List of top Questions asked in TS PGECET- 2026

In a gyratory crusher, the size reduction is effected primarily by

If the frequency of the stirrer in a mixing tank is increased by a factor of 2 while all other parameters are kept constant, by what factor is the power requirement increased at high Reynolds number?

Crushing efficiency is the ratio of

In a fertilizer plant, in which of the following equipment, molten ammonium nitrate is mixed with ground lime-stone

In continuous filtration (at a constant pressure drop), filtrate flow rate varies inversely as

Which one of the following is valid for a laminar flow of filtrate through a cake deposited on septum?

For continuous reverse air cleaning in a fabric filter, gas-to-fabric ratio normally varies from

A rotameter

Weber number is the ratio of

Sorting classifier uses a sink-and-float method to separate particles based on the

During size reduction, the optimum speed of ball mill must be

When the water flows over a rectangular suppressed weir, the pressure beneath the nappe is

The velocity distribution in the turbulent boundary layer follows

For a centrifugal pump with a specific impeller diameter, operating at a fixed speed and handling a fluid of constant density

Fluids which show an apparent increase in viscosity with time are called

Cavitation can be prevented by

The thermal efficiency of a reversible heat engine operating between two given thermal reservoirs is $0.4$. The device is used either as a refrigerator or as a heat pump between the same reservoirs. Then the coefficient of performance as a refrigerator $(\text{COP})_\text{R}$ and the coefficient of performance as a heat pump $(\text{COP})_\text{HP}$ are:

High pressure steam is expanded adiabatically and reversibly through a well-insulated turbine which produces some shaft work. If the enthalpy change and entropy change across the turbine are represented by $\Delta H$ and $\Delta S$ respectively for this process, then:

Generalized compressibility factor chart is a plot of:

For a fully turbulent flow ($\text{Re} > 10^5$) in a pipe of diameter $d$, with a constant pressure gradient, the volumetric flow rate ($Q$) of an incompressible fluid varies with the diameter as:

Applying a pressure drop across a capillary results in a volumetric flow rate ‘Q' under laminar flow conditions. The flow rate, for the same pressure drop, in a capillary of the same length but half the radius is:

For an ideal fluid flow the Reynolds number is

Which one of the following does not change during a phase change such as melting, vaporization and sublimation?

Clapeyron equation deals with:

Ideal refrigeration cycle is: