chemical engineering chemical engineering basics MCQs – Page 36

Practise multiple-choice questions from chemical engineering chemical engineering basics for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering chemical engineering basics Mcqs
701. Natural water contains approximately ______________ percent of heavy water?
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A. 1.2

B. 0.71

C. 0.015

D. 3.5

702. Cassiterite is an ore of_________________?
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A. Tin

B. Chromium

C. Lead

D. Molybdenum

703. Normalising of a casting does not__________________?
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A. Reduce segregation

B. Refine its grain structure

C. Improve its mechanical properties

D. Induce stresses in it
704. Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode________________?
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A. Is much cheaper than the cathodic base material to be guarded against corrosion

B. All A, B. & C.

C. Is exemplified by magnesium plate

D. Occurs higher in the electro-chemical series of metals

705. Dryness fraction of dry steam is_________________?
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A. 0

B. 0.5

C. ?

D. 1
706. Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal & A = its surface area; in the casting) ?
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A. V2/A

B. V/A

C. V/A2

D. V2/A2
707. Which of the following if present in iron ore, enhances its value ?
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A. Alkali oxide

B. Alumina

C. Lime & Magnesia

D. None of these

708. Which of the following material handling equipments is not suitable for moving materials in varying paths ?
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A. Truck

B. Belt conveyor

C. Crane

D. Hand trolley

709. When dry bulb temperature & wet bulb temperature of moist air is the same, it means that the _________________?
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A. Partial pressure of water vapour is less than the total pressure

B. Humidity is < 100% & dew point temperature of air has not reached

C. Dew point temperature of air has not reached & air is not saturated fully

D. Air is fully saturated
710. In a counter flow heat exchanger, hot fluid enters at 170C & leaves at 150C, while the cold fluid enters at 50C & leaves at 70C. The arithmetic mean temperature difference in this case is ______________ C?
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A. 120

B. 20

C. 60

D. ?
711. For an ideal gas, Cp Cv is____________________?
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A. (3/2) R

B. 0

C. R

D. -R

712. Yield strength of a polycrystalline metal with an average grain size d, is proportional to ____________________?
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A. d-1

B. d

C. d-1/2

D. d1/2

713. Which of the following are considered applications of ultrasonic testing ?
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A. Measurement of material thickness

B. None of the above

C. Determination of elastic constant

D. Detection of defects in metal
714. The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume : Cp of copper is 23 J K-1mole-1) ?
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A. 4600 J

B. 230 J

C. 2.3 106 J

D. 2300 J
715. Which of the following relationships is correct for relating the three elastic constants of an isotropic elastic material (where, E = Youngs modulus, G = Modulus of rigidity or shear modulus v = Poissons ratio) ?
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A. E = G (1 + v)

B. E = 2G (1 + 2v)

C. E = G (1 + v)/2

D. E = 2G (1 + v)
716. Liquor poisoning generally occurs due to the presence of _______________ in it?
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A. Ethyl alcohol

B. Carbonic acid

C. Impurities

D. Methyl alcohol
717. Constituents of stellite are ____________________?
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A. Zinc, aluminium & nickel

B. Cobalt, chromium & tungsten

C. Nickel, cobalt & vanadium

D. Zinc, copper & nickel

718. In case of a, centrifugal pump, the ratio h1/h2 is termed as the _____________ efficiency (where, h1 = actual measured head & h2 = head imparted to the fluid by impeller)?
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A. Impeller

B. Volumetric

C. Mechanical

D. Overall

719. A material being tested for endurance strength is subjected to the _____________ load?
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A. Impact

B. Static & dynamic

C. Completely reversed

D. Dynamic

720. LVDT used for displacement measurement is a/an _______________ Transducer?
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A. Passive

B. Capacitive

C. Active

D. None of these