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GATE Prev Year : Machine Design Test-7
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Question 1
The minimum number of teeth on the pinion to operate without interference in standard full height involute teeth gear mechanism with 20 ° pressure angle is
( where Ap=1.457 and G = 1 )
( where Ap=1.457 and G = 1 )
Question 2
Ball bearings are rated by a manufacturer for a life of 106 revolutions. The catalogue rating of a particular bearing is 16 kN. If the design load is 2 kN, the life of the bearing will be p × 106 revolutions, where p is equal to ______
Question 3
A four-wheel vehicle of mass 1000 kg moves uniformly in a straight line with the wheels revolving at 10 rad/s. The wheels are identical, each with a radius of 0.2 m. Then a constant braking torque is applied to all the wheels and the vehicle experiences a uniform deceleration. For the vehicle to stop in 10 s, the braking torque (in N.m) on each wheel is
Question 4
A bar is subjected to fluctuating tensile load from 20 kN to 100 kN. The material has yield strength of 240 MPa and endurance limit in reversed bending is 160 MPa. According to the Soderberg principle, the area of cross-section (in mm2)of the bar for a factor of safety of 2 is
Question 5
On bolting two plates, bolt stiffness becomes twice the clamping material stiffness with initial clamping force of 1500 lbs. What will be the bolt force, if the clamping force reduces to 300 lbs?
Question 6
For the three bolt system shown in the figure, the bolt material has shear yield strength of 200 MPa. For a factor of safety of 2, the minimum metric specification required for the bolt is
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