Q.1
A bolt of M 24 × 2 means that
Q.2
The following type of nut is used with alien bolt
Q.3
According to I.B.R., when the thickness of boiler shell (t) is greater than 8 mm, then the diameter of rivet hole (d) is obtained by
Q.4
According to I.B.R., when the thickness of the boiler shell (t) is less than 8 mm, then the diameter of the rivet hole (d) is obtained by
Q.5
Shaft coupling is used in machinery to
Q.6
The stress induced in the belt is,
Q.7
A connecting rod subjected to an axial load may buckle with
Q.8
Wire ropes as compared to cotton ropes
Q.9
In the calculation of induced shear stress in helical springs, the Wahl's stress factor is used to take care of
Q.10
Which of the following statement is correct, for two shafts connected in parallel?
Q.11
The value of stress concentration factor depends upon
Q.12
A hollow saddle key is
Q.13
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
Q.14
Cold working
Q.15
A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is τ. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be
Q.16
The shock resistance of steel is increased by adding
Q.17
While designing a screw in a screw jack against buckling failure, the end conditions for the screw are taken as
Q.18
At low temperatures (say 75°C) the notched bar impact value of steel
Q.19
Cap screws are
Q.20
All stresses produced in a belt are
Q.21
The included angle for the British Association thread is
Q.22
The difference between the tooth space and the tooth thickness as measured on the pitch circle, is called
Q.23
In nitrated parts, the origins of the fatigue cracks will occur at
Q.24
The process extensively used for making bolts and nuts is
Q.25
In a marine flange coupling, the pitch circle diameter of bolts is taken as
Q.26
A sliding bearing in which although lubricant is present, the working surfaces __________ contact each other at least part of the time, is called boundary lubricated bearing.
Q.27
In a steam engine, the valve rod is connected to an eccentric rod by means of
Q.28
An elastic bar is fixed at the upper end and loaded at the lower end by a falling weight. The shock load produced can be reduced by
Q.29
Basic hole is one
Q.30
Tapered roller bearings can take
Q.31
The power transmitted by means of a belt depends upon
Q.32
In a multiple V-belt drive, if one of the belts break, then
Q.33
The resultant axial load on a bolt depends upon
Q.34
In most machine members, the damping capacity of the material should be
Q.35
Which of the following bearing is preferred for oscillating conditions?
Q.36
The contact ratio for gears is
Q.37
Which of the following material has the maximum ductility?
Q.38
In radial bearings, the load acts __________ to the axis of rotation.
Q.39
Basic shaft is one
Q.40
Which of the following statement is wrong?
Q.41
Which of the following statement is wrong?
Q.42
Which of the following statement is wrong?
Q.43
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
Q.44
A steel containing up to 0.15% carbon is known as
Q.45
Which of the following statement is wrong?
Q.46
A steel containing 0.8% carbon is known as
Q.47
The rocker arms in internal combustion engines are of__________.
Q.48
Gears are casted by
Q.49
Which of the following is an anti-friction bearing?
Q.50
The anti-friction bearings
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