Materials & Construction Mcqs for Chemical - Set 5

1)   Glass lined vessels are not used for handling__________________?

a. Dilute H2SO4
b. Dilute HNO3
c. Dilute HCI
d. Hydrofluoric acid
Answer  Explanation 

ANSWER: Hydrofluoric acid

Explanation:
No explanation is available for this question!


2)   Which of the following is the most elastic material ?

a. Plastic
b. Glass
c. Steel
d. Rubber
Answer  Explanation 

ANSWER: Steel

Explanation:
No explanation is available for this question!


3)   Materials having _____________ lattice structure are usually most ductile?

a. FCC
b. BCC
c. HCP
d. Cubic
Answer  Explanation 

ANSWER: FCC

Explanation:
No explanation is available for this question!


4)   ____________ alloys have the highest specific strength of all the structural materials out of the following?

a. Magnetic steel
b. Titanium
c. Chromium
d. Magnesium
Answer  Explanation 

ANSWER: Titanium

Explanation:
No explanation is available for this question!


5)   Shock resisting steels should possess high___________________?

a. Hardness
b. Toughness
c. Tensile strength
d. Wear resistance
Answer  Explanation 

ANSWER: Toughness

Explanation:
No explanation is available for this question!


6)   Out of the following, copper vessels are the most suitable for the storage of__________________?

a. Bromine
b. Dry chlorine & dry fluorine
c. Nitric acid (95% and fuming)
d. Phosphoric acid (95%) & sulphuric acid (95% and fuming)
Answer  Explanation 

ANSWER: Dry chlorine & dry fluorine

Explanation:
No explanation is available for this question!


7)   Plasticisers are added to polymers to improve their____________________?

a. Tensile strength
b. Softness & flexibility
c. Acid resistance
d. Alkali resistance
Answer  Explanation 

ANSWER: Softness & flexibility

Explanation:
No explanation is available for this question!


8)   Titanium metal_________________?

a. Exists in three allotropic forms
b. Cannot be welded
c. Is used in oceanographic and space exploration applications
d. None of these
Answer  Explanation 

ANSWER: Is used in oceanographic and space exploration applications

Explanation:
No explanation is available for this question!


9)   Graphite is corroded by_________________?

a. Sulphuric acid (10%)
b. Sea water
c. Hydrochloric acid
d. None of these
Answer  Explanation 

ANSWER: None of these

Explanation:
No explanation is available for this question!


10)   Creep is not exhibited at low temperature by _____________________?

a. Rubber
b. Acrylics
c. Lead
d. Plastics
Answer  Explanation 

ANSWER: Lead

Explanation:
No explanation is available for this question!


11)   Which of the following exercises most powerful influence on the mechanical properties of steel ?

a. Manganese
b. Carbon
c. Phosphorous
d. Silicon
Answer  Explanation 

ANSWER: Carbon

Explanation:
No explanation is available for this question!


12)   Babbitt metal (used for making bearings) comprises of__________________?

a. Mainly tin (85%) and lead
b. Saw dust and iron dust mixture
c. Zinc and aluminium
d. Copper and aluminium
Answer  Explanation 

ANSWER: Mainly tin (85%) and lead

Explanation:
No explanation is available for this question!


13)   Acid proof stoneware_________________?

a. Has very low strength
b. Cannot be heated
c. Is broken by small temperature changes
d. All A., B. and C.
Answer  Explanation 

ANSWER: All A., B. and C.

Explanation:
No explanation is available for this question!


14)   Light weight metallic alloy used in aircraft industry is________________?

a. Aluminium
b. High silicon (14%) iron
c. Duralumin
d. Phosphor bronze
Answer  Explanation 

ANSWER: Duralumin

Explanation:
No explanation is available for this question!


15)   Which one contains the least percentage of carbon ?

a. Wrought iron
b. High speed steel
c. Cast iron
d. Pig iron
Answer  Explanation 

ANSWER: Wrought iron

Explanation:
No explanation is available for this question!


16)   Ceramic materials are____________________?

a. Organic in nature
b. Stronger in compression than in tension
c. Always amorphous in nature
d. Always bad heat conductors
Answer  Explanation 

ANSWER: Stronger in compression than in tension

Explanation:
No explanation is available for this question!


17)   Plastics are____________________?

a. Used in very high temperature applications
b. Non-biodegradable
c. Not suitable for drainage pipe manufacture
d. All A., B. & C.
Answer  Explanation 

ANSWER: Non-biodegradable

Explanation:
No explanation is available for this question!


18)   SO3 is absorbed using H2SO4 in a____________________?

a. Cast iron packed tower
b. Stainless steel plate tower
c. Packed steel tower lined with acid proof bricks
d. None of these
Answer  Explanation 

ANSWER: Packed steel tower lined with acid proof bricks

Explanation:
No explanation is available for this question!


19)   Nitriding of steel is done (in electric furnace) at _____________ °C?

a. 510
b. 1720
c. 2210
d. 910
Answer  Explanation 

ANSWER: 510

Explanation:
No explanation is available for this question!


20)   Brass is an alloy of____________________?

a. Nickel and tin
b. Copper and zinc
c. Tin and lead
d. Copper, nickel and zinc
Answer  Explanation 

ANSWER: Copper and zinc

Explanation:
No explanation is available for this question!


21)   A hardened steel essentially contains___________________?

a. Sorbite
b. Troostite
c. Martensite
d. None of these
Answer  Explanation 

ANSWER: Martensite

Explanation:
No explanation is available for this question!


22)   Silicone rubber is not resistant to the corrosive action of____________________?

a. Sulphuric acid (10%)
b. Sulphuric acid (95%)
c. Ether
d. Both B. and C.
Answer  Explanation 

ANSWER: Both B. and C.

Explanation:
No explanation is available for this question!


23)   The fermenter used in the production of penicillin (by deep fermentation process) is made of___________________?

a. Glass
b. Glass lined steel
c. High silicon cast iron
d. Porcelain
Answer  Explanation 

ANSWER: Glass lined steel

Explanation:
No explanation is available for this question!


24)   The heat treatment process applied to cold formed steel parts is ____________________?

a. Normalising
b. Tempering
c. Artificial ageing
d. Solution annealing
Answer  Explanation 

ANSWER: Solution annealing

Explanation:
No explanation is available for this question!


25)   An ideal material of construction for the storage of 50% caustic soda solution would be___________________?

a. Karbate
b. High silicon cast iron
c. Monel
d. None of these
Answer  Explanation 

ANSWER: Monel

Explanation:
No explanation is available for this question!


26)   Stainless steel is not corroded by _____________________?

a. Hydrochloric acid (10%)
b. Nitric acid (10%)
c. Sulphuric acid (10%)
d. Saturated brine
Answer  Explanation 

ANSWER: Nitric acid (10%)

Explanation:
No explanation is available for this question!


27)   In hot wire anemometer used for gas flow measurement, the wire is normally made of ______________________?

a. Copper
b. Platinum
c. Constantan
d. Chromium
Answer  Explanation 

ANSWER: Platinum

Explanation:
No explanation is available for this question!


28)   Addition of 2% nickel in steel makes it suitable for making ___________________?

a. Electronic valves
b. Boiler plates, rivets etc.
c. Turbine blades
d. Connecting rod
Answer  Explanation 

ANSWER: Boiler plates, rivets etc.

Explanation:
No explanation is available for this question!


29)   Low carbon steels are those in which carbon percentage is around____________________?

a. 0.1 to 0.35
b. 0.4 to 0.7
c. 0.8 to 1.5
d. 1.5 to 2
Answer  Explanation 

ANSWER: 0.1 to 0.35

Explanation:
No explanation is available for this question!


30)   Nickel and copper are the basic constituents of__________________?

a. Hastelloy
b. Monel metal
c. German silver
d. Inconel
Answer  Explanation 

ANSWER: Monel metal

Explanation:
No explanation is available for this question!