Materials & Construction Mcqs for Chemical - Set 14

1)   Duriron is__________________?

a. Acid resistant, brittle and very hard
b. High silicon iron
c. Prone to breakage due to thermal expansion because of its very high co-efficient of thermal expansion
d. All A., B. and C.
Answer  Explanation 

ANSWER: All A., B. and C.

Explanation:
No explanation is available for this question!


2)   The material of construction of bearings is__________________?

a. Cast iron
b. Babbitt metal
c. Pig iron
d. Steel
Answer  Explanation 

ANSWER: Babbitt metal

Explanation:
No explanation is available for this question!


3)   Very high sulphur in pig iron makes ___________________?

a. Its casting unsound
b. Its hard and machinable
c. Its brittle and malleable
d. All A., B. & C.
Answer  Explanation 

ANSWER: Its casting unsound

Explanation:
No explanation is available for this question!


4)   White cast iron as compared to grey cast iron is ________________?

a. More durable
b. Very brittle
c. Very hard
d. All A., B. & C.
Answer  Explanation 

ANSWER: All A., B. & C.

Explanation:
No explanation is available for this question!


5)   Brine solution is stored/treated in _______________ lined vessels/pipes?

a. Rubber
b. Lead
c. Glass
d. Nickel
Answer  Explanation 

ANSWER: Nickel

Explanation:
No explanation is available for this question!


6)   Compressive strength of wood is usually more along the grains. The tenile strength of wood as compared to that of steel is about_______________?

a. Half
b. One third
c. One fifth
d. One twelfth
Answer  Explanation 

ANSWER: One fifth

Explanation:
No explanation is available for this question!


7)   Which of the following has a very high carbide forming tendency in steels ?

a. Silicon
b. Chromium
c. Nickel
d. Vanadium
Answer  Explanation 

ANSWER: Vanadium

Explanation:
No explanation is available for this question!


8)   Which of the following alloy steels has the energy saving properties making it suitable for use in electrical machines ?

a. Silicon steel
b. Chromium steel
c. Molybdenum steel
d. None of these
Answer  Explanation 

ANSWER: Silicon steel

Explanation:
No explanation is available for this question!


9)   Silicon percentage in iron castings to have maximum hardness should be about__________________?

a. 0.3
b. 0.5
c. 0.8
d. 2.5
Answer  Explanation 

ANSWER: 0.8

Explanation:
No explanation is available for this question!


10)   The electrical conductivity of a ______________ decreases with rise in temperature?

a. Metal/alloy
b. Semi-conductor
c. Dielectric
d. None of these
Answer  Explanation 

ANSWER: Metal/alloy

Explanation:
No explanation is available for this question!


11)   18/8 stainless steel means, that it contains__________________?

a. 18% chromium and 8% nickel
b. 18% chromium and 8% molybdenum
c. 18% nickel and 8% chromium
d. 18% molybdenum and 8% chromium
Answer  Explanation 

ANSWER: 18% chromium and 8% nickel

Explanation:
No explanation is available for this question!


12)   Aqueous nitric acid is stored in ______________ vessel?

a. Plain carbon steel
b. Stainless steel
c. Cast iron
d. Thermosetting plastic material
Answer  Explanation 

ANSWER: Cast iron

Explanation:
No explanation is available for this question!


13)   High speed steel should have high___________________?

a. Toughness
b. Wear resistance
c. Hardenability
d. Both B. & C.
Answer  Explanation 

ANSWER: Both B. & C.

Explanation:
No explanation is available for this question!


14)   Anodic material used for the cathodic protection of underground buried steel pipeline is_________________?

a. Nickel or copper
b. Zinc or magnesium
c. Bronze
d. Brass
Answer  Explanation 

ANSWER: Zinc or magnesium

Explanation:
No explanation is available for this question!


15)   Wrought iron is a suitable material of construction for handling _____________ solutions?

a. Dilute acidic
b. Concentrated acidic
c. Alkalis & alkaline
d. None of these
Answer  Explanation 

ANSWER: Alkalis & alkaline

Explanation:
No explanation is available for this question!


16)   Galvanising is generally done on___________________?

a. Non-ferrous metals
b. Low carbon steel
c. Stainless steel
d. Cast iron
Answer  Explanation 

ANSWER: Low carbon steel

Explanation:
No explanation is available for this question!


17)   Vycor, a widely used material for making ‘thermal wells’ in temperature measurement, is a_______________?

a. Cermet
b. Glass
c. Thermosetting plastic
d. Metallic alloy
Answer  Explanation 

ANSWER: Glass

Explanation:
No explanation is available for this question!


18)   Dry chlorine can be handled in a vessel made of__________________?

a. Iron or steel
b. PVC
c. Nickel
d. Brass
Answer  Explanation 

ANSWER: Iron or steel

Explanation:
No explanation is available for this question!


19)   Combination of metals and ceramics are called___________________?

a. Metalloy
b. Cermets
c. Pellets
d. Non-crystalline ceramics
Answer  Explanation 

ANSWER: Cermets

Explanation:
No explanation is available for this question!


20)   Biological shield in a nuclear power reactor is made of________________?

a. Concrete
b. Steel
c. Cadmium
d. Zircaloy
Answer  Explanation 

ANSWER: Concrete

Explanation:
No explanation is available for this question!


21)   As the impurities are oxidised, the melting point of iron___________________?

a. Decreases
b. Remains unchanged
c. Increases
d. May increase or decrease; unpredictable
Answer  Explanation 

ANSWER: Increases

Explanation:
No explanation is available for this question!


22)   Nitriding of steel is a process for________________?

a. Case hardening
b. Spheroidising
c. Normalising
d. Annealing
Answer  Explanation 

ANSWER: Case hardening

Explanation:
No explanation is available for this question!


23)   German silver is an alloy of copper, nickel and________________?

a. Zinc
b. Silver
c. Tin
d. Lead
Answer  Explanation 

ANSWER: Zinc

Explanation:
No explanation is available for this question!


24)   Which of the following finds the least commercial use ?

a. Pure iron
b. High silicon iron
c. Low carbon steel
d. High carbon steel
Answer  Explanation 

ANSWER: Pure iron

Explanation:
No explanation is available for this question!


25)   Polymerisation reactor used in the production of styrene butadiene rubber (SBR) is made of__________________?

a. Stainless steel or glass lined steel
b. Nickel clad steel
c. High silicon cast iron
d. Aluminium
Answer  Explanation 

ANSWER: Stainless steel or glass lined steel

Explanation:
No explanation is available for this question!


26)   Among the tin containing alloys, ______________ consumes the maximum amount of tin?

a. Solder
b. White metal
c. Pewter metal
d. Bronzes
Answer  Explanation 

ANSWER: Solder

Explanation:
No explanation is available for this question!


27)   Presence of nitrogen in steel___________________?

a. Makes it brittle
b. Increases its strength
c. Increases its hardness
d. Is desirable
Answer  Explanation 

ANSWER: Makes it brittle

Explanation:
No explanation is available for this question!


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

a. Solid solution hardening
b. Screw dislocation
c. Strain ageing
d. Twinning
Answer  Explanation 

ANSWER: Strain ageing

Explanation:
No explanation is available for this question!


29)   Beehive coke ovens are made of ________________ bricks?

a. Silica
b. Fireclay
c. Silicon carbide
d. Corundum
Answer  Explanation 

ANSWER: Silica

Explanation:
No explanation is available for this question!


30)   Which of the following material of construction may be recommended by a chemical engineer for handling a gaseous chlorine (dry or wet) stream in a fluid flow system ?

a. High silicon iron, silicon rubber, Kel-F and Teflon
b. Mild steel and stainless steel
c. Cast iron, tin and aluminium
d. Copper, nickel and Monel
Answer  Explanation 

ANSWER: High silicon iron, silicon rubber, Kel-F and Teflon

Explanation:
No explanation is available for this question!