A flange coupling is used to connect two shafts
The stress which vary from a minimum value to a maximum value of the same nature (i.e. tensile or compressive) is called
A screw is said to be a self locking screw, if its efficiency is
The material generally used for air-craft components is
The longitudinal joint in boilers is used to get the required
The cam follower generally used in automobile engines is
In a belt drive, if the pulley diameter is doubled keeping the tension and belt width constant, then it will be necessary to
Which of the following statement is correct ?
The shock absorbing capacity of a bolt may be increased by
In the assembly of pulley, key and shaft
In a turnbuckle, if one of the rods has left hand threads, then the other rod will have
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.
A riveted joint is a __________ fastening.
The algebraic difference between the maximum limit and the basic size is called
When the material of key and shaft is same, and the width of key is one-fourth of the diameter of shaft (d), then length of key will be
The coefficient of friction between the belt and pulley depends upon the
An aluminium member is designed on the basis of
The springs mostly used in machinery have spring index less than 3.
The speed of the sprocket reduces as the chain pitch __________ for a given number of teeth.
The Lewis equation for gear tooth with involute profile predicts the static load capacity of cantilever beam of uniform strength.
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
Which of the following statement is wrong ?
The most important dimension in the design of a nut is
The power transmitted by a belt drive is maximum when the maximum tension in the belt is __________ the centrifugal tension.
A lap joint is always in single shear.
The dynamic tooth load is due to
According to I.B.R., the thickness of the boiler shell should not be less than
When the shaft rotates in anticlockwise direction at high speed in a bearing, it will
When an open coiled helical compression spring is subjected to an axial compressive load, the stress induced in the wire is
The pressure angle for involute gears depends upon the size of teeth.
When a belt drive is transmitting maximum power,
The allowable static stress for steel gears is approximately __________ of the ultimate tensile stress.
A plate with a circular hole in the centre is subjected to a pull of P. The maximum stress induced at the edge of the hole is three times of the nominal stress.
When a cylinder is subjected to a very high internal fluid pressure, the thin cylinder should be used.
According to I.B.R., the distance between the rows of rivets, for equal number of rivets in more than one row for lap joint or butt joint (chain riveting) shall not be less than
In an oil lubricated journal bearing, the coefficient of friction between the journal and the bearing
A basic shaft is one whose
The malleable material should be plastic but is not essential to be so strong.
The draw of cotter should not be more than
Factor of safety for fatigue loading is the ratio of
The largest diameter of an external or internal screw thread is known as
If b denotes the face width and L denotes the cone distance for a bevel gear, then the bevel factor is written as
The pitch diameter is the __________ diameter of an external or internal screw thread.
The cold working of metals is carried out __________ the recrystallisation temperature.
In a full journal bearing, the angle of contact of the bearing with the journal is
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