chemical engineering MCQs – Page 349

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 Review each marked answer and report any item that may be outdated or unclear.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
6961. Visco-elastic behaviour of materials which is time dependent is common in______________?
comments icon0
A. Non-crystalline organic polymer

B. Non-crystalline solids

C. Crystalline solid

D. Plastics

6962. Ferric stainless steels compared to austenitic stainless steels________________?
comments icon0

A. Are less ductile and hence less suitable for cold pressing

B. Have lower corrosion resistance

C. All A., B. and C.

D. Are harder to fabricate

6963. Which of the following produces maximum pressure difference for transportation of gases ?
comments icon0

A. Vacuum pumps

B. Compressors

C. Blowers

D. Fans

6964. Maximum carbon content in any variety of steel can be upto 1.3%. Steel containing 0.4% Carbon is not used for making___________________?
comments icon0
A. Chisels

B. Bolts

C. Studs

D. Nuts

6965. Corrosion resisting properties of cast iron are significantly improved by the addition of 12 15% of___________________?
comments icon0

A. All A., B. & C.

B. Tungsten

C. Silicon

D. Vanadium

6966. Caustic soda is transported in _____________ lined containers ?
comments icon0

A. Glass

B. Nickel

C. Neoprene

D. Either B. or C.
6967. White cast iron as compared to grey cast iron is ________________?
comments icon0

A. Very brittle

B. Very hard

C. All A., B. & C.

D. More durable

6968. The maximum head that can be developed by a single impeller is _____________ ft?
comments icon0

A. 1000

B. 25

C. 250-300

D. 100

6969. Vycor, a widely used material for making thermal wells in temperature measurement, is a_______________?
comments icon0

A. Metallic alloy

B. Glass

C. Thermosetting plastic

D. Cermet

6970. A Newtonian liquid (? = density, ? = viscosity) is flowing with velocity v? in a tube of diameter D. Let ?p be the pressure drop across the length L. For a laminar flow, ?p is proportional to_________________?
comments icon0

A. L?V/D2

B. D?v2/L

C. L?v2/D

D. ?V/L

6971. Silicon percentage in iron castings to have maximum hardness should be about__________________?
comments icon0
A. 0.8

B. 2.5

C. 0.3

D. 0.5

6972. _____________ of a material results, when its strength is increased & ductility is decreased by heating at a relatively lower temperature after cold working?
comments icon0

A. Twinning

B. Solid solution hardening

C. Strain ageing

D. Screw dislocation

6973. For flow past a flat plate, if x? is the distance along the plate in the direction of flow, the boundary layer thickness is proportional to________________?
comments icon0

A. x

B. 1/x

C. 1/?x

D. ?x
6974. Hydrochloric acid is stored in a ________________vessel?
comments icon0
A. Rubber lined steel

B. Lead lined steel

C. Stainless steel

D. Cast iron

6975. Stainless steel contains_________________?
comments icon0
A. Chromium and nickel

B. Vanadium

C. Aluminium

D. Copper

6976. Brine solution is stored/treated in _______________ lined vessels/pipes?
comments icon0

A. Rubber

B. Glass

C. Lead

D. Nickel
6977. Specific speed for a centrifugal pump is___________________?
comments icon0
A. N ?Q/H3/4

B. N ?Q/H2/3

C. N3D5/H1/3

D. N ?Q/H

6978. Nickel as a material of construction__________________?
comments icon0
A. Is used as an alloying element for both ferrous & non-ferrous alloys

B. Is paramagnetic below 415 C (its Curie temperature)

C. Diamagnetic

D. Has a body centred cubic (bcc) crystal lattice structure

6979. Most of the common metals have ______________ crystal structure?
comments icon0

A. Hexagonal

B. Orthorhombic

C. None of these

D. Cubic
6980. Bush bearings are made of______________________?
comments icon0

A. Mild steel

B. White metal alloys

C. None of these

D. Phosphorous bronze