BARC OCES 2022 Quiz 17

Select the best options from below, which correctly matches the ‘Operating mode of SI engine’ (List A) with the ‘Desired A/F ratio’ (List B):

If young’s modulus of elasticity of a material is 140 GPa and Bulk modulus is 70 GPa, what will be the Poisson’s ratio (μ)?

For long column of length L, what will be the ratio of

where,

P₁ = Euler’s buckling load, when both ends are hinged.

P₂ = Euler’s buckling load, when both ends are fixed.

Which of the statements given below is/are correct ?
(1) Pressure angle is defined as the angle between the direction of follower movement & the normal to the base curve at any point.
(2) In case of radial translating roller follower, parabolic motion of the follower is very appropriate for high speed cams.

For the cantilever beam shown below, calculate the maximum shear stress developed:

Calculate the bearing life , if rating life for  bearings is 9000h and shaft is rotating at 1500rpm.

Which of the following is incorrect with respect to increase in condenser pressure?

During a rolling process, a sheet of  thick is rolled down to  thickness. If the roll of diameter rotates at , calculate the velocity of strip  at the neutral point.