Q.1. ( ) One of the shed opening systems in weaving machines, the dobby shed opening system gives less movement to the frame compared to the eccentric system.
Q.2. ( ) Dobby shedding system is divided into two as mechanical and electronic according to the reading of knitting movements.
Q.3. ( ) Five wefts are thrown in each revolution of the double stroke dobby machine.
Q4. ( ) Electronically controlled dobbies have magnetic control rods instead of cards or chains in mechanical dobbies.
Q.5. ( ) The other name of the dobby shedding system is the dobby plan.
Q.6. ( ) In the electronic dobby system, the magnetic blocks work in conjunction with the electronic pattern memory or directly with the microprocessor unit.
Q.7. ( ) The machine is started by attaching the eccentric plates of the knitting to the electronic dobby shedding system.
S.8.. ( ) In the electronic dobby shedding system, all movements are operated under control with a remote control.
Q.9.. ( ) Electronically controlled dobbies have magnetic cables instead of cards or chains in mechanical dobbies.
Q.10. ( ) Electronic dobby has settings such as timing adjustment of the dobby, setting of the closing angle, height of the mouthpiece.
Q.11. Which of the following is an incorrect statement for dobby shedding systems?
A) It is one of the mouth opening systems.
B) It is divided into mechanical and electronic.
C) It is the system that works with the least number of frames.
D) 48 frames can be worked according to special needs.
Q.12. What are the types of dobby according to the way it moves?
A) Positive, negative dobbies
B) Single stroke, double stroke dobbies
C) Top rim, lower rim dobbies
D) Single eccentric, double eccentric dobbies
Q.13- Which of the following is not a part of the mechanical dobby?
A) Log B) Pattern cardboard C) Knives D) Mallion threads
Q.14. What are the dobby types used in the looms that were first produced in the mechanical dobby system before the pattern cardboard?
A) Plastic and iron nailed dobby B) Electronic dobby C) Eccentric dobby D) Magnetic dobby
Q.15. Which of the following is not one of the electronic dobby settings?
A) Timing adjustment of the dobby B) Closing angle adjustment C) Mouthpiece height adjustment D) Adjustment of sinkers
Q.16. Which of the following is related to electronic dobby?
A) Mallion threads B) Magnetic blocks C) Eccentrics D) Mortar board
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