WBCS Mains Chemistry Metallurgy, Alloys Questions 2022

Q. Minor gypsum is added to cement clinker during its grinding in order to
(A) Increase the plasticity of the cement paste
(B) Decrease the plasticity of the cement paste
(C) Increase the plasticity and increase initial setting time of the cement paste
(D) Reduce plasticity and quick setting of cement paste

Correct Answer: (C) Increase the plasticity and increase initial setting time of the cement paste

Q. Thick paste of cement, sand, stone chips and water is
(A) Mortar
(B) Concrete
(C) Reinforced Cement Concrete
(D) Monoliths

Correct Answer: (B) Concrete

Q. The process of zone refining is used for ultra-purification of
(A) Si
(B) Ge
(C) Ga
(D) All of the above

Correct Answer: (D) All of the above

Q. Brass is the alloy of
(A) Cu & Zn
(B) Cu & Sn
(C) Cu & Al
(D) Zinc and Tin

Correct Answer: (A) Cu & Zn

Q. Thermit welding uses Al powder because of
(A) Its lightness
(B) Its lower melting point
(C) Its greater affinity for O₂
(D) All of the above

Correct Answer: (C) Its greater affinity for O₂

Q. The metal extracted from bauxite ore using Bayer’s process is
(A) Al
(B) Zn
(C) Pb
(D) Ba

Correct Answer: (A) Al

Q. Which of the following is protected by passivation?
(A) Mild Steel
(B) Silver
(C) Bronze
(D) Stainless Steel

Correct Answer: (D) Stainless Steel

WBCS Mains Chemistry Metallurgy, Alloys Questions 2021

Q. Monazite is an ore of
(A) Titanium
(B) Zirconium
(C) Iron
(D) Thorium

Correct Answer: (D) Thorium

WBCS Mains Chemistry Metallurgy, Alloys Questions 2019

Q. The electric arc furnace is used for recycling of
(A) Cu
(B) Zn
(C) Fe
(D) Cr

Correct Answer: (C) Fe

WBCS Mains Chemistry Metallurgy, Alloys Questions 2018

Q. The oxide functioning as Piezoelectric substance is
(A) Al₂O₃
(B) ZrO₂
(C) TiO₂
(D) BaTiO₃

Correct Answer: (D) BaTiO₃

Q. A thick mass of cement, sand and water is called
(A) Concrete
(B) RCC
(C) Mortar
(D) Monolith

Correct Answer: (A) Concrete

Q. Bronze is the alloy of
(A) Copper and Zinc
(B) Copper and Tin
(C) Copper and Nickel
(D) Zinc and Tin

Correct Answer: (B) Copper and Tin

Q. The process of very slow cooling in metallurgy is known as
(A) Quenching
(B) Annealing
(C) Hardening
(D) Cold working

Correct Answer: (B) Annealing

Q. The metal extracted from haematite using blast furnace is
(A) Zn
(B) Cu
(C) Al
(D) Fe

Correct Answer: (D) Fe

WBCS Mains Chemistry Metallurgy, Alloys Questions 2017

Q. Which one of the following materials does not show piezoelectric behavior?
(A) Quartz
(B) Rochelle salt
(C) Rutile
(D) Barium titanate

Correct Answer: (C) Rutile

Q. The melting point of silica is
(A) 1723°C
(B) 2050°C
(C) 2300°C
(D) 1810°C

Correct Answer: (B) 2050°C

Q. The potash feldspar is known as
(A) Orthoclase
(B) Albite
(C) Anorthite
(D) Dickite

Correct Answer: (A) Orthoclase

Q. Which one of the following constitutes the common glass composition?
(A) Sodium Silicate
(B) Calcium Silicate
(C) Calcium and Sodium Silicate
(D) Lead Silicate

Correct Answer: (C) Calcium and Sodium Silicate

Q. Stainless steel contains
(A) Fe + Cr + Ni
(B) Fe + Ni + Cu
(C) Fe + Mn + Cr
(D) Fe + Co + Ni

Correct Answer: (A) Fe + Cr + Ni

Q. Bell metal is an alloy of
(A) Cu + Sn
(B) Cu + Zn
(C) Cu + Ni
(D) Cu + Mn

Correct Answer: (A) Cu + Sn

Q. Which element has the greatest ductility property?
(A) Cu
(B) Ag
(C) Au
(D) Pt

Correct Answer: (C) Au

Q. Aluminum is extracted from bauxite by
(A) Bayer’s process
(B) Downs process
(C) Solvay process
(D) Oswald process

Correct Answer: (A) Bayer’s process

Q. The maximum consumption of refractories involves in
(A) Glass Industries
(B) Iron and Steel Plants
(C) Cement Plants
(D) Petroleum Industries

Correct Answer: (B) Iron and Steel Plants

Q. The process of zone refining is used for ultra-purification of
(A) Silicon
(B) Germanium
(C) Gallium
(D) All of the above

Correct Answer: (D) All of the above

Q. The base composition of whiteware body contains
(A) Clay, Quartz and Talc
(B) Quartz, Clay and Feldspar
(C) Talc, Bauxite and Wollastonite
(D) Clay, Gypsum and Feldspar

Correct Answer: (B) Quartz, Clay and Feldspar

Q. Which of the following metals does not form amalgam?
(A) Iron
(B) Sodium
(C) Zinc
(D) Magnesium

Correct Answer: (A) Iron

Q. The Crown glass is an
(A) Optical glass
(B) Radiation shield glass
(C) Safety glass
(D) Toughened glass

Correct Answer: (A) Optical glass

WBCS Mains Chemistry Metallurgy, Alloys Questions 2016

Q. Silica in amorphous form is used in
(A) Photovoltaic cell
(B) Conductivity cell
(C) Standard hydrogen electrode
(D) None of the above

Correct Answer: (A) Photovoltaic cell

WBCS Mains Chemistry Metallurgy, Alloys Questions 2015

Q. In the metallurgy of iron, the material obtained from the bottom of the blast furnace is
(A) Slag
(B) Pig iron
(C) Cast iron
(D) Wrought iron

Correct Answer: (B) Pig iron

Q. The main ore of aluminium is
(A) Bauxite
(B) Alumina
(C) Potash-alum
(D) Cryolite

Correct Answer: (A) Bauxite

Q. Which one of the following does not contain silver?
(A) Horn Silver
(B) German Silver
(C) Ruby Silver
(D) Lunar Caustic

Correct Answer: (B) German Silver

Q. Carnalite on electrolysis gives
(A) Ca & Cl₂
(B) Na & CO₂
(C) Al & Cl₂
(D) Mg & Cl₂

Correct Answer: (D) Mg & Cl₂

Q. Most glass contains about 71% by weight of
(A) Silicon dioxide
(B) Carbon dioxide
(C) Sulphur dioxide
(D) Calcium carbonate

Correct Answer: (A) Silicon dioxide