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 major diameter of a screw thread is also known as core or root diameter.
The property of a material which enables it to be drawn into wires with the application of a tensile force, is called
The helix angle for single helical gears ranges from
In order to withstand resistance to wear, the best profile of gear is
A circular shaft can transmit a torque of 5 kN-m. If the torque is reduced to 4 kN-m, then the maximum value of bending moment that can be applied to the shaft is
The design of pin of a rocker arm of an I.C. engine is based on
For a shaft diameter of 100 mm, the number of bolts in a flange coupling should be
A wood-ruff key is
In a V-belt drive, the belt makes contact at the bottom of the groove of the pulley.
In worm gears, the pressure angle is half the angle between two inclined faces in axial plane.
For crank shaft bearings, the ratio of the length of the journal to its diameter is less than unity.
Lewis equation in gears is used to find the
In order to determine the stresses in a thin cylinder due to an internal pressure, it is assumed that
All stresses produced in a belt are
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
The ratio of driving tensions in V-belt drives is __________ flat belt drives.
A shaft is designed on the basis of rigidity and stiffness.
Which of the following spring is used in mechanical wrist watch?
In helical bevel gearing, the axes of shafts are __________ and the teeth are curved.
Which of the following has threads at both ends?
The ratio of the ultimate stress to the design stress is known as
According to Indian standards, the diameter of rivet hole is made larger than the basic size of rivet by
The cam follower extensively used in air-craft engines is
The minor diameter of a screw thread is also known as outside or nominal diameter.