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ISRO Technician-B
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ISRO Technician-B Fitter 2019
14

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

14) Choose a drilling machine for drilling multiple holes of larger diameters

Sensitive bench drilling machine

Pillar drilling machine

Column drilling machine

Radial drilling machine

Answer is:

Radial drilling machine

Explanation:

Radial drilling machine's are used for for drilling multiple holes of larger diameters.

Choose a drilling machine for drilling multiple holes of larger diameters

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

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15) A Metric Outside micrometer of range 100-125 mm is used to measure the diameter of a rod. Barrel graduation showed 16.5 and the thimble graduation in line with the barrel datum line was 28. What is the diameter of the rod?

16.78 mm

16.64 mm

116.64 mm

116.78 mm

Answer is:

116.78 mm

16) Carbon content in wrought iron is

0.2 to 0.3 percent

0.3 to 0.8 percent

0.02 to 0.03 percent

0.1 to 0.2 percent

Answer is:

0.02 to 0.03 percent

17) The heat treatment of steel to obtain softness, improved machinability, increased ductility, to relieve internal stresses and to refine the grain size is called

Annealing

Tempering

Nitriding

Hardening

Answer is:

Annealing

Explanation:

The heat treatment of steel to obtain softness, improved machinability, increased ductility, to relieve internal stresses and to refine the grain size is called as Annealing

18) At room temperature, plain carbon steel contains

Ferrite and cementite

Ferrite and pearlite

Pearlite and Cementite

Ferrite, Cementite and Pearlite

Answer is:

Pearlite and Cementite

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

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14) Choose a drilling machine for drilling multiple holes of larger diameters

Radial drilling machine

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

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

15) A Metric Outside micrometer of range 100-125 mm is used to measure the diameter of a rod. Barrel graduation showed 16.5 and the thimble graduation in line with the barrel datum line was 28. What is the diameter of the rod?

116.78 mm

16) Carbon content in wrought iron is

0.02 to 0.03 percent

17) The heat treatment of steel to obtain softness, improved machinability, increased ductility, to relieve internal stresses and to refine the grain size is called

Annealing

18) At room temperature, plain carbon steel contains

Pearlite and Cementite

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