Category: Chemical Engineering Basics

A. (r2 – r1)/r1. r2
B. r1. r2/(r2 – r1)
C. (r2 + r1)/r1. r2
D. r1. r2/(r2 + r1)

A. Hard
B. Soft
C. Silicon carbide
D. Aluminium oxide

A. Lead
B. Zinc
C. Aluminium
D. Copper

A. Reduced chance of gas porosity
B. Greater dimensional stability of the casting
C. Uniform flow of molten metal into the mould cavity
D. Less sand expansion type of casting defect

A. Guard the boiler in case of abnormal rise in steam pressure
B. Drain out water and sludge during its repair
C. Regulate the supply of water in boiler
D. Put out the fire in the furnace when the water level in the boiler falls to unsafe limit

A. Pewter
B. White
C. Babbitt
D. Gun

A. Whose oxide/ore is not reduced by carbon
B. Which fall in the category of alkali & alkaline earth metals
C. Which stands higher in the electrochemical series of the metal
D. All A, B. & C.

A. 100% indirect reduction
B. 100% direct reduction
C. 50-60% indirect reduction
D. 30-40% indirect reduction

A. Determination of elastic constant
B. Detection of defects in metal
C. Measurement of material thickness
D. None of the above

A. Forging
B. Shell moulding
C. Investment casting
D. Pressure die casting