MECHANIC AGRICULTURE MACHINERY, MECHANIC MOTOR VEHICLET THEORY

SEMESTER -1

1. During disposal of toxic dust or while spray painting the mechanic must use
a. Safety helmet b. Safety shoes c. Mask or respirator d. Goggles
2. While. extinguishing fire never use water on
a. Solid fire b. Electric fire c. Semi-solid fire d. Liquid fire
3. While working with acid, if it splashed into the eye, the first-aid for the injury is to wash eye with

a. Ammonia solution
b. A saturated solution of bi-carbonate soda
c. 5% solution of bi-carbonate soda followed by warm water
d. Clean water only
4. The human factors which may cause accident in workshop are
a. Worry and anger c. Improper attitude
b. Low attention to work and Illness d. All of these
5. Hammers are classified according to
a. Shape b. Shape and size c. Shape, size and use d. None of these
6. The punching end of centre punch is ground to an angle of... ..
a. 1000 b. 900 c. 700 to 900 d. 900 to 1000
7. Try square is used for..
a. Checking squareness of two adjacent faces of the work
b. Checking flatness of a surface
c. Making lines which are parallel to each other
d. All of these
Contd... ..2/
-2-
8. Allen bolt which is opened with the help of Allen key is generally used...
a. Where space is very less
b. At any place
c. Where more tightening torque is required
d. Where less tightening torque is required
9. For cutting Key-ways which type of chisel is used?

a. Flat chisel c. Round nose chisel
b. Cross cut d. Diamond point chisel

10. Which of the following is not a Power tool?

a. Bearing Puller c. Air ratchet
b. Air Impact Wrench d. Pneumatic drilling machine
11. Which pliers are used by carpenters for removing nails?
a. Side cutting pliers c. Pincer pliers
b. Nose pliers d. Slip Joint pliers

12. Least count of metric micrometer is

 a. O. Imm b. 0.01mm c. 0.001mm. d. 0.0001mm.
13. The instrument which is used to measure internal dimension, external dimension and depth is known as
a. Micrometer b. Vernier caliper c. Telescope gauge d. Dial bore gauge
 14. To check the valve tappet clearance, spark plug gap, piston ring gap which gauge is used?
a. Screw gauge c. Thread pitch gauge
b. Dial gauge d. Feeler gauge
  15. In Automobile and Agricultural machine the parts which are subjected to stress and vibration, are tightened with
a. General Purpose bolt c. Ordinary bolt

b. High tensile bolt d. High tensile screw
16. Where there is lot of vibration, castle nut is tightened on the bolt and locked with the help
a. Cotter pin or split pin   c. Spring lock washer
b. Plain washer de Internal tooth lock washer
17. The bolt which does not have head and has threads on both ends is called..
a. Cap screw b. Fastening bolt c. Stud d. Machine screw
18. The hacksaw blade is made of.. . .
a. Low carbon steel c. High carbon steel


b. Medium carbon steel d. High speed steel
Contd...... .3/-

19. Draw filing is necessary to bring the job to exact size, which is to be done with the help of
a. Smooth or dead smooth file c. Bastard file
b. Second cut file d, Rough file
20. Which of the safety precautions to be followed by the worker while using grinding  machine?
  a. Observe, the stones are running correctly without any vibrations  b- Worker must use goggles
 c. Tool to be sharpened is to be kept on adjustable rest and held by hand.
d. All of these
21. Which is not a type of fit?
a. Interference b. Bilateral c. Transition d. Clearance
22. A non-metallic gasket should not be used for pressure in excess of about Kg. / cm 2.
a. 65 b. 75 c. 85 d- 95
23. The amount of variation permitted from the specified dimensions in the manufacture of a part is called
a. Limits b. Allowance
24. For a twist drill bit the angle of twist is   c. Tolerance d. Nominal size
a. 500 b. 590 c. 600 d. 690
25. Flutes are provided on drill to .
a. Ensure correct cutting angle
b. Give suffcient clearance for cutting material to flow out of the hole
c. Both (a) & (b)
d. To ensure flow of coolant
26. For making a bigger hole
a. Never use coolant

b. It is always advantageous to drill a pilot hole of smaller size
c. Never use goggles
d. No need to mark the drilling position with the centre punch.
 27. Which of the following statement is correct?
a. Always hold the tap perpendicular to the job
b. Always give drive to tap 1/4 turn forward only
c. Never use oil or water to keep tap cool.

d. While making thread, tap should not be taken out till the threading is complete

Contd..... ...4/
T) -4.
 28. The tool used for making internal thread in a job is called

a. Tap b. Die c. Thread gauge d. Drill
29. In Automobile shop mostly which type of reamer is used?

a. Taper straight flute c. Taper parallel
b. Morse taper d. Expanding type
30. Stakes and stake holder are some special tools used for .
a. Soldering work, c. Welding work
b. Brazing work d. Sheet metal work
31. Cutting of sheet metal by two parallel cutting edge moving in opposite direction is termed as
a. Drawing b. Swaging c. Shearing
32. Which sheet. metal joint makes the sheet leak proof? d. Piercing
a. Lap joint b. Seam Joint c. Lock Joint
   33. The percentage of lead in solder is d. Cap Joint
d. 60%
34. In brazing operation, brazing starts at a temperature of about

a. 6000 0 b. 5500C c. 4500 c d. 2500C
35. If 'd' is the diameter of a rivet, then the maximum pitch (distance between two adjacent rivets centre) for a riveted joint is calculated by
a. 2d + 6mrn. b. (d+30) mm. c. 3d mm. d. 4d mm-
36. "The current flowing in an electric circuit is directly proportional to the voltage applied to  the circuit"
The statement is known as low.


a. Ohm's b. Faraday's  c. Fleming's d. Mho's
37. An electrical motor has power output of 1 KW. What is the value in Horse Power?
a. 1.5 hp b. 2.34 hp d. 1.34 hp
38. Resistance of any conductor is inversely proportional to the conductor's
a. Cross — sectional area b. Length c. Material d. Position.
39. An additional resistance introduced in series with the primary coil of ignition coil to    regulate the current flowing in the primary winding is called-
a. Ballast resistance c. Parallel resistance
b. Variable resistance d. Circuit breaker
 40. In automobile electrical wiring black cable is used for
a. Battery circuit c, Earth circuit

b. Ignition Circuit d. Side & tail lamp circuit
 Contd... .5/-
-5-
41. The active material for negative plate of lead acid battery is
a. Lead peroxide b. Pure lead c. Lead — antimony d. Lead and tin
 42. The specific gravity of electrolyte for a fully charged lead acid battery is   270c.
a. 2.173 b.' 1.173 c. 2.273 d. 1.273
43. Deposition of hard sulphate (SOD on the positive and negative plates when the battery is

left unattended after fully discharge is called
a. Sulphation b. Hydration c. Stratification d. Buckling
44. Which of the following electronic components have been found useful for the purpose of   rectifying AC into DC?
a. Transistors b. Diodes c. Thyristors d. OR - gate
45. Single — V and Single — U butt welds are generally used for sheet metal thickness of about
a. 30 to 40 mm. b. 25 to 30 mm. c. 15 to 25 mm. d. 5 to 15 mm.
46. In oxy—acetylene gas welding the neutral flame is obtained by mixing equal quantities of oxygen and acetylene, which is suitable for welding all metals except  a. Brass b. Copper c. Aluminium d. Ferrous metals
47. In arc welding machine the arc maintenance voltage is of the order of

a. 60 — 100 volts b. 25 - 40 volts c- 50 — 60 volts d. Above 100 volts
48. To improve the machineability of low carbon steel which of the following heat treatment is preferred?
a. Hardening b. Tempering c. Normalizing d. Refining
49. To obtain a hard and wear resistant surface which of the following heat treatrnent is

given?
 
a. Tempering b. Normalizing
50. Hydraulic system works on the principle of c. Refining  

  d. Case Hardening
a. Boyle's Law b. Charles's Law c. Pascal's Law d. Ohm's Law