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4
The endurance or fatigue limit is defined as the maximum value of the stress which a polished standard specimen can withstand without failure, for infinite number of cycles, when subjected to
C. Static as well as dynamic load
D. Completely reversed load
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4
Which of the following formula is used in designing a connecting rod?
C. Johnson's straight line formula
D. Johnson's parabolic formula
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4
For maximum power, the velocity of the belt will be
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4
A spring is used to
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4
An Involute pinion and gear are in mesh. If both have the same size of addendum, then there will be interference between the
A. Tip of the pinion and flank of gear
B. Tip of the gear and flank of pinion
C. Flanks of both gear and pinion
D. Tip of both gear and pinion
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4
According to I.B.R., the factor of safety of riveted joint should not be less than
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4
In helical gears, the right hand helixes on one gear will mesh __________ helixes on the other gear.
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4
Eulers formula for a mild steel column is not valid if the slenderness ratio is
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4
The shock resistance of steel is increased by adding
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Ball bearing type screws are found in following application
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The power transmitted by belt drive depends upon
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The maximum shear stress theory is used for
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4
A type of brake commonly used in motor cars is a
D. Internal expanding brake
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A screw is said to be over hauling screw, if its efficiency is
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4
A transmission shaft includes
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When bevel gears having equal teeth and equal pitch angles connect two shafts whose axes intersect at right angle, then they are known as
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4
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
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4
When carbon in the cast iron is principally in the form of graphite, the cast iron will be of
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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 between two parts
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4
Taper on the cotter and slot is provided
D. May be provided anywhere
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4
In worm gears, the angle between the tangent to the pitch helix and an element of the cylinder, is known as
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4
The ratio of driving tensions in V-belt drives is __________ flat belt drives.
D. cosecα times more than
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4
If an application calls for stresses on screw threads in one direction only, then the following type of thread would be best suited
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In worm gears, the pressure angle is ________ the angle between two inclined faces in axial plane.
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4
For a shaft diameter of 200 mm, the number of bolts in a marine flange coupling should be
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4
The tension on the slack side of the belt is __________ the tension on the tight side of the belt.
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4
The strap end of a connecting rod of steam engine is joined by
B. Sleeve and cotter joint
C. Spigot socket cotter joint
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4
The relation between the pitch of the chain (p) and pitch circle diameter of the sprocket (D) is given by (where T = Number of teeth on the sprocket)
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4
Gear box is used
C. To obtain variable speeds
D. To increase efficiency of system
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A spring of stiffness 1000 N/m is stretched initially by 100 mm from the undeformed position. The work required to stretch it by another 100 mm is