11. In a tool life test, on doubling the tool speed the cutter life reduces to 1/8 of the original. Find Taylor’s tool life index?

A. 1/2

B. 1/3

C. 1/4

D. 1/8

Click for Answer/Explanation

Correct Answer is B

Using the Formula-

(V1/V2) = (T1/T2)n

12. Dry and compressed air is used as cutting fluid for machining-

A. Al

B. Steel

C. Cast Iron

D. Brass

Click for Answer/Explanation

Correct Answer is C

Other materials react with dry air to produce oxides

13. Which one of these is not related to grinding-

A. Buffing

B. Dressing

C. Glazing

D. Truing

Click for Answer/Explanation

Correct Answer is A

This Buffing term is similar to policing but very fine abrasive is used on soft disks made of cloth or hide.

Read More- Machine Design Objective Questions

14. Internal gears can be made by-

A. shaping with rack cutter

B. milling

C. hobbing

D. shaping with pinion cutter

Click for Answer/Explanation

Correct Answer is D

15. The main purpose of chaplets are-

A. to support the cores

B. to provide efficient venting

C. for aligning the mould boxes

D. to ensure directional solidification

Click for Answer/Explanation

Correct Answer is A

Please Comment Below