| 1. | A jokey or idler pulley is provided in a belt drive to ? | |
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increase arc of contact
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increase belt tension
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decrease slackness
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all of the above
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Report Question| 2. | Main purpose of using worm and worm wheel drives in machine and the accessories is to __________ ? | |
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transmit large torque
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transmit higher speed
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provide large speed reduction from worm shaft to worm wheel
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provide large speed reduction from worm wheel to worm shaft
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| 3. | In spiral gears, gear ratio is 1:1 and the shaft angle is at _______ ? | |
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90°
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30°
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60°
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45°
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| 4. | Which are the positive drive transmission ? | |
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gear
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belt
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ropes
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all of the above
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| 5. | Which gear arrangement used to change the circular motion of horizontal to vertical without change in speed ratio ? | |
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two spur gear
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two helical gear
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two bevel gear
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worm &worm wheel
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| 6. | Which is the following is used for transmission of mechanical power ? | |
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chain
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belt
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coupling
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all of these
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| 7. | _______ can engage or disengage connection between two part or a shaft or gear or pulleys mounted on their on one line ? | |
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pulley
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gear
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clutch
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chain
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| 8. | Which of the following is a type of coupling ? | |
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universal coupling
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flange coupling
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hook coupling
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all of these
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| 9. | In which type of gear, the teeth are cut parallel to the axis of rotation ? | |
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helical gear
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spur gear
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bevel gear
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worm gear
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| 10. | Which one of the following is not correct in respect of v-belt drive ? | |
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it is compact
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it can be easily replaced and it's maintenance is easy
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it causes less noises and vibration
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it is used where distance between driver and driven pulley is more
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