( MECH - 01 )

QUESTION PAPER
LIMITED DEPARTMENTAL COMPETITIVE EXAMINATION - 2008
FOR THE POST OF CHARGEMAN-GR.II (T) & (NT)

SUBJECT: GENERAL ENGG & MECHANICAL ENGG CODE: 2.01 / 221

Sr. No. … … … … … … … … … … … … … ROLL NO.

Signature of the Invigilator … … … … … … … … … … … … … … …

Date: 19.10.2008 Duration : 3 Hours.

Time: 14:00 Hrs to 17:00 Hrs. Max. Marks : 100

Instructions: Please read the following instructions carefully before writing your answers:
1) All Questions in Part - A & Part - B are compulsory.
2) Each Questions in Part - A carries 1 mark and that in Part - B carries 5 marks.
3) There are four options - (A), (B), (C), (D) given against each question in Part - A out of which
only one is the most appropriate answer.
If (A) is correct, round on the correct option like (A)
4) The discarded answer if any, must be crossed properly and supported by initial of the
candidate.
5) In Part – A, for each wrong answer 0.25 marks will be deducted. If more than one
options are marked, it will also be considered as wrong answer.
6) Use only blue or black ball pen only. Use of Pencil is not allowed.
7) No sheet from the Question Paper / Answer Book should be detached.
8) You may do rough work, if required, on the blank sheets.
9) Please DO NOT repeat DO NOT write your name anywhere on the Question Paper /
Answer sheet. If name or any other symbolic notation are found marked on the
Question paper / Answer sheet, this will render the candidate disqualified.

For Examiners only

Part - A
Correct Wrong No Total
Answers Answers Answers (80)

Part - B
Q.81 Q.82 Q.83 Q.84 Total
(5) (5) (5) (5) (20)

SUMMARY OF MARKS OBTAINED

Part - A Part - B Total
Marks
(80) (20) (100)
Obtained
 ( MECH - 02 )
PART - A
(Each question carries 1 mark)

Q.1. Distance between points (3, –4) and (–3, 4) is:

(A) 6 (B) 8 (C) 10 (D) 12

Q.2. If x 128 ? 2, then x is:

(A) 4 (B) 5 (C) 6 (D) 7

3 5 3
Q.3. The value of ? ? is:
7 6 4
17 23 43 53
(A) (B) (C) (D)
42 42 84 84

Q.4. Least Common Multiple (LCM) of 30, 36, 48 & 60 will be:
(A) 480 (B) 640 (C) 720 (D) 960

Q.5. If LCM & HCF of two numbers are 672 & 6 respectively. If one number is 42 then the
other number is:
(A) 96 (B) 126 (C) 216 (D) 316

Q.6. The length of a room is 4 m, breadth is 3 m and height is 5 m. What is the volume of
the room:
(A) 60 m3 (B) 80 m3 (C) 60 m2 (D) 80 m2

Q.7. In a school, the ratio of boys and girls is 3:2. If the number of girls in the school is 80,
what is the total strength of school ?
(A) 200 (B) 300 (C) 400 (D) 100

Q.8. (a + b) (a - b) is equal to:

(A) a2 + b2 (B) a2 + b2 + 2ab (C) a2 – b2 (D) a2 + b2 – 2ab

Q.9. The distance BC in the figure is:

A

o o
) 30 ) 45
B C D
? 1 ? ? 3?
(A) AD ?1 ? ? (B) AD ( 3 – 1) (C) AD (1 – 3 ) (D) AD ?1 ? ?
? 3? ? 2 ?

Q.10. The electric resistance of a certain wire of iron is R. If its length and radius are both
doubled, then:
(A) The resistance will be doubled and the specific resistance will be halved
(B) The resistance will be halved and the specific resistance will be doubled
(C) The resistance will be halved and the specific resistance will be unchanged
(D) The resistance and the specific resistance will both remain unchanged
 ( MECH - 03 )

Q.11. A 10 kg object collides with a stationary 5 kg object and after collision they stick together
and move forward with velocity 4 m/s. What is the velocity with which the 10 kg object
hit the second one:
(A) 4 m/s (B) 10 m/s (C) 6 m/s (D) 12 m/s

Q.12. A light and a heavy body have equal momentum. Which one has greater Kinetic Energy
(K.E) ?
(A) The light body (B) Both have equal K.E
(C) The heavy body (D) Data given is incomplete

Q.13. The intensity of stress which causes unit strain is called:

(A) Unit stress (B) Modulus of rigidity
(C) Bulk modulus (D) Modulus of elasticity

Q.14. The value of cos(A + B) is:

(A) cos A . cos B + sin A . sin B (B) cos A . cos B – sin A . sin B
(C) sin A . cos B + cos A . sin B (D) sin A . cos B – cos A . sin B

Q.15. A reamer is used to correct the:

(A) Size and position of drilled hole
(B) Size and roundness of drilled hole
(C) Finish and position of drilled hole
(D) Finish and size of drilled hole

Q.16. ‘Water in an overhead tank’ is an example of:

(A) Kinetic energy (B) Potential energy
(C) Mechanical energy (D) None of the above

Q.17. The unit of density in MKS system is:

(A) l b / cu. ft. (B) gms / cu. metre
(C) gram / cc (D) Kg / cu. metre

Q.18. The maximum frictional force which comes into play when a body just begins to
slide over the surface of the other body is known as:
(A) Static friction (B) Dynamic friction
(C) Limiting friction (D) Coefficient of friction

Q.19. The unit of permitivity of free space (Eo) is:

(A) Coulomb2 / Newton ? metre2 (B) Coulomb / Newton ? metre
(C) Newton ? metre / Coulomb2 (D) Coulomb2 / (Newton ? metre)2

Q.20. A couple produces:

(A) Translatory motion (B) Rotational motion
(C) Both translatory & rotational motion (D) None of these
 ( MECH - 04 )
Q.21. Ability of material to resist deformation due to stress is known as:
(A) Toughness (B) Stiffness (C) Plasticity (D) Hardness

Q.22. Mechanical advantage is the ratio of:

(A) Output to Input (B) Force of friction to reaction force
(C) Load to effort (D) Force to resistance

Q.23. Ball bearings are generally made of:

(A) Cast iron (B) Carbon steel
(C) Stainless steel (D) Carbon chrome steel

Q.24. A special form of piercing in which the entire contour is not cut, is known as:
(A) Slotting (B) Notching (C) Trimming (D) Lancing

Q.25. Forging of plane carbon steel is carried out at ______ oC:

(A) 900 (B) 1100 (C) 1300 (D) 1500

Q.26. A four wheel drive has:

(A) No differential (B) Differential on rear side only
(C) Differential on front side only (D) Both front as well as rear differential

Q.27. What is the typical value of front clearance angle:

(A) 0o (B) 6o (C) 20o (D) 30o

Q.28. Kerosene is used as a coolant while machining:

(A) Mild steel (B) Cast iron (C) Stainless steel (D) Aluminium

Q.29. Reducing flame is obtained in oxyacetylene welding with:

(A) Excess oxygen (B) Equal parts of both gases
(C) Excess of acetylene (D) Reduced acetylene

Q.30. A micrometer screw has pitch of 0.5 mm and the thimble has 100 equal divisions marked
on it, the least count of instrument in mm is:
(A) 0.05 (B) 0.5 (C) 0.025 (D) 0.005

Q.31. Welding defect called “Arc blow”occurs in:

(A) Arc welding using AC current (B) Arc welding using DC current
(C) Gas welding (D) MIG welding

Q.32. The taper in lathe spindle is:

(A) 1 in 10 (B) 1 in 20 (C) 1 in 30 (D) 1 in 15

Q.33. Chamfering is essentially done after:

(A) Grooving (B) Turning (C) Facing (D) Thread cutting

Q.34. Oxygen to acetylene ratio in case of carburizing flame is:

(A) 0.5 : 1 (B) 0.9 : 1 (C) 1:1 (D) 1 : 1.2

Q.35. Preferred riveted joint is:

(A) Lap joint (B) Butt joint (C) Overlap joint (D) None of these
 ( MECH - 05 )
Q.36. Plug gauges are used to:
(A) Measure diameter (B) Check the diameter of holes
(C) Check length of holes (D) All of these

Q.37. One micron is equal to:

(A) 10-6 of a meter (B) 10-9 of a meter
(C) 10-6 of mm (D) None of these

Q.38. Endurance limit of a material determines one of the following properties:

(A) Max. ultimate tensile stress (B) Average stress
(C) Elongation (D) Limiting stress for continuous working

Q.39. A 20 tonne press implies that the:

(A) Weight of press is 20 tonnes
(B) Press can handle works weighing up to 20 tonnes
(C) It can exert pressure up to 20 tonnes
(D) Its turnover in a day is 20 tonnes

Q.40. Accuracy of Vernier Calipers is:

(A) 0.1 mm (B) 0.01 mm (C) 0.02 mm (D) 0.001 mm

Q.41. Pre heating before welding is adopted for minimising:

(A) Cracks after welding (B) Stress concentration
(C) Brittle joints (D) Wasting of welding rods

Q.42. Ability of tool material to retain its hardness, while working at high temperature is
known as:
(A) Wear resistance (B) Red hardness
(C) Toughness (D) None of these

Q.43. Combination set has all the features of:

(A) Try square (B) Bevel protector
(C) Rule and scriber (D) All of these

Q.44. Which of the following steels could be Induction hardened:

(A) C20 (B) C45
(C) 50CrV4 (D) 20mn CR5

Q.45. Anti Carburising is done through which of the following process:

(A) Phosphating (B) Nickel plating
(C) Copper plating (D) Zinc plating

Q.46. Stick slip occurs in between:

(A) Spindle and bearings (B) Bed & pedestal
(C) Slide & guideways (D) Work and cutting tool
 ( MECH - 06 )
Q.47. Martensite micro structure is obtained by following heat treatment:
(A) Annealing (B) Normalising
(C) Quenching (D) Stress relieving

Q.48. TIG welding process is used for welding materials:

(A) Mild steel (B) Cast iron
(C) Aluminium (D) Plastics

Q.49. A taper tap has:

(A) Full thread for whole length (B) Its end tapered for about 3-5
threads
(C) Its end tapered for about 8-10 threads (D) None of these

Q.50. Glazing of grinding wheel occurs due to:

(A) Wear of abrasive grains (B) Wear of bond
(C) Cracks on grinding wheel (D) All of these

Q.51. Bar of section can be cold bent by:

(A) Roll bending (B) Rotating die and wiper block
(C) Series of rolls (D) Matching shape wheels

Q.52. Corrosion resistance of steel increases by addition of:

(A) Vanadium, Alluminium (B) Tungsten, Molybdenum
(C) Chromium, Nickel (D) Sulphur, Phosphorus

Q.53. Which of the following is a ‘clearance fit’:

(A) Push fit (B) Sliding fit (C) Press fit (D) Force fit

Q.54. Drill check is used to grip:

(A) Parallel shank drill (B) Taper shank drill
(C) Flat drill (D) Fluted drill

Q.55. Standard tolerance unit is equal to:

0.45 D + 0.01 D
3
(A) (B) 0.45 D + 0.001 D
4
0.45 D + 0.02 D
3
(C) (D) 0.45 D + 0.01 D
where D is diameter in mm.

Q.56. Cutting angle of a chisel vary from:

(A) 20O – 25O (B) 35O – 70O (C) 50O – 80O (D) 3O – 5O

Q.57. Surface Finish are specified on drawings by symbol:

(A) Rectangle (B) Triangle (C) Circle (D) Square
 ( MECH - 07 )

Q.58. A sine bar cannot be used without:

(A) Screw gauge (B) Micrometer (C) Slip gauge (D) Angular gauge

Q.59. Indian standard system comprises following grades of fundamental tolerances:

(A) 18 (B) 16 (C) 20 (D) 14

Q.60. Which work holding attachment is used for milling hexagonal shape ?
(A) Magnetic chuck (B) Vice
(C) Dividing head (D) Rotary table

Q.61. The maximum hardenability of any steel depends on:

(A) The carbon content (B) The chemical composition
(C) The grain size (D) The alloying elements present

Q.62. Too low a feed rate in a milling machine would:

(A) Improve surface finish
(B) Cause cutter to rub and scrap the surface instead of cutting
(C) Consume less power
(D) Be best suited for softer materials

Q.63. Drilled holes and honed holes could be designated by following grades
respectively:
(A) H5, H11 (B) H10, P5 (C) H11, H8 (D) H6, H10

Q.64. Auto collimator is used for:

(A) Parallelism measurement (B) Flatness measurement
(C) Straightness measurement (D) Angular measurement

Q.65. Pickup the incorrect statement about Plano - miller:

(A) Cutting can be done on one side only
(B) Feed is given by moving the table
(C) In comparison to planning machine the table movement is slower
(D) Cutting can be done on three sides of work at the same time

Q.66. Thickness of clearance can be checked by:

(A) Filler gauge (B) Ring gauge
(C) Go & Not Go gauge (D) Any of these

Q.67. The term ‘Allowances’ in limits & fits is referred to:

(A) Minimum clearance between shaft and hole
(B) Maximum clearance between shaft and hole
(C) Difference between maximum and minimum size of the hole
(D) None of these
 ( MECH - 08 )

Q.68. Universal surface gauge is used for:

(A) Flatness testing (B) Layout work & inspection
(C) Profile of complex surface (D) Measuring surface roughness

Q.69. Grinding wheel is balanced frequently because of:

(A) High rpm (B) Random wear
(C) Etch wear (D) Frequent glazing

Q.70. The size of a lathe is expressed by:

(A) Diameter of chuck (B) Maximum speed of chuck
(C) Swing of lathe (D) Height of centre from bed

Q.71. Heavy and irregular jobs are turned on a lathe are held in:
(A) Three jaw chuck (B) Four jaw chuck
(C) Face plates (D) Between centres

Q.72. For drilling a hole in a soft material, the point angle is kept:
(A) More than normal 118o (B) More than 135o
(C) Less than 118o (D) None of these

Q.73. The grooves provided on the cutting teeth of the broaches are meant for:
(A) Chip clearance (B) Chip breaker
(C) Relief for uneven surface (D) Oil passage

Q.74. Welding of dissimilar materials like metals to non-metals uses the principle of:
(A) Ultrasonic (B) Friction welding
(C) Solid state bonding (D) None of these

Q.75. Anti friction linear motion guide ways are used in CNC machines in place of
friction guide ways to:
(A) Reduce stick slip (B) Have better damping properties
(C) Better support against vibration (D) All of these

Q.76. Coining is the process of:

(A) Cold forging (B) Hot forging
(C) Cold extrusion (D) Piercing

Q.77. Which one of the following methods can be used for turning external tapers only ?
(A) Compound rest (B) Tail stock offset
(C) Taper attachment (D) Form tool
 ( MECH - 09 )
Q.78. The speed of grinding wheel is limited by:
(A) Type of bond (B) Grinding operation
(C) Rigidity of grinding machine (D) All of these

Q.79. Profile of a gear tooth is to be checked. Which of the following device you would choose?
(A) Optical micrometer (B) Optical projector
(C) Telescopic gauge (D) Bench micrometer

Q.80. Backlash between gears is expressed in terms of:

(A) Difference between addendum and dedendum
(B) Difference between PCD of two gears
(C) The actual gear width on pitch circle minus standard gear width for given number
of teeth on gear
(D) Clearance between faces of the mating gears

PART - B
(Each question carries 5 marks)

Q.81. i) If tan A = 1, Prove that 2 sin A cos A = 1 ( Marks: 2 ½ )

ii) What is pressure? Give names of units in ( Marks: 2 ½ )

(a) FPS system
(b) CGS system
(c) MKS system

Q.82. Find the time required in minutes for one complete cut on a piece of work 350 mm long
and 50 mm in diameter. The cutting speed is 35 meters per minute and the feed is 0.5
mm per revolution.

Q.83. How a grinding wheel is selected ?

Q.84. On grinding wheel level marking as A46K 5V17, explain the meaning of symbols used
in marking.