Mechanics of Textile Machinery (MCQ : MODULE 9- Clutches )

Question 1: Loose and fast pulley are being replaced by

Multiple plate friction clutch
Conical clutch
Centrifugal clutch
Single plate friction clutch

Question 2: Which one of the following clutch is a positive contact clutch

Centrifugal clutch
Single plate
Spiral jaw clutch
Electromagnetic clutch

Question 3: Sintered-metal friction materials are characterized by

Higher wear and temperature resistances than asbestos based materials
Lighter and cheaper than asbestos based materials
Constant friction coefficient over wide temperatures
All of the above

Question 4: Which one of the following statement is wrong?

Multi-disk friction clutches are preferable for high power transmission and used in bale opener
Square jaw clutch has high power transmission capacity and used for driving bobbin carriage in roving machine
Conical clutch have high power transmission capacity and used to drive bobbin carriage in roving machine
Single plate friction clutch is used for driving tappet shaft in loom

Question 5: A multiple disk friction has three driver disks and two driven disks. If the number of driven disks are increased to three, then the torque transmission capacity would increase by

25%
33%
20%
None of the above

Question 6: When the engagement speed of a centrifugal clutch has to be increased from 500 to 1000 rpm, then

The number of shoes must be increased by a factor of four
The number of shoes must be increased by a factor of two
The spring constant must be increased by a factor of four
The spring constant must be increased by a factor of two

Question 7: A conical clutch having friction lining material, actuating force and radii of friction disks identical to a single plate friction clutch would have higher torque transmission capacity

By a factor ~ 2.0
By a factor ~ 2.5
By a factor ~ 3.5
By a factor ~ 4.5

Question 8: he observation of bevel gears mounted on horizontal shaft of bobbin carriage drive mechanism in roving machine during running is that

They always rotate in the same direction
They always rotate in opposite directions
One gear rotates while the other will be at rest
The above observations are not correct

Question 9: Choose one of the correct statements given below:

During over loading, mechanical clutches slip and safeguard the motor
Constant wear theory is used to find power transmission of new plate clutches
Constant pressure theory is used to design plate clutches
Centrifugal clutches requires least maintenance compared with plate clutches

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