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Free download in PDF Machine Design MCQs 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.
101
A tube has the following advantage over pipe
[A]
lighter and easier to handle
[B]
greater shock absorption
[C]
smoother inside walls
[D]
all of the above
102
In order to permit the thermal expansion/contraction of tubing, it should be
[A]
bent
[B]
flared
[C]
crimped
[D]
honed
103
The function of cutting oil when threading a pipe is to
[A]
provide cooling action
[B]
lubricate the dies
[C]
help remove chips
[D]
all of the above
104
Taper on the cotter and slot is provided
[A]
on both the sides
[B]
on one side only
[C]
on none of the sides
[D]
may be provided anywhere
105
The valve rod in a steam engine is connected to an eccentric rod by
[A]
cotter joint
[B]
bolted joint
[C]
kunckle joint
[D]
universal coupling
106
A bench vice has following type of threads
[A]
metric
[B]
square
[C]
buttress
[D]
acme
107
If threads on a bolt are left hand, threads on nut will be
[A]
right hand with same pitch
[B]
left hand with same pitch
[C]
could be left or right hand
[D]
right hand with fine pitch
Answer: left hand with same pitch
108
If d is the normal diameter of a bolt in mm, then the initial tension in kg in a bolt used for making a fluid tight joint as for steam engine cover joint is calculated by the relation
[A]
102 d
[B]
124 d
[C]
138 d
[D]
168 d
109
Eye bolts are used for
[A]
foundation purposes
[B]
locking devices
[C]
transmission of power
[D]
lifting and transportation of machines and cubicles
Answer: lifting and transportation of machines and cubicles
110
Fibrous fracture occurs in
[A]
ductile material
[B]
brittle material
[C]
elastic material
[D]
hard material
111
A tapered key which fits in a keyway in the hub and is flat on the shaft, is known as
[A]
wood-ruff key
[B]
feather key
[C]
flat saddle key
[D]
gib head key
112
A key made from a cylindrical disc having segmental cross-section, is known as
[A]
wood-ruff key
[B]
feather key
[C]
flat saddle key
[D]
gib head key
113
A key capable of tilting in a recess milled out in a shaft is known as
[A]
wood-ruff key
[B]
feather key
[C]
flat saddle key
[D]
gib head key
114
Transverse fillet welded joints are designed for
[A]
tensile strength
[B]
compressive strength
[C]
shear strength
[D]
bending strength
115
Rivets are generally specified by
[A]
thickness of plates to be riveted
[B]
length of rivet
[C]
diameter of head
[D]
nominal diameter
116
Machine screws are
[A]
similar to small size tap bolts except that a greater variety of shapes of heads are available
[B]
slotted for a screw driver and generally used with a nut
[C]
used to prevent relative motion be-tween two parts
[D]
similar to stud
Answer: slotted for a screw driver and generally used with a nut
117
The designation M 33 x 2 of a bolt means
[A]
metric threads of 33 nos in 2 cm.
[B]
metric threads with cross-section of 33 mm
[C]
metric threads of 33 mm outside diameter and 2 mm pitch
[D]
bolt of 33 mm nominal diameter having 2 threads per cm
Answer: metric threads of 33 mm outside diameter and 2 mm pitch
118
A self locking screw has
[A]
fine threads
[B]
coarse threads
[C]
coefficient of friction > tangent of load angle
[D]
hole for inserting split pin
Answer: coefficient of friction > tangent of load angle
119
Set screws are
[A]
similar to small size tap bolts except that a greater variety of shapes of heads are available
[B]
slotted for a screw driver and generally used with a nut
[C]
used to prevent relative motion be-tween parts
[D]
similar to stud
Answer: used to prevent relative motion be-tween parts
120
An alien bolt is
[A]
self locking bolt
[B]
same as stud
[C]
provided with hexagonal depression in head
[D]
used in high speed components
Answer: provided with hexagonal depression in head
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