Online Chemical Engineering Test - Materials and Construction Test 1

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Total number of questions: 20.
Time allotted: 30 minutes.
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Aluminium as a material of construction suffers from the disadvantage of

very high cost.

rather low tensile strength.

very low strength to weight ratio.

scarce availability.

[#]

The behaviour of visco-elastic material is time dependent. This behaviour is common in __________ materials.

non-crystalline solid

crystalline

rubberry

non-crystalline organic polymeric.

[#]

Cast iron has very high

compressive strength

ductility

shock resistance

resistance to brittleness

[#]

Nitriding of steel is done (in electric furnace) at __________ °C.

510

1720

2210

910

[#]

Silico-manganese steels (containing 0.7% Mn, 0.5% C and 2% Si)

do not require heat treatment for any of its applications.

are used for leaf and coiled springs.

do not have good resilience properties.

is tempered at 850°C.

[#]

Which of the following mechanical properties of a material is most structure insensitive ?

Modulus of elasticity (young's modulus).

Toughness.

Percentage reduction of area.

Tensile strength.

[#]

Hardest material so far found is

diamond

graphite

carborundum

pumice stone

[#]

High resistance electrical heating elements/wire are not made of

marageing steel

nimonic alloys

kanthal wire

nichrome

[#]

The heat treatment process applied to cold formed steel parts is

normalising

tempering

artificial ageing

solution annealing

[#]

10.

The material of construction of pressure mills used for squeezing out the juice from sugar cane is

stainless steel

cast iron

mild steel

monel

[#]

11.

Most common stainless steel type 316, which is highly resistant to corrosion contains

16-13% Cr 10-14% Ni and 2-3% Mo.

20-22% Cr, and 8-10% Ni.

2-4% Cr, 22% NI and 2-4% Mo.

none of these.

[#]

12.

Work hardening of a material

decreases its tensile strength.

decreases its ductility.

increases its ductility.

does not affect its ductility.

[#]

13.

The most commonly used resin for making reinforced plastic is

unsaturated polyester

polypropylene

polyurathane

nylon-6

[#]

14.

Which of the following stainless steels is non-magnetic ?

Ferritic

Martensitic

Austenitic

None of these

[#]

15.

'Hypersil' is a __________ steel.

high speed

silicon

molybdenum

tungsten

[#]

16.

Aluminium alloy is one of the most suitable materials of construction for aircrafts mainly due to its

high strength to weight ratio.

low temperature strength properties.

its ability to be cast, rolled, forged & stamped.

high strength and corrosion & oxidation-resistance at elevated temperature.

[#]

17.

Lead alone is not used in storing equipment, because it

is very costly.

corrodes easily.

is having low creep strength.

none of these.

[#]

18.

Light weight metallic alloy used in aircraft industry is

aluminium

high silicon (14%) iron

duralumin

phosphor bronze

[#]

19.

Which of the following is produced by addition polymerisation ?

Polybutadiene

Phenol formaldehyde

Urea-formaldehyde

Dacron

[#]

20.

German silver is an alloy of copper, nickel and

zinc

silver

tin

lead

[#]

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Online Chemical Engineering Test - Materials and Construction Test 1

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