ISRO Draughtsman-B Mechanical Question Paper - 2017 (Set -1) with Answer Key

ISRO Draughtsman-B Mechanical Question Paper - 2017 (Set -1) with Answer Key

11) Bearings are used for

Answer is:

reducing frictional coefficient

Explanation:

Bearings are used for
Support and hold the shaft in a fixed position
Allow the shaft to run freely
Minimize the rubbing action

Bearings are used for

12) Riveted joint has lowest efficiency in case of

Answer is:

single riveted lap joint

Riveted joint has lowest efficiency in case of

13) "AMLAYMOV" command in AutoCAD software is to

Answer is:

move object to a layer

14) A rod of 1000 mm length has elongated by 5 mm. What is the strain in the rod?

Answer is:

0.005

15) Which one is the most ductile material?

Answer is:

Mild steel

Explanation:

Ductility: Ductility is the property by which a metal can be drawn into thin wires. It is determined by percentage elongation and percentage reduction in area of a metal.
Mild Steel has maximum ductility.