Q.47 _____It is a cylindrical part closed at one end which maintains a close sliding fit in the
engine
cylinder.
a) Cylinder b) crankshaft c) camshaft d) Piston
Q. 48. The average force a bullock can exert is nearly equal to ______of its body weight.
a) one half b) one third c) one tenth d) one fifth
Q. 49. According to land holding marginal farmers comes into ______ hectare land.
a) less than 1 b) less than 2 c) less than 3 d) less than 5
Q. 50) Fly wheel is made of ________.
a) cast iron b) mild steel c) soft centre steel d) cast steel
Q. 51 The speed of camshaft gear is ______ speed of crankshaft gear.
a) half b) double c) four times d) six times
Q. 52. The following adjustments that are done on the disk ploughs to control the depth or
width of ploughing or to increase the pulverization.
a. By increasing the tilt angle, penetration is improved.
b. By increasing the disk angle, penetration is improved but the width of cut is reduced.
c. By adding weights to the plough, penetration can be increased.
d) All of the above
Q. 53. Calculate the area covered per day of 8 hours by a tractor drawn four bottom 35cm plough if
the speed of the ploughing is 5kmph, the time lost in turning is 10%.
a) 0.50 ha b) 5.04 ha c) 50.4ha d) 0.05ha
Q. 54. Purpose of lubrication is ______.
a) Reducing frictional effect b) Cooling effect
c) Sealing effect d) All of the above.
Q. 55.________ are those engines, in which heat is conducted from the working components
of the engine to the atmosphere directly.
a) Air cooled engines b) Water cooled engine c) Both a and b d) None of the
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Explanation:
area=9×4
=36m
if it was 3 m
curtains would have been cut =36÷3
=12
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