| 1. | If a is the angle subtended by two adjacent buckets in a Pelton wheel then the number of buckets is equal to ? | |
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40/a
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180/a
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270/a
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360/a
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View Answer
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Report Question| 2. | Choose the option which does NOT belong to the category of simple machine ? | |
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Spring
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Screw
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Wedge
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Pulley
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| 3. | Which of the following is TRUE for four bar mechanism ? | |
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All sliding pairs
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One is sliding pair and other is turning pair
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All turning pairs
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None of these
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| 4. | Which of the following is the CORRECT method for the conversion of spring controlled governor from unstable to stable ? | |
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Increasing the ball weight
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Decreasing the spring stiffness
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Decreasing the ball weight
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Increasing the spring stiffness
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| 5. | The power transmission takes place in shaft rotating at 400 rpm and this rotating shaft drives another shaft at 600 rpm. The smaller pulley has the diameter of 0.5 m. The centre distance between pulleys is 4m. If the angle of contact on the smaller pulley for the open belt drive is 1.8° then calculate the diameter of larger pulley (in m) and angle of contact (in rad) ? | |
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0.50 and 2.00
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0.75 and 2.00
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0.50 and 3.08
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0.75 and 3.08
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| 6. | Which of the following statement is CORRECT about the bull engine ? | |
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Obtained by fixing the cylinder or sliding pair
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Obtained by fixing the crank
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Obtained by fixing the piston rod
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None of these
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| 7. | Which of the following condition is CORRECT about the inversion of a mechanism ? | |
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Conversion of higher pair to lower pair
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Turning it upside down
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Obtained by fixing different links in a kinematic chain
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Obtained by reversing the input and output motion of the mechanism
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| 8. | Which of the following statement is INCORRECT about the dry clutch and wet clutch ? | |
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Heat dissipation is more difficult in dry clutch
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Rate of wear is very less in wet clutches as compared to dry clutches
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Torque transmitting capacity of dry clutch is less than wet clutch
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Engagement in wet clutch is smoother than dry clutch
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| 9. | Which of the following toothed wheels does not come under the classification according to the type of gearing ? | |
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External gearing
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Internal gearing
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Rack and pinion
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Parallel gearing
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| 10. | The profile of the gears is involute with 200. If the length of the path of approach and length of path of recess are 28 mm and 25 mm respectively. What is the length of arc of contact? (cos20°=0.94) ? | |
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54
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54.4
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56
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56.4
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