When a bolt is subjected to shock loading, the resilience of the bolt should be considered in order to prevent breakage at the
A column is known as a long column if the slenderness ratio is
The toughness of a material __________ when it is heated.
A locking device in which the bottom cylindrical portion is recessed to receive the tip of the locking set screw, is called
The square threads are not so strong as V-threads but they offer less frictional resistance to motion than Whitworth threads.
Two shafts A and B under pure torsion are of identical length and identical weight and are made of the same material. The shaft A is solid and the shaft B is hollow. We can say that
Soderberg relation is based on __________ of the material whereas all other failure relation for dynamic loading are based on ultimate strength of the material.
Which of the following statement is correct for gears?
According to Guest's theory, the failure occurs at a point in a member when the maximum shear stress in a bi-axial stress system reaches the shear stress at elastic limit in simple tension test.
In order to obtain the bolts of uniform strength, an axial hole is drilled through the head as far as the threaded portion such that the area of shank becomes equal to the root area of the thread.
In a crossed belt drive, the shafts are arranged parallel and rotate in the same directions.
The rolling contact bearings as compared to sliding contact bearings have
The metal suitable for bearings subjected to light loads is
Circumferential joint in boilers is used to get the required length of a boiler.
The number of slots in amm castle nut is
Slenderness ratio is the ratio of
A shaft is subjected to a maximum bending stress ofN/mm2 and maximum shearing stress equal toN/mm2 at a particular section. If the yield point in tension of the material isN/mm2 and the maximum shear stress theory of failure is used, then the factor of safety obtained will be
According to Unwin's formula, the relation between the diameter of rivet hole (d) and the thickness of plate (t) is given by (where d and t are in mm)
In a flange coupling, the flanges are coupled together by means of
A flanged pipe joint will be a leak-proof joint, if the circumferential pitch of the bolts is (where d = Diameter of bolt hole)
An open belt drive is used when
In worm gears, the angle between the tangent to the pitch helix and an element of the cylinder, is known as
The maximum normal stress theory is used for
The difference between the tooth space and the tooth thickness as measured on the pitch circle, is called
A connecting rod subjected to an axial load may buckle in the plane perpendicular to the plane of motion of the connecting rod.
A steel containing more than 0.carbon is known as eutectoid steel.
The ball bearings are provided with a cage
A screw is said to be over hauling screw, if its efficiency is
A crankshaft is a __________ shaft.
The longitudinal stress is __________ of the circumferential stress.
In order to avoid tearing of the plate at an edge, the distance from the centre line of the rivet hole to the nearest edge of the plate should be equal to (where d = Diameter of rivet hole)
Which of the following statement is wrong ?
A transmission shaft includes
Stress concentration is caused due to
Surface endurance limit of gear material is dependent upon its
In unilateral system of tolerance, the tolerance is allowed on
Idler pulley is used for
When two non-intersecting and non-coplaner shafts are connected by gears, the arrangement is known as
Screws jacks have multiple threads.
When a load W is suddenly applied to a bar of weight W1, the stress induced in the bar will increase with the increase in weight W1.
The elasticity is the property of a material which enables it to
The contact ratio is the ratio of
Which one of the following is a positive drive?
Which of the following is an antifriction bearing?
In leaf springs, the longest leaf is known as
In helical gears, the right hand helixes on one gear will mesh __________ helixes on the other gear.
When screw threads are to be used in a situation where power is being transmitted in one direction only, then the screw threads suitable for this will be
The application of third type levers is found in
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