an oblique section will be maximum, when is equal to
A.	0
B.	30
C.	45
D.	90
Answer» B. 30

Discussion

3048.	The total strain energy stored in a body is called proof resilience.
A.	Agree
B.	Disagree
Answer» C.

Discussion

3049.	The thermal stress in a bar is __________ proportional to the change in temperature.
A.	directly
B.	indirectly
Answer» B. indirectly

Discussion

3050.	The load at which the column just buckles, is known as
A.	buckling load
B.	critical load
C.	crippling load
D.	any one of these
Answer» E.

Discussion

Explore topic-wise MCQs in Engineering.

The hoop stress in a thin cylindrical shell is

In the below figure, curve D represents mild steel.

Which of the following is a proper sequence?

When a body is subjected to a direct tensile stress ( x) in one plane accompanied by a simple shear stress ( xy ), the maximum normal stress is

The strain energy stored in a body, when suddenly loaded, is __________ the strain energy stored when same load is applied gradually.

The proof resilience per unit volume of a material is known as modulus of resilience.

In case of an over-reinforced beam, the depth of actual neutral axis is the same as that of the critical neutral axis.

In a watch, the spring is used to store strain energy. This energy is released

The thickness of a thin cylindrical shell with hemispherical ends is __________ that of spherical ends.

The assumption made in Euler's column theory is that

The distance between the centres of rivets in adjacent rows of zig-zag riveted joint, is called back pitch.

The bending moment at the ends of a simply supported beam will be zero.

Which of the following is the correct torsion equation?

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

The extension of a circular bar tapering uniformly from diameter d1 at one end to diameter d2 at the other end, and subjected to an axial pull of P is __________ the extension of a circular bar of diameter d1 d2 subjected to the same load P.

The ultimate tensile stress for mild steel is __________ the ultimate compressive stress.

The direct stress induced in a long column is __________ as compared to bending stress.

Hook's law holds good up to

In a thin cylindrical shell subjected to an internal pressure p, the ratio of longitudinal stress to the hoop stress is

The maximum shear stress is __________ the algebraic difference of maximum and minimum normal stresses.

A flitched beam is used to

A closely-coiled helical spring of stiffness k is cut into (n) equal parts. The stiffness in each part of the spring will be

The ratio of the lateral strain to the linear strain is called

A thick pressure vessel is always used for the generation of steam, as it can withstand high pressures.

Shear modulus is the ratio of

The assumption made in the theory of the reinforced cement concrete beam is that

When there is a sudden increase or decrease in shear force diagram between any two points, it indicates that there is a

A leaf spring is supported at the

In leaf springs, the maximum bending stress developed in the plates is (where W = Load acting on the spring, l = Span of the spring, n = Number of plates, b = Width of plates, and t = Thickness of plates)

A closely-coiled helical spring is cut into two halves. The stiffness of the resulting spring will be

The Rankine's formula holds good for

In case of an under-reinforced beam, the depth of actual neutral axis is __________ that of the critical neutral axis.

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

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

For no tension condition in the base of a short column of circular section, the line of action of the load should be within a circle of diameter equal to __________ of the main circle.

When a material is loaded within elastic limit, the material will regain its shape and size when the load is removed.

The bending stress in abeam is __________ bending moment.

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

The steel bars in a reinforced cement concrete beam are embedded __________ of the beam.

A rectangular beam subjected to a bending moment is shown in the below figure. The upper layer of the beam will be in tension.

The strain energy stored in a body due to shear stress, is (where = Shear stress, C = Shear modulus, and V = Volume of the body)

In case of eccentrically loaded struts __________ is preferred.

In a stress-strain diagram as shown in the below figure, the curve A represents

The strength of the shaft is judged by the torque transmitted by the shaft.

The shear force at a certain point on a beam changes sign from +ve value to -ve value or vice versa. The bending moment at that point will be zero.

In a riveted joint, when the number of rivets decreases from the inner most row to outer most row, the joint is said to be

In the above question, the normal stress on an oblique section will be maximum, when is equal to

The total strain energy stored in a body is called proof resilience.

The thermal stress in a bar is __________ proportional to the change in temperature.

The load at which the column just buckles, is known as