36. During the welding or weld interval, when a welding current is flowing the system is said to be at a.weld intervalb. cool subintervalc. heat subintervald. hold interval 37. The portion of the weld interval during which the current is absent 38. After the welding interval, it goes to _________ interval wherein the electrode pressure is maintained on themetal surfaces. 39. Next to hold interval is __________ interval in automatic welding system. 40. After the release interval in automatic welding, the system will go to a.cool intervalb. squeeze intervalc. standby intervald. hold interval 41. Refers to the system that has no feedback and is not self correcting 42. The system is ____________ if a position servo system does not respond to small changes in the input. 43. What do you call a circuit or system that is self-correcting? 44. Open-loop in control system means: a.it has no feedbackc. it is not self-correctingb.it is not self-regulatingd. all are correct 45. In control system, closed-loop means: 46. When a closed-loop system is used to maintain physical position it is referred as 47. In closed-loop system, what do you call the difference in the measured value and the set value or desiredvalue? 48. A good closed-loop control system has the following characteristics a.with very small offset signal or voltagec. quick responseb. highly stable d. all are correct 49. The __________ are two of the most common mechanical configuration of industrial robots. 50. One advantage of hydraulic actuator in industrial robots include _____________. 51. ____________ includes tow of the actuator type used in industrial robots.
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