Mechanics of Textile Machinery (MCQ : MODULE 6- Gear Trains )

 

Question 1: A simple gear train has four gears (termed as 1, 2, 3 & 4 from input to output). The numbers of teeth on the gears in that order z1, z2, z3 & z 4 are 20, 30, 40 & 50 respectively. The ratio of angular speed of output to input gears is

1.0
0.8
0.6
0.4

Question 2: A compound gear train shown in Fig. 5.3 has four gears (termed as 1, 2, 3 & 4 from input to output). The numbers of teeth on the gears in that order z1, z2, z3 & z 4 are 20, 30, 40 & 50 respectively. The ratio of angular speed of output to input gears is

0.4
0.533
1.875
1.0

Question 3: A gear train having the input and output gears mounted on the same axis is called

Reverted
Epicyclic
Compound
Simple

Question 4: The output of an epicyclic gear train used in roving machine is proportional to

Flyer rpm
Winding rpm
Bobbin rpm
Rpm of bobbin and winding

Question 5: The inputs to the epicyclic gear train used in roving machine are

Scaled up angular speeds of winding and bobbin
Scaled down angular speeds of winding and bobbin
Scaled up angular speeds of winding and flyer
Scaled down angular speeds of winding and flyer

Question 6: Nips per minute of a comber is x and the length of fibre fringe moved during fast forward, fast backward and slow forward movement of fringe per nip are a, b and c respectively. When the nips per minute is doubled, what will be the delivery rate of fringe per nip

2a-b+c
2a+2b+2c
2a-2b+c
2a-2b+2c

Question 7: When the nips per minute of a comber is 480, then the duration of time (in seconds) for backward movement of fibre fringe is

1/32th
1/16th
1/8th
None of the above

 

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