List of practice Questions

In a closed-loop system, the process to be controlled is an integrating process with a transfer function \( \frac{1}{25} \). The controller proposed to be used is an integral controller with transfer function \( \frac{1}{T4s} \). When a step change in the set point is applied to such a closed system, the controlled variable will exhibit:

Strain gauge rosettes are used when the direction of:

The first-order thermometer used has a time constant of 50 s. If it is subjected to a sinusoidal input cycling at 0.002 Hz, then the time lag produced in the instrument will be:

Routh test cannot be used to test the stability of a control system containing:

A company spends a considerable amount on publicity to promote sales. This expenditure in a break-even chart is shown below the:

Capitalized cost comparison method is used for comparing alternatives having:

A production equipment costs Rs. 2,00,000. Its salvage value is Rs. 20,000. The expected return is Rs. 50,000 per annum. The corporate taxes are taken as 40

An asset is purchased at a cost of Rs. 5000. It has no salvage value at the end of its life of 10 years. Its book value at the end of 5 years using the straight-line method will be:

An additional step in the manufacture of paper from bagasse as compared to that from bamboo is:

Strength of sulphuric acid can be measured by:

XLPE is the trade name of

Bleaching of paper pulp is done by:

The grading of nitrogenous fertilizers is based on:

Higher holdup of solids in the rotary dryer results in:

Sugar is leached from sugar beets with:

In a small column, local efficiency is equal to Murphree efficiency, and in a large column, local efficiency is:

In the absorption of a solute gas from a mixture containing inerts in a solvent, it has been observed that the overall gas transfer coefficient is nearly equal to the individual gas film transfer coefficient. It may therefore be concluded that:

Flash distillation is used at a large scale in:

HETP is numerically equal to HTU only when the operating line:

Heat transfer takes place according to:

When a longitudinal baffle is placed across the shell, the shell-side fluid is forced to pass through the heat exchanger:

For the same process temperatures, the ratio of the LMTD in parallel flow to the LMTD in counter-current flow in a liquid-liquid heat exchanger is always:

For laminar film condensation, what is the ratio of heat transfer to a horizontal tube of large diameter to that of a vertical tube of the same size for the same temperature difference?

The maximum heat loss from a pipe occurs when the critical radius equals: