169. Which of the following is not a flexible coupling
A.UniverSal
B.Bushed pin
C.Muff
D.Oldham's

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170. Length of cross belt, in addition to centre length, depends
A.Only on the sum of the radii of pulleys
B.On the sum and difference of the ra'dii _ of the pulleys
C.Square of difference of radii of_the pulleys
D.Square of sum of radii of pulleys

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171. The coefficient of friction between pulley and belt is reduced by 50%. If initial ratio of tension in belt was 5' then new value will be
A.5
B.None of the above.
C.10
D.1.25

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172. -Length of open belt, in addition to centre length, depends
A.Only on the sum of the radii of pulleys
B.On the sum and difference of the radii of the pulleys
C.Square of difference of radii of pulleys
D.Square of sum of radii of pulleys

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173. Abbreviation P.I.V. drive stands for
A.Positive, infinitely variable drive
B.Positive, independently variable drive
C.Purely, incremental variable drive
D.Purely, integral variable drive

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174. The centrifugal tension in belts
A.Reduces power transmission
B.Increases power transmission
C.Does not affect power transmission
D.Increases power transmission upto certain speed and then decreases

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175. The belting can transmit maximum power when maximum total tension in belt equals
A.Twice the centrifugal tension
B.Thrice the centrifugal tension
C.Four times the centrifugal tension
D.Centrifugal tension

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