REFRIGERATION AND AIR CONDITIONING QUIZ

Hastelloy comprises of

Copper and nickel

Lead and tin

Molybdenum and nickel

Copper and tin

TRUE ANSWER : ?
YOUR ANSWER : ?

Cast iron and steel pipes are produced by __________ casting.

Slush

Die

True centrifugal

Investment

TRUE ANSWER : ?
YOUR ANSWER : ?

Telfon (PTFE) is corroded by

Sulphuric acid

Hydrochloric acid (95%)

None of these

Hydrochloric acid (10%)

TRUE ANSWER : ?
YOUR ANSWER : ?

High speed steel should have high

Both B & C

Hardenability

Wear resistance

Toughness

TRUE ANSWER : ?
YOUR ANSWER : ?

For handling sulphuric acid of 95% strength, the suitable material of construction for pipes is

Nickel

Aluminium

Cast iron

Stainless steel

TRUE ANSWER : ?
YOUR ANSWER : ?

Mild steel storage vessels are suitable for the storage of

Sulphuric acid (25%)

Fatty acids

Anhydrous ammonia

Hydrochloric acid (95%)

TRUE ANSWER : ?
YOUR ANSWER : ?

The addition of antimony in tin-based alloys improves its

Impact strength and bonding strength

Wear resistance

Deformation resistance

Rupture strength and hot hardness

TRUE ANSWER : ?
YOUR ANSWER : ?

The process of coating steel sheets by zinc to improve its corrosion resistance is called

Galvanising

Zincification

Tempering

Calorising

TRUE ANSWER : ?
YOUR ANSWER : ?

Tank furnace used for melting of glass is made of

Stainless steel

Refractory blocks

Cast iron

Mild steel

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not used as the ceramic material in 'cermets'?

Carbides

Nitrides

Silicides

Oxides

TRUE ANSWER : ?
YOUR ANSWER : ?

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