CHEMICAL ENGINEERING BASICS QUIZ

Notched bar test is used for testing the __________ of a material.

Endurance limit

Machinability

Impact strength

Corrosion resistance

TRUE ANSWER : ?
YOUR ANSWER : ?

Oxygen cylinders used for autogenous (cutting/welding) purposes are

Welded steel cylinders

Made by sand casting

Heat treated before use

Seamless & made of steel

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following materials has the maximum shrinkage allowance ?

Aluminium alloy

Cast iron

Brass

Lead

TRUE ANSWER : ?
YOUR ANSWER : ?

In a casting, cold shut defect is caused by

Low pounhg temperature

Faulty gating system

Melt-mould reactions

Very low mould permeability

TRUE ANSWER : ?
YOUR ANSWER : ?

In age-hardenable alloys, maximum ductility is obtained

Immediately after solution treatment and subsequent quenching

After overageing

In as cast state

After optimum ageing

TRUE ANSWER : ?
YOUR ANSWER : ?

Ultimate strength in tension as compared to that in shear for steel is

One fourth

Half

One third

One and half times

TRUE ANSWER : ?
YOUR ANSWER : ?

Powder metallurgy is used to produce

High precision components with complex cavities and sharp features

Porosity free components

Components of large size

Components of such alloys whose constituents do not form alloys readily

TRUE ANSWER : ?
YOUR ANSWER : ?

For hardening high alloy steel, it is to be heated slowly and uniformly to avoid

Local hardening

Segregation

Warpage

Scale formation

TRUE ANSWER : ?
YOUR ANSWER : ?

If the head is doubled in & centrifugal pump, the power required will increase in the ratio of

21/3

23

23/2

25/2

TRUE ANSWER : ?
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In radiative heat transfer, a grey surface is the one, which has

Emissivity independent of wavelength

Zero reflectivity

Equal brightness in all directions

Grey appearance to the eye

TRUE ANSWER : ?
YOUR ANSWER : ?