ISRO Technician-B Blacksmithy Question Paper - 2019 (Set-1) with Answer Key

ISRO Technician-B Blacksmithy Question Paper - 2019 (Set-1) with Answer Key

71) When more volume of acetylene and less volume of oxygen is supplied, the flame obtained is

Answer is:

Carburizing

72) Cold chisels are made by

Answer is:

Forging

Cold chisels are made by

73) The cross-section of a chisel is usually

Answer is:

Octagonal

74) Lathe bed is made of

Answer is:

Cast iron

Explanation:

Cast iron is commonly used for machinery housings or base due to its damping characteristics. It is also known for holding its shape when it is subjected to contraction and expansion due to temperature fluctuations. Hence lathe bed is usually made up of cast iron.

Lathe bed is made of

75) The hardness of steel depends on the amount of _____ it contains

Answer is:

Carbon