VSSC Chemical Operator Maintanance mechanic Paper 2019

Vikram Sarabhai Space Centre Chemical Operator Maintenance mechanic Paper 2019

An operation performed for enlarging an existing hole upto a limited length from one end is called
(a) Boring
(b) Drilling
(c) Counter- Boring
(d) Coutner-Sinking

Which type of non-destructive test is suitable to check the internal defects of weld in high pressure boiler welding?
(a) Magnetic particle test
(b) Liquid penetrant test
(c) Visual test
(d) Radiographic test

Drill sleeve is used when the taper shank of the drill is
(a) Larger than the machine spindle
(b) Equal to the machine spindle
(c) Smaller than the machine spindle
(d) None of the above

A grinding wheel of 100 mm is running at 2100 rpm. Find out the surface speed in meter per minute
(a) 660 m/min
(b) 1047 m/min
(c) 66 m/min
(d) 6.6 m/min

The negative rake angle is generally provided on the tool made of
(a) High speed steel
(b) Tool steel
(c) High carbon steel
(d) Tungsten carbide

The width of the tool used to cut 10 mm pitch square thread is
(a) 10 mm
(b) 7.5 mm
(c) 5.0 mm
(d) 2.5 mm

The instrument used to measure high temperature in the furnance is
(a) Calorimeter
(b) Barometer
(c) Pyrometer
(d) Thermometer

Which one of the following is used for holding pipes more than 63 mm and up to 200 mm?
(a) Pipe vice
(b) Pipe wrench
(c) Chain pipe vice
(d) Foot print wrench

Which one of the following is the included ange of a pipe thread?
(a) 27 degree
(b) 55 degree
(c) 29 degree
(d) 90 degree

What type of threads are suitable for the lead screws of machine tools?
(a) British Association threads
(b) Withworth Screw threads
(c) Aceme threads
(d) Square threads