During the welding or weld interval when a welding

36. During the welding or weld interval, when a welding current is flowing the system is said to be at
a. weld interval b. cool subinterval c. heat subinterval d. 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 the
metal 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 interval b. squeeze interval c. standby interval d. 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 feedback c. it is not self-correcting
b. it is not self-regulating d. 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 desired
value?
48. A good closed-loop control system has the following characteristics
a. with very small offset signal or voltage c. quick response
b. 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.