A. Partial condensation of steam
B. Vibration of the pipeline
C. High degree of superheat of steam
D. Its exposure to torrential rain
✅ The correct answer is option A.
Basic Chemical Engineering MCQs
Which of the following materials has the maximum shrinkage allowance ?
A. Brass
B. Cast iron
C. Lead
D. Aluminium alloy
✅ The correct answer is option C.
Which of the following contains the least percentage of carbon ?
A. Pig iron
B. Wrought iron
C. Cast iron
D. Malleable iron
✅ The correct answer is option B.
Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure.
A. Hexagonal close, packed (hcp)
B. Face centred cubic (fcc)
C. Body centred cubic (bcc)
D. Simple cubic
✅ The correct answer is option D.
Wave length of X-rays is about 1 angstron, however it can not pass through a sheet of
A. Paper
B. Cloth
C. Lead
D. Aluminium
✅ The correct answer is option C.
Material of construction of surveying metallic tapes is __________ which has low coefficient of expansion & enough strength.
A. Constantan
B. Invar
C. Pewter metal
D. Monel metal
✅ The correct answer is option B.
The best criterion for analysing an economic investment is the
A. Rate of return criterion
B. Present value method
C. Salvage value
D. Future value method
✅ The correct answer is option A.
Other parameters remaining same, the recrystallisation temperature of an alloy is lowered, when
A. Strain rate is increased
B. Grain size is increased
C. Prior cold deformation is increased
D. Not affected by any of the above parameters
✅ The correct answer is option A.
To counteract the bad effects of strain hardening on a cold formed part, it must be
A. Tempered
B. Normalised
C. Annealed
D. Hardened
✅ The correct answer is option C.
For infinite parallel planes having emis-sivities ε₁ & ε₂, the interchange factor for radiation from surface 1 to surface 2 is given by
A. (ε₁ + ε₂)/ε₁.ε₂
B. Ε₁.ε₂/(ε₁ + ε₂ – ε₁.ε₂)
C. Ε₁.ε₂
D. Ε₁ + ε₂
✅ The correct answer is option B.