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BARC OCES 2022 Quiz 9

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Question 1

A cylinder of diameter 100 mm and height 50 mm is melted and casted into a sphere of uniform density. If the melting time takes 1 min, diameter of sprue base is 5 mm and height of pouring basin is 20 mm, solidification for conversion of factor is 0.97 × 106 s/m2, the total time for conversion of solid cylinder to solid sphere will be ____ s.
[Neglect any time losses]

Question 2

If   , where x > 0 then is

Question 3

Mach number is significant in

Question 4

A 2-D flow field is defined as Description: Description: E:\Gate\SSC JE Mechanical Part 1\Made Easy Questions\07_Fluid-Mechanics_BLok_files\image012.png. The equation of steamline passing through the point (1,1) is

Question 5

Mohr’s circle for the state of stress defined by MP is a circle with

Question 6

Given , what will be the evaluation of the definite integral

Question 7

One kg mass of iron at 1200 K is allowed to cool to 400 K and environment is at 300 K. The specific heat of steel is 0.5 kJ/kg. K. The Irreversibility is

Question 8

Two helical spur gear are in mesh with angular velocity 200 rpm for gear and 600 rpm for the pinion. Assuming no slip occur between the meshing gears. What will be the value of gear ratio for the following gear arrangement.

Question 9

A four bar mechanism PQRS having PQ = 20 mm, QR = 40 mm, RS = 30 mm, SP = 55 mm. If PQ is fixed, then which type of mechanism formed?

Question 10

The life of a ball bearing at a load of 10 KN is 8000 hours. Ifthe load is increased to 20 KN, keeping all other conditions the same, then its life in hours is
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