53,

54.

56.

57

58.

59.

Ajob s to be faced holding it between centres. For supporting the job. Which of the following
centres, would you suggest ?

(^) Half Centre (ए) Ball Point Centre
{C) Revolving Centre (D) Pipe Centre

What do you understand by the term “HARDNESS” of a grinding wheel ?
(A) A grinding wheel to grind hard material.

(B) The strength of the bond to hold the abrasive grains together

(೧) The ability of a grinding wheel to separate the abrassive particles easily
(D) The Brinell hardness of the grinding wheel

To improve productivity in manufacturing jigs and fixtures are used
(A) Guides the tool while cutting

(B) s used only for drilling and boring operations

)© Only small components can be held by this

(D) It helps to hold the workpiece in the correct position

You have to mill an aluminium job which one of the following feature of the cutter is suitable
for this ? ,

(ക) Straight teeth cutter with larger wedge angle

(18) Helical teeth cutter with zero rake angle

(©) More number of cutting edges with more chip space
(D) Less number of cutting edges with more chip space

It is required to machine single start worm of 2 module (m) and 60 mm pitch diameter. The
speed ratiois 40 : 1.

(A) 293 mm (B) 33.3 mm (ಲ) 21 mm (D) 14.6 mm

A gear wheel has 20 teeth (7) and 3 mm module {m) its pitch diameter (pd) is
(A) 12 mm (B) 60 mm (C) 75 mm (D) 108 mm

What is the advantages of helical fluted taps ?

(ക) Drilling to minor diameter (B) Tapping on slotted hole
(0) Lubrication is easy (0) Self alingnment of tap is possible
9 150/2014

(7.1.0.