ISRO Previous Year Questions Paper 2016

May 23, 2020

1. Various alloying elements are added to produce different alloys steels, which one of the following combinations of alloy elements is used in HSS?
(a) Chromium, Nickel and Molybdenum
(b) Nickel, Molybdenum and Silicon
(c) Chromium, Vanadium and Manganese
(d) Chromium, Vanadium and Tungsten

2. It is required to finish grind a diamond 50mm hardened steel shaft on a cylindrical grinding machine, if the recommended surface speed of the work is 30 m/min,then r.p.m of the work is ?
(a) 190 (b) 150 (c) 210 (d) 250

3. Which gear arrangement used to change the circular motion of horizontal to vertical without change in speed ratio?
(a) Two spur gear (b) Two helical gear
(c) Two bevel gear (d) Worm and worm gear

4. Indexing head mechanisms works with?
(a) Rack and Pinion (b) Worm and Worm gear (c) Two helical gear (d) Two bevel gear

5. Which one of the bushes used in a drill jig permits tools of different diameter?
(a) Press fit bushes (b) Removable bushes (slip) (c) Fixed removable bushes (d) Linear bushes

6. A gear wheel has 36 teeth and 3 mm module, its pitch diameter is
(a) 12 mm (b) 75 mm (c) 80 mm (d) 108 mm

7. A hole whose lower deviations is zero is called basic hole, which one of the following letters indicates basic hole.
(a) E (b) F (c) G (d) H

8. The pattern on the work surface caused by the movement of the cutting tools is called?
(a) Waviness (b) Roughness (c) Surface Texture (d) Lay

9. By using quick return mechanism in shaping machine the cutting strokes moves slow and return strokes fast.What is the ratio between cutting strokes and return strokes?
(a) 2:3 (b) 3:2 (c) 5:3 (d) 3:5

10. A point to point control system is suitable only for one of the following applications?
(a) Milling profile (b) Turning (c) Drilling (d) Grinding

11. Counter boring is done for ?
(a) Deburring hole ends (b) Enlarging holes to accurate size (c) Finishing holes (d) Accommodating socket head screws

12. A main purpose of using Worm and Worm wheel drive in machines and their accessories is to?
(a) Transmit large torque
(b) Provide large speed reduction from Worm shaft to Worm wheel
(c) Transmit higher speeds
(d) Provide large speed reduction from Worm wheel to Worm shaft

13. Thread ring gauges are used to check external threads. Separate GO and NOGO gauging members are provided. Which one of the following screw thread elements is not checked with this ring gauges

(a) Pitch (b) Helix angle (c) Profile (d) Pitch diameter

14. What coolant is used for drilling the aluminum jobs?
(a) Mineral oil (b) Kerosene (c) Soluble oil (d) Dry air

15. Which one of the following is not a fundamental unit ?
(a) Pressure (b) Length (c) Mass (d) Time

16. In a riveted joint the edges of plates are simply laid over each other and riveted. The joint is called
(a) Butt joint (b) Lap joint (c) Edge joint (d) Corner joint

17. Gun metal is an alloy of
(a) Copper and Zinc (b) Tin and Zinc
(c) Copper, Tin and Zinc (d) Lead,Tin and Zinc

18. Which type of thread is oxygen cylinder regulator
(a) Acme (b) Left hand (c) Double start (d) Right hand

19. Example of non ferrous alloy is
(a) Aluminum (b) Brass (c) Tin (d) Zinc

20. Zinc coated on mild steel. It is known as
(a) Brittle (b) P.V.C (c) Softner (d) Galvanised iron

21. The ratio of ultimate stress to working stress is?
(a) Modulus of elasticity (b) Factor of safety (c) Change in Length (d) Tensile Load

22. Which of the following is non-metal
(a) Mercury (b) Sodium (c) Argon (d) Magnesium

23. Gauge used to measure the thickness of a wire or sheet.
(a) Profile gauge (b) Radius gauge (c) Wire gauge (d) Slip gauge

24. Point of the center punch is made at
(a) 60° (b) 45° (c) 90° (d) 75°

25. Which one of the following is not a tool instrument used for marking.
(a) Angle plate (b) V block (c) Surface plate (d) Dial indicator

26. Hermaphrodites caliper is also known as
(a) Odd leg caliper (b) Outside caliper
(c) Inside caliper (d) Spring caliper

27. Arrange the files in descending order of roughness
(a) Second cut,Bastard,Smooth
(b) Smooth, second cut, bastard
(c) Bastard,Second cut,Smooth
(d) NONE

28. Some teeth of a hacksaw blade are towards left and some on the right side alternately so that it may run smoothly in the slot, it is called
(a) Grade (b) Pitch (c) Teeth setting (d) All hard blade

29. Sizing of drilled hole is done by
(a) Tap (b) Counter sunk (c) Counter Bore
(d) Reamer

30. Which one of the following is not done by using a Reamer
(a) Cleaning a hole drilled out
(b) Tapering a hole
(c) Straightening of tilted hole
(d) Originating a hole

31. Tool used for withdrawing broken bolt,drill,reamer, screw etc out of a hole
(a) Die (b) Tap (c) Stud Extractor (d) Helicoil

32. Hammer used for drawing nails out of wooden articles
(a) Double face hammer (b) Ball pein hammer (c) Soft hammer (d) Claw hammer

33. Algebric distance between the maximum limit of size and the corresponding basic size is called
(a) Mean deviations (b) Lower deviations
(c) Fundamental deviations (d) Upper deviations

34. The relation between the two parts where one is inserted in to other with a certain degree of tightness or looseness is known as
(a) Allowance (b) Clearance (c) Tolerance (d) Fit

35. ...........fit there is a positive Allowance between the largest possible shaft and the smallest possible hole
(a) Transition (b) Interference (c) Clearance (d) NONE

36. A limit system in which hole is constant members and different fits are obtained by varying the size of the shaft is called
(a) Shaft basis system (b) Hole basis system (c) Interchangeable system (d) NONE

37. ...... is used to prepare a flexible joint between two shaft at a desired angle
(a) Cotter joint (b) Key joint (c) Knuckle joint (d) NONE

38. ..........is a sort of bolt without head . Its both ends are threaded but there is a plane portion also between the Two thread
(a) Cap screw (b) Set screw (c) Stud (d) NONE

39. A device used in mechanical production process which locates and clamps the workpiece and guide the tool is called
(a) Fixture (b) Template (c) Gauge (d) Jig

40. Which of the following property of metal is not a mechanical property?
(a) Elasticity (b) Toughness (c) Conductivity (d) Malleability

41. The property of a metal to be rolled or hammered without breaking or cracking in to thin sheets is called
(a) Ductility (b) Hardness (c) Elasticity (d) Malleability

42. Which one of the following is not a iron ore
(a) Magnetite (b) Hematite (c) Bauxite (d) Limonite

43. The process of softening and making machiable a hard and rough metallic job by means of heat treatment is called
(a) Hardening (b) Tempering (c) Annealing (d) Normalising

44. Which one of the following is not a natural abrasive
(a) Diamonds (b) Chorundum (c) Emery (d) Aluminum oxide

45. ............... can engage or disengage connections between Two parts of shaft or gears or pulleys mounted on them ,on one line
(a) Pulley (b) Gear (c) Clutch (d) Chain

46. Most rapid method of forming metal in to desired shapes by plastic deformation in between rolls is called
(a) Drawing (b) Piercing (c) Extrusion (d) Rolling

47. Hand tool used for cutting thin sheets is called
(a) Stakes (b) Scriber (c) Punch (d) Snipper

48. What is the angle of the angle plate?
(a) 30° (b) 45° (c) 65° (d) 90°

49. Coarse grade hacksaw blade have
(a) 14 to 18 teeth per inch
(b) 20 to 24 teeth per inch
(c) 24 to 30 teeth per inch
(d) 30 to 32 teeth per inch

50. Which one of the following is not a part of a combination set.
(a) Stock (b) Protractor head (c) Square head (d) Centre head