Top 51 Metallurgical Engineering MCQ Questions and Answers Pdf

Top 51+ Metallurgical Engineering MCQ Questions and Answers Pdf

Mar 22, 2024, By Meritnotes

Question 1 :

The main deposit of zinc ore in India is in

(a) Rajasthan

(b) Orissa

(c) Bengal

(d) Jharkhand

Answer: A

Rajasthan

Question 2 :

The main basic flux is

(a) Alumina and gravel

(b) Limestone and dolomite

(c) Magnesia and silica

(d) Quartz and sand

Answer: B

Limestone and dolomite

Question 3 :

Percentage of copper in pure mineral is maximum (about 89%) in?

(a) Malachite

(b) Chalcocite

(c) Chalcopyrite

(d) Cuprite

Answer: D

Cuprite

Question 4 :

The most significant property of aluminium alloy is its

(a) Ability for cold working

(b) Corrosion resistance

(c) High strength to weight ratio

(d) Machinability without tearing

Answer: C

High strength to weight ratio

Question 5 :

Atmospheric corrosion is

(a) Based on oxygen adsorption mechanism

(b) Due to dry atmosphere

(c) Frequent in non ferrous materials

(d) All a, b and c

Answer: A

Based on oxygen adsorption mechanism

Question 6 :

Which of the following is a permanent mould process?

(a) Sodium silicate moulding process

(b) Plaster moulding process

(c) Floor moulding process

(d) Centrifugal casting process

Answer: D

Centrifugal casting process

Question 7 :

_____ moulds are most suitable for satisfactory casting of reactive metals like titanium alloys.

(a) Loam sand

(b) Plaster of paris

(c) Dry sand

(d) Graphite

Answer: D

Graphite

Question 8 :

Heavy and large castings are usually made by the

(a) Pressure moulding

(b) Pit moulding

(c) Dry sand moulding

(d) Green sand moulding

Answer: C

Dry sand moulding

Question 9 :

Which is the most commonly used foundry clay?

(a) Kaolinite

(b) Limonite

(c) Fuller's earth

(d) Bentonite

Answer: D

Bentonite

Question 10 :

The main reducing agent in blast furnace is

(a) Air

(b) Hydrogen

(c) Limestone

(d) Carbon monoxide

Answer: D

Carbon monoxide

Question 11 :

Blast furnace hearth is lined with the

(a) Carbon dioxide

(b) Corundum bricks

(c) High alumina bricks

(d) Zirconia bricks

Answer: A

Carbon dioxide

Question 12 :

Which of the following is a demerit of electric arc steel making?

(a) Its capacity is low compared to other processes

(b) Higher temperature cannot be attained

(c) It cannot remove sulphur and phosphorous

(d) All types of steel cannot be made by this process

Answer: A

Its capacity is low compared to other processes

Question 13 :

Blast furnace slag is mainly molten

(a) Calcium silicate

(b) Iron pyrite

(c) Magnesium silicate

(d) Sand

Answer: A

Calcium silicate

Question 14 :

Black iron ore mainly contains

(a) Limonite

(b) Magnetite

(c) Hematite

(d) None of these

Answer: B

Magnetite

Question 15 :

Eschka process is used for determining the _____ sulphur of coal.

(a) Pyritic

(b) Sulphate

(c) Total

(d) Organic

Answer: C

Total

Question 16 :

Coning and quartering is a well known process of the sampling of

(a) Fuel gases

(b) Solid metallic scrap

(c) Molten metal

(d) Ore, coal and coke

Answer: D

Ore, coal and coke

Question 17 :

Which of the following alloying elements when added in plain carbon steel does not increase its hardeneability?

(a) Chromium

(b) Nickel

(c) Vanadium

(d) Molybdenum

Answer: B

Nickel

Question 18 :

Oxygen is blown in the L.D. converter through a water cooled lance, whose tip is made of

(a) Aluminium

(b) Brass

(c) Nickel

(d) Copper

Answer: D

Copper

Question 19 :

Elimination of _____ is completed first (in about six minutes after the starting of oxygen blow) in the L.D. process.

(a) Phosphorous

(b) Sulphur

(c) Manganese

(d) Silicon

Answer: D

Silicon

Question 20 :

Favourable condition for efficient removal of sulphur is

(a) Low basicity, high oxygen potential

(b) Low basicity, low oxygen potential

(c) High basicity, low oxygen potential

(d) High basicity, high oxygen potential

Answer: C

High basicity, low oxygen potential

Question 21 :

Mixed ionic covalent bonds are normally found in the

(a) Semi conductors

(b) Thermal insulators

(c) Semi conductors

(d) High strength metals

Answer: C

Semi conductors

Question 22 :

_____ of an atom implies, its capability to attract electrons to itself.

(a) Electronic defect

(b) Electropositivity

(c) Electronegativity

(d) Oxidation number

Answer: C

Electronegativity

Question 23 :

Which of the following is not a carbide forming element in steel?

(a) Cobalt

(b) Nickel

(c) Chromium

(d) Molybdenum

Answer: A

Cobalt

Question 24 :

Hardening of steel does not increase its

(a) Corrosion resistance

(b) Residual internal stresses

(c) Yield strength

(d) Tensile strength

Answer: A

Corrosion resistance

Question 25 :

Nickel in steel

(a) Unites with carbon

(b) Increases distortion in quenching

(c) Decreases toughness and resistance to impact

(d) Renders high chromium iron alloys austenitic

Answer: D

Renders high chromium iron alloys austenitic

Question 26 :

Which of the following has the least efficiency?

(a)Otto engine

(b) Diesel engine

(c) Carnot engine

(d) Stream engine

Answer: D

Stream engine

Question 27 :

Second law of thermodynamics is concerned with the

(a) Non cyclic processes only

(b) Irreversible processes only

(c) Amount of energy transferred

(d) Direction of energy transfer

Answer: D

Direction of energy transfer

Question 28 :

Reynolds number is the ratio of

(a) Viscous forces to surface tension

(b) Viscous forces to buoyancy forces

(c) Inertia forces to buoyancy forces

(d) Inertia forces to viscous forces

Answer: D

Inertia forces to viscous forces

Question 29 :

Inspection of surface cracks in the welding of non magnetic alloys is done by the ____ testing method.

(a) Magnaflux

(b) X-ray

(c) Ultrasonic

(d) Fluorescent

Answer: D

Fluorescent

Question 30 :

Hardness of a safety razor blade is best measured by the

(a) Rockwell superficial hardness test

(b) Shore or rebound hardness test

(c) Vicker's diamond pyramid test

(d) Brinell hardness test

Answer: A

Rockwell superficial hardness test

Question 31 :

In an exothermic chemical reaction, the reactants compared to the products have

(a) Higher temperature

(b) Same energy

(c) Less energy

(d) More energy

Answer: D

more energy

Question 32 :

The excess of energy of the reactants required to dissociate into products is known as the _____ energy.

(a) Binding

(b) Threshold

(c) Activation

(d) Thermal

Answer: C