Materials and Construction MCQs

1.Identify the incorrect statement from the following:

Heating a material reduces its toughness.Wrought iron is commonly used to manufacture crane hooks.Cold working a metal lowers its fatigue resistance.Recrystallisation temperature is the point where new grains develop in a metal.

2.Identify the incorrect statement from the following options:

Pure rubber is as impractical as pure gold when used as a construction material.Aluminium has greater thermal conductivity than copper, which is why it is commonly used to make cookware.Copper exhibits poor weldability characteristics.Reinforced plastics consist of both thermoplastic and thermosetting polymers.

3.Identify the incorrect statement from the following:

Wrought iron typically has around 0.02% carbon content.Wrought iron is difficult to forge and weld.Chilled cast iron lacks graphite in its structure.Graphite flakes are present in spheroidal grey cast iron.

4.Which of the following statements is accurate?

Stainless steel is simply steel covered with a chromium layer.A soft metal can be hardened by combining it with other metals or non-metals.Plastic deformation refers to a material's reversible change in shape when stress is applied.The rusting process of iron does not involve electrochemical reactions.

5.Identify the incorrect statement from the following options:

Hardening increases the brittleness of steel.High alloy steels have alloying elements exceeding 50%.18/8 stainless steel exhibits magnetic properties.Both statements B and C are incorrect.

6.Identify the incorrect statement from the following options:

Alloys possess greater hardness compared to the individual metals they contain.Adding silicon to steel reduces its electrical resistivity.Karbate is known as a material resistant to acidic environments.Nichrome, an alloy of steel with 10% nickel and 20% chromium, is suitable for use at temperatures up to 1100°C.

7.Identify the incorrect statement about tin from the options below:

Tin can be easily stretched into extremely thin wires.Tin can undergo extensive cold working without needing annealing because of its low recrystallization temperature.Tin has two different allotropic forms.The main application of tin is as a coating material for steel and copper alloys.

8.Identify the incorrect statement from the following:

Bronze is a mixture of copper and tin.Brass is composed of copper and zinc.German silver is an alloy that contains no actual silver.Ductility refers to a material’s tendency to break without significant deformation.

9.What is the scale range of Mohs hardness scale?

From 1 up to 15Between 1 and 8From 1 to 10Starting at 0 and ending at 10

10.Which of the following materials exhibits viscoelastic behavior?

CorkGlassGraphiteRubber

11.Which of the following substances is suitable for storage in an aluminum container?

Aqua regia solutionFerrous sulfate compound10% Hydrochloric acidNone of the above

12.Which of these alloys is free from nickel content?

13.What is the typical carbon content range found in medium carbon steel?

14.Which heat treatment method is applied to reduce the hardness of a previously hardened material?

NormalizingTemperingAnnealingNone of the above

15.In which of the following materials are the intermolecular forces the weakest?

16.Which of the following substances is never transported in glass carboys?

AmmoniaAcetic acidPhenolFormaldehyde

17.Silico-manganese steels with approximately 0.7% manganese, 0.5% carbon, and 2% silicon are primarily utilized in which of the following applications?

Never need heat treatment for any purposeCommonly employed in manufacturing leaf and coil springsExhibit poor resilience characteristicsAre tempered at a temperature of 850°CAre mainly used for structural beams