Chemical Engineering Mcqs

_______________ test can be termed as the semi-destructive test?

• (A)  Impact
• (B)  Torsion
• (C)  Hardness
• (D)  Charpy

Answer

Submitted By :Ali Uppal

Alloying elements present in Haynes stellite, which has superior performance than high speed steel, are____________________?

• (A)  Nickel, cobalt & chromium
• (B)  Tungsten, chromium & cobalt
• (C)  Manganese, chromium & cobalt
• (D)  Tungsten, molybdenum & nickel

Answer

Submitted By :Ali Uppal

Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than ?

• (A)  5
• (B)  10
• (C)  20
• (D)  35

Answer

Submitted By :Ali Uppal

Addition of _______________ to steel does not help in improving its machinability ?

• (A)  Sulphur
• (B)  Silicon
• (C)  Lead
• (D)  Phosphorous

Answer

Submitted By :Ali Uppal

A gas which is collected over water becomes moistened due to water vapor, exerts its own partial pressure at the gas temperature, which is termed as its_______________?

• (A)  Aqueous tension
• (B)  Saturated humidity
• (C)  Vapor pressure
• (D)  Absolute humidity

Answer

Submitted By :Ali Uppal

With increase in annealing temperature, the following defect density decreases?

• (A)  Vacancy
• (B)  Dislocation
• (C)  Grain boundary
• (D)  All of these

Answer

Submitted By :Ali Uppal

The leaching solvent used in Baeyer’s process for the purification of bauxite is___________________?

• (A)  Ammonium hydroxide
• (B)  Sodium carbonate
• (C)  Sodium hydroxide
• (D)  Ammonium carbonate

Answer

Submitted By :Ali Uppal

Boiling point of water gets lowered at high altitudes (e.g., hills), because ___________________?

• (A)  Temperature is low
• (B)  Atmospheric pressure is low
• (C)  Atmospheric pressure is high
• (D)  None of these

Answer

Submitted By :Ali Uppal

The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron ?

• (A)  159
• (B)  1837
• (C)  2537
• (D)  10000

Answer

Submitted By :Ali Uppal

Good design of the casing of a centrifugal pump aims at minimising the __________________________?

• (A)  Cavitation
• (B)  Frictional losses
• (C)  Kinetic energy loss
• (D)  Static head

Answer

Submitted By :Ali Uppal