Chemical Engineering Mcqs

A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material ?

• (A)  Steel
• (B)  Glass
• (C)  Rubber
• (D)  Brass

Answer

Submitted By :Ali Uppal

The expected efficiency of a single riveted lap joint is of the order of 50%. If the thickness of the plate is increased four times, then the rivet diameter will have to be increased ___________________ times ?

• (A)  Two
• (B)  Four
• (C)  Six
• (D)  Eight

Answer

Submitted By :Ali Uppal

In TIG welding, thoriated tungsten electrodes are used, because it ____________________?

• (A)  Has higher current carrying capacity
• (B)  Has better electron emissivity
• (C)  Is stronger than ordinary tungsten
• (D)  Is easy to prepare

Answer

Submitted By :Ali Uppal

In the formation of cermets, the ratio of ceramic material to metallic material is usually 80:20. Which of the following is a cermet ?

• (A)  Zirconia
• (B)  Alumina
• (C)  Bakelite
• (D)  Tungsten carbide

Answer

Submitted By :Ali Uppal

For separating small pieces of metal from engine oil of a car, the best separating technique is the _____________________ ?

• (A)  Chromatography
• (B)  Evaporation
• (C)  Filtration
• (D)  Fractional distillation

Answer

Submitted By :Ali Uppal

Out of the following, which will fracture most readity, when hit with a hard hammer ?

• (A)  Brass
• (B)  Bronze
• (C)  German silver
• (D)  Cast iron

Answer

Submitted By :Ali Uppal

__________________ stress cannot be sustained by a fluid in equilibrium ?

• (A)  Shear
• (B)  Tensile
• (C)  Compressive
• (D)  None of these

Answer

Submitted By :Ali Uppal

Oxyacetylene reducing flame is used while carrying out welding on___________________?

• (A)  Alloy steel
• (B)  Grey cast iron
• (C)  Mild steel
• (D)  High carbon steel

Answer

Submitted By :Ali Uppal

For a spontaneous natural process at constant temperature and pressure, the free energy of the system always____________________?

• (A)  Increases
• (B)  Decreases
• (C)  Remain constant
• (D)  Increases to a maximum before decreasing

Answer

Submitted By :Ali Uppal

To improve the machinability of steel, it is generally subjected to _____________________?

• (A)  Spheroidising
• (B)  Tempering
• (C)  Normalising
• (D)  Annealing

Answer

Submitted By :Ali Uppal