chemical engineering chemical engineering basics MCQs – Page 26

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 Review each marked answer and report any item that may be outdated or unclear.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
501. Latent heat of dry steam at atmospheric pressure is 539 Kcal/kg; which _____________ with increase in the pressure of steam?
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A. Increases

B. Decreases

C. May increase or decrease

D. Remain same

502. Highest cutting speed is achieved by the _______________ tool material ?
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A. High speed steel

B. Plain carbon steel

C. Carbide

D. Cast alloy

503. Specific _________________ is a dimensionless quantity ?
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A. Weight

B. Humidity

C. None of these

D. Heat

504. Titanium is produced by ___________________ of Ti Cl4 ?
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A. Calcium reduction

B. Electrolytic reduction

C. Magnesium reduction

D. Thermal dissociation

505. The critical pressure at which the latent heat of vaporization of steam becomes zero is _____________ Kg/cm2 ?
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A. 100.03

B. 373.15

C. 225.65

D. 273.15

506. Specific gravity of hot metal (pig iron) is ______________ times that of the blast furnace slag ?
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A. 6

B. 0.8

C. 2

D. 3
507. ____________ is the process used for setting up compressive stresses in the surface of a metal to improve its fatigue strength ?
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A. Lancing

B. Slugging

C. Spinning

D. Shot peening
508. At absolute zero temperature, for any reaction involving condensed phases ?
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A. ? H = 0 , ? S = 0

B. ? S = 0 , ? E = 0

C. ? S = 0 , ? Cp = 0

D. ? G = 0 , ? H = 0

509. Mhos scale of hardness, which consists of 10 standard minerals is used for the measurement of _______________ hardness?
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A. Dynamic

B. Rebound

C. Indentation

D. Scratch
510. A solid aluminium ball, when quenched in a water bath maintained at 40C, cools down from 550C to 450C in 20 seconds. The expected temperature of the ball after next 20 seconds may be about ____________________ C?
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A. 300

B. 340

C. 370

D. 320

511. The stress at which extension of the material takes place more rapidly as compared to the increase in load is termed as the _____________ point of the material?
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A. Ultimate

B. Breaking

C. Elastic

D. Yielding
512. While the thermosetting polymers are amorphous in nature, the thermoplastic polymers are either amorphous or crystalline. The crystalline polymers are characterized by the ?
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A. Better finish and surface appearance

B. High flexibility

C. Low impact strength

D. High plastic deformation

513. Steel rods are normally used for concrete reinforcement because concrete and steel have almost equal_________________?
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A. Youngs modulus

B. Thermal co-efficient of expansion

C. Tensile strength

D. Compressive strength

514. Production of one ton of paper in Indian paper industry consumes about ____________ kWh of electricity ?
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A. 2000

B. 300

C. 800

D. 1400
515. Pick out the wrong conversion of absolute & kinematic viscosities ?
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A. 1 m2/sec = 104 stokes

B. 1 N.sec/m2 = 10 paise

C. 1 stoke = 1 cm2/sec

D. 1 stoke = 1 m2/sec
516. Pick out the wrong statement?
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A. Copper is the metal having the highest electronic conductivity

B. Hardenability & Weldability of metals are inversely related

C. Covalent bonding formed by sharing of electrons is present in all semi-conductor materials

D. Glass transition temperature applies to polymers but not to glasses

517. High endurance limit of carburised machine parts is because of the fact that carburisation __________________?
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A. Produces a better surface finish

B. Suppresses any stress concentration produced in the parts

C. Introduces a compressive layer on the surface

D. Enhances the yield point of the material

518. Gross national product (GNP) means the total value of _______________ in a country ?
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A. Goods produced

B. Taxes paid

C. Earning of the citizens

D. Gold reserve

519. What happens, when SO2 is passed through a solution of H2S in water ?
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A. Oleum is formed

B. H2SO3 is formed

C. None of these

D. Precipitation of sulphur takes place
520. Pick out the wrong statement?
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A. In line and staff organisation, line executes and staff directs

B. Line organisation is net suitable for expansion and growth of an industry

C. Complete unity of command exists in a line organisation

D. None of these