A. H₂
B. CCl₄
C. C₂H₂
D. S
✅ The correct answer is option B.
Basic Chemical Engineering MCQs
In connection with corrosion of metals, passivation is the process that
A. Intensifies deterioration
B. Changes the composition of the metal
C. Inhibits further deterioration
D. None of these
✅ The correct answer is option C.
Softening of hardned steel is done by its
A. Normalising
B. Tempering
C. Annealing
D. Carburising
✅ The correct answer is option A.
Hypo (sodium thiosulphate) because of its complex forming behaviour is used in photography to remove undecomposed silver bromide as a soluble complex for __________ of the picture.
A. Printing
B. Developing
C. Colour
D. Fixation
✅ The correct answer is option B.
The type of pump used for lifting large quantity of sewage is a __________ pump.
A. Gear
B. Centrifugal
C. Reciprocating
D. Plunger
✅ The correct answer is option B.
For the same heat input & compression ratio, efficiency of Otto cycle is higher than that of diesel cycle, because in Otto cycle.
A. Heat rejection is lower
B. Expansion & compression are isentropic
C. Maximum temperature is higher
D. Combustion is at constant volume
✅ The correct answer is option A.
Largest application of laser welding is in __________ welding.
A. Microspot
B. Under water
C. Precious metals
D. Heavy structure
✅ The correct answer is option A.
The taper provided on pattern for its easy & clean withdrawal from the mould is termed as the __________ allowance.
A. Casting
B. Pattern
C. Draft
D. Distoration
✅ The correct answer is option C.
Wood is a/an __________ material.
A. Amorphous
B. Cellular
C. Homogeneous
D. Grannular
✅ The correct answer is option B.
At the point of boundary layer separation in fluid flow, the
A. Shear stress is maximum
B. Velocity gradient is flat
C. Density variation is maximum
D. Shear stress is zero
✅ The correct answer is option A.