VSSC Turner Paper 2019

Vikram Sarabhai Space Center Technician B Turner Paper 2019

External threads can be produced by means of
(a) Taps
(b) Dies
(c) Lathe machine
(d) All of the above

Tapper turning on lathe can be produced by
(a) Form tool method
(b) Compound slide method
(c) Tailstock offset method
(d) All of the above

Pilot hole drilling means
(a) Hole drilled by a pilot
(b) a small hole drilled into a material to guide a larger drill
(c) Drilling done by a machine
(d) Drilling continuously a number of holes

Drill drift is used for
(a) Drawing a drill location
(b) Fixing a chuck on the machine spindle
(c) Removing a broken drill from the work
(d) Removing the drill from the machine spindle

1 mm is equal to
(a) 1000 microns
(b) 100 microns
(c) 10 microns
(d) 10000 microns

Lock nut in the micrometer is provided to
(a) control the movement of the spindle
(b) lock the reading after setting it over the work piece
(c) Measure the work piece accurately
(d) lock the micrometer when it is not in use

Taper ring gauge is used to measure
(a) External taper
(b) Internal taper
(c) External and internal taper
(d) None of the above

Left hand thread means
(a) Thread advances as bolt is rotated clockwise
(b) Thread advances as bolt is rotated anticlockwise
(c) Bolt has to be tightened by left hand only
(d) None of the above

Lead of M8 x 1 bolt which is having 3 multi start thread is
(a) 1 mm
(b) 2 mm
(c) 3 mm
(d) 4 mm

Best wire size is the one which, when placed in the thread groove will make contact at
(a) minor diameter
(b) major diameter
(c) pitch diameter
(d) trough of the thread