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Free download in PDF Strength of Materials Multiple Choice Questions with Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
61
Shear stress induced in a shaft subjected to tension will be
A
maximum at periphery and zero at center
B
maximum at center
C
uniform throughout
D
none of the above
View Answer
Answer: none of the above
62
In a belt drive, the pulley diameter is doubled, the belt tension and pulley width remaining same. The changes required in key will be
A
increase key length
B
increase key depth
C
increase key width
D
double all the dimensions
View Answer
Answer: increase key width
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63
A key is subjected to side pressure as well at shearing forces. These pressures are called
A
bearing stresses
B
fatigue stresses
C
crushing stresses
D
resultant stresses
View Answer
64
The value of shear stress which is induced in the shaft due to the applied couple varies
A
from maximum at the center to zero at the circumference
B
from zero at the center to maximum at the circumference
C
from maximum at the center to mini-mum at the cricumference
D
from minimum at the centro to maxi-mum at the circumference
View Answer
Answer: from zero at the center to maximum at the circumference
65
The torsional rigidity of a shaft is expressed by the
A
maximum torque it can transmit
B
number of cycles it undergoes before failure
C
elastic limit up to which it resists torsion, shear and bending stresses
D
torque required to produce a twist of one radian per unit length of shaft
View Answer
Answer: torque required to produce a twist of one radian per unit length of shaft
66
The safe twisting moment for a compound shaft is equal to the
A
maximum calculated value
B
minimum calculated value
C
mean value
D
extreme value
View Answer
Answer: minimum calculated value
67
Longitudinal stress in a thin cylinder is
A
equal to the hoop stress
B
twice the hoop stress
C
half of the hoop stress
D
one-fourth of hoop stress
View Answer
Answer: half of the hoop stress
68
A cylindrical section having no joint is known as
A
jointless section
B
homogeneous section
C
perfect section
D
seamless section
View Answer
69
A boiler shell 200 cm diameter and plate thickness 1.5 cm is subjected to internal pressure of 1.5 MN/m , then the hoop stress will be
A
30 MN/m2
B
50 MN/m2
C
100 MN/m2
D
200 MN/m2
View Answer
70
The force acting along the circumference will cause stress in the walls in a direction normal to the longitudinal axis of cylinder; this stress is called
A
longitudinal stress
B
hoop stress
C
yeiled stress
D
ultimate stress
View Answer
71
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
A
same
B
double
C
half
D
four times
View Answer
72
The weakest section of a diamond riveting is the section which passes through
A
the first row
B
the second row
C
the central row
D
one rivet hole of the end row
View Answer
Answer: one rivet hole of the end row
73
Rivets are made of following type of material
A
tough
B
hard
C
resilient
D
ductile
View Answer
74
Diamond riveted joint can be adopted in the case of following type of joint
A
butt joint
B
lap joint
C
double riveted lap joints
D
all types of joints
View Answer
75
If the rivets in adjacent rows are staggered and the outermost row has only one rivet, the arrangement of the rivets is called
A
chain riveting
B
zig zag riveting
C
diamond riveting
D
criss-cross riveting
View Answer
76
A riveted joint in which the number otrivets decrease from innermost to outer most row is called
A
chain riveted joint
B
diamond riveted joint
C
criss-cross riveted joint
D
zig-zag riveted joint
View Answer
Answer: diamond riveted joint
77
A riveted joint in which every rivet of a row is opposite to other rivet of the outer row, is known as
A
chain riveted joint
B
diamond riveted joint
C
criss-cross riveted joint
D
zig-zag riveted joint
View Answer
Answer: chain riveted joint
78
When two plates are butt together and riveted with cover plates with two rows of rivets, the joi;it is known as
A
lap point
B
butt joint
C
single riveted single cover butt joint
D
double riveted double cover butt joint
View Answer
Answer: double riveted double cover butt joint
79
Efficiency of a riveted joint is the ratio of its strength (max. load it can resist without failure) to the strength of the unpunched plate in
A
tension
B
compression
C
bearing
D
any one of the above
View Answer
80
In riveted boiler joints, all stresses, shearing, bearing and tensile are based on the
A
size of rivet
B
size of the drilled or reamed hole
C
average of size of rivet and hole
D
smaller of the two
View Answer
Answer: size of the drilled or reamed hole
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