1747. Steel pipes are normally manufactured by __________ process.
Extrusion
Cold working
Forging
Electroforming
✅ The correct answer is option A.
1749. ‘Hypersil’ is a __________ steel.
High speed
Silicon
Molybdenum
Tungsten
✅ The correct answer is option B.
1751. Zircalloy used as a fuel cladding material in a nuclear reactor (thermal) is an alloy of zirconium
Tin, nickel, iron and chromium
And graphite
And copper
None of these
✅ The correct answer is option A.
1753. Acetaldehyde is produced by hydration of acetylene in a sulphuric acid solution of mercuric sulphate. Hydration tower is made of
Rubber lined mild steel
Lead lined mild steel
Aluminium
Cast iron
✅ The correct answer is option A.
1716. The presence of impurities in iron
Increases its melting point
Does not affect its melting point
Decreases its melting point
Makes it malleable
✅ The correct answer is option C.
1719. Wood metal is not used for making
Soft solder
Casting for dental work
Storage tank for storing brine and caustic soda
Fusible safety plug for pressure cooker
✅ The correct answer is option C.
1722. Carbon is present in the combined form (carbide) in case of
Pig iron
Steel
Ferroalloys
All of the above
✅ The correct answer is option D.
1725. Dilute sulphuric acid is transported in __________ pipes.
Mild steel
Lead
Copper
Special alloys
✅ The correct answer is option B.
1728. __________ does not contain tin as an alloying material.
Brass
Pewter
Solder
Babbit metal
✅ The correct answer is option A.
1731. Which of the following alloying elements is present in maximum percentage in high speed steel.
Molybdenum
Chromium
Tungsten
Vanadium
✅ The correct answer is option C.