Chemical Engineering Basics MCQs

Question 1

High __________ of cast iron makes it suitable for use in machine beds.

Accepted Answer

Compressive strength

Answer

Endurance strength

Answer

Damping capacity

Answer

Tensile strength

Question 2

__________ test determines the yield strength, Young's modulus of elasticity, percentage reduction in area & percentage elongation of a material.

Accepted Answer

Tensile

Answer

Fatigue

Answer

Impact

Answer

None of these

Question 3

Duralumin is an alloy of aluminium and copper. Percentage of copper in duralumin is

Accepted Answer

4

Answer

38

Answer

26

Answer

16

Question 4

Stainless steel is welded using

Accepted Answer

Inert gas arc welding

Answer

Oxy-acetylene flame

Answer

Oxy-hydrogen flame

Answer

Arc welding

Question 5

Pick out the wrong statement about the machinability of metals. Machinability of a metal

Accepted Answer

Decreases with increases in tensile strength & decrease in grain size

Answer

Decreases with increase in strain hardening tendencies

Answer

Decreases with increase in hardness, in general

Answer

Depends on the composition, microstructure and physical & mechanical properties

Question 6

Steel rods are normally used for concrete reinforcement because concrete and steel have almost equal

Accepted Answer

Thermal co-efficient of expansion

Answer

Tensile strength

Answer

Compressive strength

Answer

Young's modulus

Question 7

Temper brittleness of a material can be fairly detected by the __________ test.

Accepted Answer

Notched bar impact

Answer

Fatigue

Answer

Tensile

Answer

Hardness

Question 8

Hardening of steel is not possible, unless it is heated __________ critical point.

Accepted Answer

Above the lowest

Answer

Above the highest

Answer

Between the first & second

Answer

Between the second & third

Question 9

__________ are not emitted by radioactive substances.

Accepted Answer

Protons

Answer

α-rays

Answer

β-rays

Answer

Positrons