chemical engineering MCQs – Page 24

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 Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs

461. Titanium is added to molten aluminium alloys before casting for the purpose of_____________________?
0

A. Increasing corrosion resistance

B. Grain refinement

C. Improving fluidity

D. Reducing porosity

462. Direct conversion of thermal energy to electrical energy is facilitated by the____________________?
0

A. Magneto hydrodynamic generator

B. Fuel cells

C. Photo voltaic cell

D. None of these

463. Which of the following is not a principal alloying element for the structural steel ?
0

A. Manganese

B. Chromium

C. Molybdenum

D. Nickel

464. Wrought iron does not have__________________?
0

A. Ability to hold protective coating

B. Uniform strength in all directions

C. High ductility & corrosion resistance

D. Easily weldable characteristics

465. Metalloids________________?
0

A. Are good conductor of heat & electricity

B. Act as electron donors with metals & as electron acceptor with non-metals

C. Are not necessarily solids at room temperature

D. Are compounds that exhibit both metallic & non-metallic properties to some extent and are

E. mplified by elements like germanium, silicon & boron</strong>

466. Which of the following does not discharge the dust collected as a dry solid?
0

A. Electrostatic precipitator

B. Gravity settling chamber

C. Bag filter

D. Wet scrubber

467. Alloys having more than 80% copper are generally more______________________?
0

A. Corrosion resistant

B. Prone to season cracking

C. Machinable

D. Abrasion resistant

468. Diffusion co-efficient of a metal in a solid solution depends upon its ?
0

A. Composition

B. Temperature

C. Both A. & B.

D. Neither A. nor B.

469. Blast furnace slag is mainly molten_________________?
0

A. Iron pyrite

B. Sand

C. Magnesium silicate

D. Calcium silicate

470. Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition of_____________________?
0

A. 70% aluminium oxide & 30% silica

B. 65% tungsten & 35% zirconium

C. 30% nickel, 15% chromium & 55% tungsten

D. 90% tungsten carbide and 10% cobalt

471. ______________________ temperature remains constant during adiabatic saturation process of unsaturated air ?
0

A. Dew point

B. Dry bulb

C. Wet bulb

D. None of these

472. Which of the following is not an explosive ?
0

A. TNT

B. Lead azide

C. CMC

D. RDX

473. The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is___________________?
0

A. Full annealing

B. None of these

C. Patenting

D. Bright annealing

474. Reduction in the grain size reduces the _________________ of the material?
0

A. Creep resistance

B. Fatigue resistance

C. Tensile strength

D. All A, B. & C

475. The transition temperature at which all the ferromagnetic materials become paramagnetic materials is termed as the Curie temperature. Its value for cobalt is ______________ C?
0

A. 768

B. 1127

C. 1480

D. 1359

476. A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material ?
0

A. Brass

B. Glass

C. Steel

D. Rubber

477. M10 index of coke indicates its____________________?
0

A. Abrasion resistance

B. Hardness

C. Compressive strength

D. Impact strength

478. On oscilloscope screen for dynamic measurement, lissajous diagram is normally used to determine the ______________ of the input signal?
0

A. None of these

B. Frequency

C. Amplitude

D. Damping

479. Working of linear variable differential transducer (LVDT) is based on the principle of variable_____________________?
0

A. Capacitance

B. None of these

C. Resistance

D. Mutual inductance

480. Metal shots used in shot blasting are made of ______________________?
0

A. Bronze

B. Stellite

C. Lead

D. Steel

Previous Next

Showing 461 to 480 of 8709 mcqs