In block brakes, the ratio of shoe width to wheel diameter is taken between
Which of the following property is desirable in parts subjected to shock and impact loads?
A shaft is subjected to fluctuating loads for which the normal torque (T) and bending moment (M) are 1000 N-m and 500 N-m respectively. If the combined shock and fatigue factor for bending is 1.5 and combined shock and fatigue factor for torsion is 2, then the equivalent twisting moment for the shaft is
Oldham coupling is used to transmit power between two parallel shafts which are slightly offset.
When a machine member is subjected to torsion, the torsional shear stress set up in the member is
Pitch point of a cam 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 screw is specified by its
The velocity factor for ordinary cut gears operating at velocities upto 12.5 m/s is equal to
The wear load should be __________ the dynamic load.
Stress concentration factor is defined as the ratio of
Antifriction bearings are
The property of a bearing material which has the ability to accomodate shaft deflections and bearing inaccuracies by plastic deformation without excessive wear and heating, is known as
In the levers of __________ type, the mechanical advantage is less than one.
A hollow saddle key is
A special case of ductility which permits materials to be rolled or hammered into thin sheets, is called
Crowning on pulley helps
The effect of key ways on a shaft is to reduce its load carrying capacity and to increase its torsional rigidity.
The temperature required for full annealing in hyper-eutectoid steel is
The efficiency of a riveted joint is equal to
Which of the following welded joint is designed for shear strength ?
In designing a connecting rod, it is considered like __________ for buckling about X-axis.
The material commonly used for crane hooks is
The eye bolts are used for
The endurance or fatigue limit is defined as the maximum value of the stress which a polished standard specimen can withstand without failure, for infinite number of cycles, when subjected to