Materials & Construction Mcqs for Chemical - Set 6

1)   Tubes of multiple effect evaporator used for concentration of sugar cane juice are made of __________________?

a. Nickel
b. Copper
c. Stainless steel
d. Brass
Answer  Explanation 

ANSWER: Copper

Explanation:
No explanation is available for this question!


2)   Sulphuric acid pickling tanks are lined with__________________?

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

ANSWER: Rubber

Explanation:
No explanation is available for this question!


3)   With increase in carbide/graphite ratio in cast iron, its__________________?

a. Hardness & brittleness increases
b. Ductility decreases
c. Both A. and B.
d. Neither A. nor B.
Answer  Explanation 

ANSWER: Both A. and B.

Explanation:
No explanation is available for this question!


4)   Which is an amorphous material ?

a. Glass
b. Mica
c. Brass
d. Cast iron
Answer  Explanation 

ANSWER: Glass

Explanation:
No explanation is available for this question!


5)   Ammonium chloride solution is stored/ treated in _____________ vessels/pipes?

a. Plain carbon steel
b. Stainless steel
c. Rubber or durmet-20 lined
d. Lead
Answer  Explanation 

ANSWER: Rubber or durmet-20 lined

Explanation:
No explanation is available for this question!


6)   In order to be called steel, an alloy should have iron percentage greater than____________________?

a. 80
b. 70
c. 90
d. 50
Answer  Explanation 

ANSWER: 80

Explanation:
No explanation is available for this question!


7)   The process of heating the cold pressed metallic powder is called ______________ in powder metallurgy?

a. Precipitation
b. Fusion
c. Sintering
d. Agglomeration
Answer  Explanation 

ANSWER: Sintering

Explanation:
No explanation is available for this question!


8)   The carbonating tower used in Solvay process of soda ash manufacture is made of_________________?

a. Cast iron
b. Stainless steel
c. Karbate
d. Lead lined steel
Answer  Explanation 

ANSWER: Cast iron

Explanation:
No explanation is available for this question!


9)   Which of the following alloys does not contain nickel ?

a. Chloro, et-2 alloy
b. Monel
c. Inconel
d. Babbitt metal
Answer  Explanation 

ANSWER: Babbitt metal

Explanation:
No explanation is available for this question!


10)   Hardest material so far found is__________________?

a. Diamond
b. Graphite
c. Carborundum
d. Pumice stone
Answer  Explanation 

ANSWER: Diamond

Explanation:
No explanation is available for this question!


11)   The heat treatment process to which castings and the steel balls produced by cold heading are subjected is____________________?

a. Tempering
b. Normalising
c. Annealing
d. None of these
Answer  Explanation 

ANSWER: Normalising

Explanation:
No explanation is available for this question!


12)   Which of the following has the highest density and the lowest melting point ?

a. Stainless steel
b. Titanium
c. Lead
d. Aluminium
Answer  Explanation 

ANSWER: Lead

Explanation:
No explanation is available for this question!


13)   Which of the following is the hardest _______________?

a. Cementite
b. Pearlite
c. Austenite
d. Ferrite
Answer  Explanation 

ANSWER: Austenite

Explanation:
No explanation is available for this question!


14)   For platinum thermocouples, lead wires are made of___________________?

a. Copper & copper-nickel alloys
b. Copper & iron
c. Iron & nickel
d. Tin & nickel
Answer  Explanation 

ANSWER: Copper & copper-nickel alloys

Explanation:
No explanation is available for this question!


15)   Which of the following is the lightest of engineering metals ?

a. Magnesium
b. Aluminium
c. Titanium
d. Tin
Answer  Explanation 

ANSWER: Magnesium

Explanation:
No explanation is available for this question!


16)   The most resistant material to alkaline corrosion is____________________?

a. Duriron
b. Nickel
c. Aluminium
d. Karbate
Answer  Explanation 

ANSWER: Nickel

Explanation:
No explanation is available for this question!


17)   Plate and frame filter press is usually made of__________________?

a. Mild steel
b. Cast iron
c. Stainless steel
d. Galvanised iron
Answer  Explanation 

ANSWER: Cast iron

Explanation:
No explanation is available for this question!


18)   Nickel is a constituent of ________________________?

a. Bronze
b. Solder
c. Duralumin
d. Monel metal
Answer  Explanation 

ANSWER: Monel metal

Explanation:
No explanation is available for this question!


19)   Platinum and silver are corroded by___________________?

a. Caustic soda solution
b. Phosphoric acid
c. Sulphuric acid (10%)
d. None of these
Answer  Explanation 

ANSWER: None of these

Explanation:
No explanation is available for this question!


20)   Valves in pipe size of 2″ and under are normally made of_______________________?

a. Wrought iron
b. Brass
c. Bronze
d. Monel
Answer  Explanation 

ANSWER: Brass

Explanation:
No explanation is available for this question!


21)   Wood metal is not used for making___________________?

a. Soft solder
b. Casting for dental work
c. Storage tank for storing brine and caustic soda
d. Fusible safety plug for pressure cooker
Answer  Explanation 

ANSWER: Storage tank for storing brine and caustic soda

Explanation:
No explanation is available for this question!


22)   Nickel (76%) and chromium (15%) alloys are termed as______________________?

a. Inconel
b. Monel
c. Aluminium bronzes
d. Brass
Answer  Explanation 

ANSWER: Inconel

Explanation:
No explanation is available for this question!


23)   Babbitt metal is not a___________________________?

a. Tin base alloy
b. White metal
c. Lead base alloy
d. Pure metal
Answer  Explanation 

ANSWER: Pure metal

Explanation:
No explanation is available for this question!


24)   Photographic plates are coated with_________________?

a. Silver nitrate
b. Silver halide
c. Calcium silicate
d. Metallic silver
Answer  Explanation 

ANSWER: Silver halide

Explanation:
No explanation is available for this question!


25)   Presence of 0.3 to 0.5% arsenic in copper increases its____________________?

a. Ductility
b. Malleability
c. Tenacity & hardness
d. Electrical conductivity
Answer  Explanation 

ANSWER: Tenacity & hardness

Explanation:
No explanation is available for this question!


26)   Acetylene gas holder is made of__________________?

a. Copper
b. Cast iron
c. Steel
d. Monel metal
Answer  Explanation 

ANSWER: Steel

Explanation:
No explanation is available for this question!


27)   Babbitt metals used for making bearings are _________________?

a. Tin or lead based alloys
b. Short of antifrictional properties
c. Having homogenous microstructure
d. Yellow metals
Answer  Explanation 

ANSWER: Tin or lead based alloys

Explanation:
No explanation is available for this question!


28)   Carbon percentage is the same in cast iron and_________________?

a. Wrought iron
b. Pig iron
c. Mild steel
d. High silicon (14%) iron
Answer  Explanation 

ANSWER: Pig iron

Explanation:
No explanation is available for this question!


29)   Nickel (56%) and molybdenum (17%) alloys are called________________?

a. Monel
b. Hastelloy C
c. Inconel
d. Bronzes
Answer  Explanation 

ANSWER: Hastelloy C

Explanation:
No explanation is available for this question!


30)   Specify the material of construction suitable for handling concentrated HNO3 at 100°C ?

a. High silicon iron, Kel-F and Teflon
b. Tin and wood
c. Silicone rubber
d. Stainless steel
Answer  Explanation 

ANSWER: High silicon iron, Kel-F and Teflon

Explanation:
No explanation is available for this question!