VSSC Turner Paper 2015

Vikram Sarabhai Space Center Turner Paper 2015

A reamed hole has patches of poor surface finish. Which one of the following is the cause for this defect?
(a) The bored hole has insufficient reaming allowance
(b) Excessive cutting speed
(c) Wrong selection of the reamer for the job
(d) Insufficient coolant supply

The included angle of the countersinking of a centre drill of type ‘B’ used for protecting the center hole is
(a) 75 degree
(b) 90 degree
(c) 100 degree
(d) 120 degree

Choose the correct formula to find the dia of job d in mm if the cutting speed (V) in m/min and the revolution per minute (n) are given
(a) d= 1000V/piexn
(b) d= piexn/1000xV
(c) d= 1000 x pie/Vxn
(d) d= 1000xn/piexV

High speed steel is an alloy of
(a) Tungsten, steel, copper
(b) Steel, Nickel
(c) Tugsten, chromium, vanadium
(d) Nickel

The surface of a lathe bed should be
(a) Rough
(b) Clean
(c) True
(d) None of the above

The accessory of a carriage is
(a) tail stock
(b) cross slide
(c) chuck
(d) head stock

The tool post is mounted on the
(a) head stock
(b) bed
(c) tail stock
(d) None of the above

Which of the following method is suitable for turning steep taper?
(a) Offsetting the tail stock method
(b) Form tool plunging
(c) Swiveling the compound slide
(d) Combination of the lathe compound slide

Offsetting the tailstock is used for turning
(a) Length tapers with a small taper angles
(b) small tapers
(c) Medium size tapers
(d) small tapers with small taper angles