GATE 1988 Mechanical Engineering

The ideal cutting fluid for low speed machining of metals should be one which

Cutting speed in grinding is set to a high value to

A $$0.20$$ $$m$$ diameter pipe $$20$$ $$km$$ long transport oil at a flow rate of $$0.01{m^3}/s.$$ Calculate the power required to maintain the flow if the dynamic viscosity and de...

The contraction allowance provided on the pattern and core boxes compensates for the following type of contraction.

The standard specification of a grinding wheel is $$A-46-M-6-V-21.$$ It means a wheel of

A circular plate $$1$$ $$m$$ in diameter is submerged vertically in water such that its upper edge is $$8m$$ below the free surface of water. The total hydrostatic pressure force o...

In an engineering drawing one finds the designation of $$20G7F8.$$ The position of tolerance of the hole is indicated by

The discharge in $${m^3}/s$$ for laminar flow through a pipe of diameter $$0.04$$ $$m$$ having a centre line velocity of $$1.5$$ $$m/s$$ is:

For the fluid flowing over a flat plate with Prandtle number greater than unity, the thermal boundary layer for laminar forced convection

In twist drills ......... (small/large) point angle and ........ (small/large) helix angle are provided for drilling soft, low strength steel.

A shell and tube heat exchanger is to be designed for heating pressurized water by means of hot gasses which get cooled the data are as follows Temp of water at the inlet $$ = \,80...

For a glass plate transitivity and reflectivity are specified as $$0.86$$ and $$0.08$$ respectively, the absorptivity of the glass plate is

Pure metal pose machinability problem in turning operations. The reason is the

A Newtonian fluid has the following velocity field : $$$\overrightarrow V = {x^2}y\widehat i + 2x{y^2}z\widehat j - y{z^3}\widehat k$$$ The rate of shear deformation $${\varepsilon...

If the load on a ball bearing is reduced to half, the life of the ball bearing will

The parameters which determines the friction factor for turbulent flow in a rough pipe are:

In the design of shafts made of ductile materials subjected to twisting moment and bending moment, the recommended theory of failure is

For full depth of involute spur gears, minimum number of teeth of pinion to avoid interference depends upon

If the length of a column is doubled, the critical load becomes: