Chemical Engineering MCQs [Quiz 27]

Q1. To improve the machinability of steel, it is generally subjected to
(A) Spheroidising
(B) Tempering
(C) Normalising
(D) Annealing

Q2. Difference at any instant between the value of the controlled variable and the set point is called the
(A) Deviation
(B) Derivative time
(C) Error ratio
(D) Differential gap

Q3. Dephosphorization of molten pig iron is favoured by
(A) Oxidising and basic slag
(B) Reducing and basic slag
(C) High activity co-efficient of phosphorous in metal
(D) Oxidising and neutral slag

Q4. Cementite is in the lamellar form in the __________ phase of steel.
(A) Martenistic
(B) Bainitic
(C) Pearlitic
(D) Ferritic

Q5. Inertial forces are obtained, when the elastic forces are multiplied by __________ number.
(A) Mach
(B) Froude
(C) Reynolds
(D) Euler

Q6. Brazing is the joining of metals
(A) Without melting the base metal
(B) With a non-ferrous filler
(C) Both (A) & (B)
(D) Neither (A) nor (B)

Q7. Metal shots used in shot blasting are made of
(A) Stellite
(B) Steel
(C) Bronze
(D) Lead

Q8. Midrex process of sponge iron production uses reformed natural gas as the reducing agent, which uses iron ore in the form of
(A) Lumps
(B) Pellets
(C) Briquettes
(D) Sinter

Q9. Circular cross section machine parts which are symmetrical about the axis of rotation are made by hot
(A) Piercing
(B) Spinning
(C) Drawing
(D) Extrusion

Q10. Specific gravity of a metal, which weighs 5 kg in air and 4 kg when submerged in water, will be
(A) 5
(B) 1.25
(C) 2.5
(D) 3.75

Updated: 26th July 2019 — 8:41 PM

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