The ratio of driving tensions in V-belt drives is __________ flat belt drives.
The yield point in static loading is __________ as compared to fatigue loading.
Wahl's stress factor __________ very rapidly as the spring index decreases.
An universal coupling is used to connect two shafts
A shoe brake is commonly used in railway trains.
The dedendum circle diameter is equal to (where φ = Pressure angle)
When the shaft rotates in anticlockwise direction at slow speed in a bearing, it will
A steel containing __________ 0.carbon is known as hypo-eutectoid steel.
Which of the following statement is wrong?
According to I.B.R., the efficiency of a triple riveted butt joint with double straps of unequal width (5 rivets per pitch length) should be
The rolling contact bearings are known as
If a bearing is designated by the numberit means that the bearing is of
The major diameter of a screw thread is also known as core or root diameter.
All stresses produced in a belt are
According to Rankine's theory, the failure occurs at a point in a member
When a material is subjected to fatigue loading, the ratio of the endurance limit to the ultimate tensile strength is
The resilience of a bolt may be increased by
In worm, gears, pitch lead angle is
When two parallel and coplaner shafts are connected by gears having teeth parallel to the axis of the shaft, the arrangement is known as spiral gearing.
A wood-ruff key is
A sliding bearing in which the working surfaces are completely separated from each other by lubricant is called zero film bearing.
A basic hole is one whose
According to Indian standards, the diameter of rivet hole is made larger than the basic size of rivet by
A shaft is designed on the basis of rigidity and stiffness.
For circumferential joint in boilers, the type of joint used is
A taper key which fits half in the key way of the hub and half in the key way of shaft, is known as
If a shaft made from ductile material is subjected to combined bending and twisting moment, calculations based on which one of the following failure theories will give the most conservative value?
When two non-parallel or intersecting but coplaner shafts are connected by gears, the arrangement is known as bevel gearing.
The backlash for spur gears depends upon
Tapered roller bearings can take
The initial tension (in newtons) in a bolt used for making a fluid tight joint like steam engine cover joints, is calculated by the relation (where d = Nominal diameter of bolt in mm)
The dedendum is the radial distance from the
The lead angle of a worm is 22.5°. Its helix angle will be
A screw is specified by its
In a V-belt drive, the belt makes contact at the bottom of the groove of the pulley.
Screws used for power transmission should have
In a flange coupling, the keys are staggered at __________ along the circumference of the shafts in order to divide the weakening effect caused by key ways.
The cam follower extensively used in air-craft engines is
Which of the following spring is used in mechanical wrist watch?
In cyclic loading, stress concentration is more serious in
The size of a gear is usually specified by
In order to remove internal stresses produced by hardening the steel, the process usually adopted is
The property of a material which enables it to be drawn into wires with the application of a tensile force, is called
In a steam engine, the valve rod is connected to an eccentric rod by means of
The root angle of a bevel gear is equal to
The wear load should be __________ the dynamic load.
The number of rivets in shear shall be equal to the number of rivets in crushing.
The minor diameter of a screw thread is also known as outside or nominal diameter.
In helical bevel gearing, the axes of shafts are __________ and the teeth are curved.
For a square key made of mild steel, the shear and crushing strength are related as