| 1. | The train value of a gear train is ? | |
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equal to velocity ratio of a gear train
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reciprocal of velocity ratio of a gear train
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always greater than unity
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always less than unity
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Report Question| 2. | When the nature of contact between the elements of a pair is such that one element can turn about the other by screw threads, the pair is known as a ? | |
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screw pair
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spherical pair
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turning pair
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sliding pair
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| 3. | The radial distance of a tooth from the pitch circle to the bottom of the tooth is called ? | |
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dedendum
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addendum
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clearance
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working depth
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| 4. | Frequency of vibrations is usually expressed in ? | |
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number of cycles per hour
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number of cycles per minute
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number of cycles per second
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none of these
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| 5. | When the nature of contact between the elements of a pair is such that it can only slide relative to the other, the pair is known as a ? | |
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screw pair
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spherical pair
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turning pair
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sliding pair
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| 6. | The maximum frictional force, which comes into play, when an body just begins to slide over the surface of the other body, is known as ? | |
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static friction
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dynamic friction
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limiting friction
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coefficient of friction
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| 7. | The load cup of a screw jack is made separate from the head of the spindle to ? | |
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enhance the load carrying capacity of the jack
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reduce the effort needed for lifting the working load
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reduce the value of frictional torque required to be countered for lifting the load
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prevent the rotation of load being lifted
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| 8. | The centrifugal tension in belts ? | |
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increases power transmitted
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decreases power transmitted
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have no effect on power transmitted
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increases power transmitted upto a certain speed and then decreases
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| 9. | In a steam engine, the link constitutes a ? | |
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piston, piston rod and crosshead
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connecting rod with big and small end brasses, caps and bolts
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crank pin, crankshaft and flywheel
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all of the above
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| 10. | In gears, interference takes place when ? | |
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the tip of a tooth of a mating gear digs into the portion between base and root circles
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gears do not move smoothly in the absence of lubrication
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pitch of the gears is not same
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gear teeth are undercut
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