Question 1: Match the pairs

A.Characteristic feature of projectile propulsion system	1. Timing of release of picking energy
B.Cam in projectile propulsion system	2. Generation of energy and timing of energy release
C.Co-linearity of torsion lever, connecting link and toggle lever	3. Locking of generated energy
D.Location of antifriction bowl on picking cam	4. Phase difference in generation and transmission of energy

(A1, B3, C4, D2)
(A4, B2, C3, D1)
(A2, B1, C4, D3)
(A2, B3, C4, D1)

Question 2 : Match the pairs

A.Potential energy in torsion rod	1. About 80 of loom shaft
B.Kinetic energy of gripper	2. Gripper velocity in free flight
C.Heat energy in plunger	3. Unused picking energy
D.Accelerating time for gripper	4. Product of Torque and angular distortion

(A3, B1, C4, D2)
(A2, B4, C3, D1)
(A2, B1, C4, D3)
(A4, B2, C3, D1)

Question 3 : Same projectile propulsion system can be employed for looms of higher reed width and WIR because

Wider looms run with lower rpm and therefore a gripper can cover a larger distance with same velocity
Availability of a greater accelerating time due to reduced loom rpm permits a higher gripper velocity which is required for wider looms that run with higher WIR.
The kinetic energy of a gripper is very high and much of it is anyway wasted through braking. Hence a free flying gripper can cover varying distances without needing any changes in picking system

 

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