Correct answer
A. 1
Explanation
The correct answer is 1.
Thermal efficiency of blast furnace stoves used for heating blast (air) may be about ________ percent?
With increasing alumina content, the fusion point of high alumina refractories________?
Gradually varied flow in open channel is a/an ________ flow?
To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of________?
In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed?
Hydraulic intensifier is used for increasing the ________?