In positive contact clutches, power transmission is achieved by means of friction.
a) Yes
b) It is achieved by shear contact
c) Major part is achieved by friction
d) None of the listed
Answer: b
Explanation: Power transmission is achieved by interlocking of jaws or teeth.
The jaw clutches show great amount of slip.a) Yesb) Zero slipc) Used in non-synchronous applicationsd) None of the listed
Is it possible to reduce the centre distance as much as we want?a) Yes power transmission increasesb) Noc) Can’t be citedd) None of the listed
The coefficient of friction is high in multi disk plate clutch.a) Yesb) Coefficient of friction is lessc) Coeffficient of friction is highd) None of the listed
Multi disk clutches are dry clutches.a) Plasma clutchesb) Wet clutchesc) Yesd) Depends on the lubrication used
The optimum velocity of the belt for maximum transmission is given by √P/6m.a) Yesb) No, by replacing 6 by 3c) Replacing 6 by 9d) None of the listed
Chain saws, lawnmowers, golf carts etc. never use centrifugal clutches.a) Trueb) No, it is highly usedc) Depends on the load requiredd) None of the listed
Which of the following can be used for power transmission in intersecting shafts.a) Spur Gearb) Helical Gearc) Bevel Geard) None of the listed
Eddy current clutch is a type of friction clutch.a) Yesb) No, it is an electromagnetic type clutchc) It is a mechanical clutchd) None of the listed
The layout of a shaft supported on bearings at A & B is shown. Power is supplied by means of a vertical belt on pulley B which is then transmitted to pulley C carrying a horizontal belt. The angle of wrap is 180’ and coefficient of friction is 0.3. Maximum permissible tension in the rope is 3kN. The radius of pulley at B & C is 300mm and 150mm. Calculate the torque supplied to the shaft.a) 453.5N-mb) 549.3N-mc) 657.3N-md) None...
The layout of a shaft supported on bearings at A & B is shown. Power is supplied by means of a vertical belt on pulley B which is then transmitted to pulley C carrying a horizontal belt. The angle of wrap is 180’ and coefficient of friction is 0.3. Maximum permissible tension in the rope is 3kN. The radius of pulley at B & C is 300mm and 150mm. Calculate the tension in the rope of pulley C.a) 6778.3N and...