37. Blowouts are connected in series with the contacts. (True/False) 38. Worn contacts should always be replaced in pairs. (True/False) 39. The contactor shown in Figure 6-9 would be classified as a type. Figure 6-9 Contactor for Question 39. 40. A vacuum provides a better environment than free air for breaking the arc produced by opening contacts under load. (True/False) 41. A vacuum contactor does not use a coil to operate the contacts. (True/False) 42. Contactor auxiliary contacts have a current rating much higher than that of the main contacts. (True/False)

37. Blowouts are connected in series with the contacts. (True/False) 38. Worn contacts should always be replaced in pairs. (True/False) 39. The contactor shown in Figure 6-9 would be classified as a type. Figure 6-9 Contactor for Question 39. 40. A vacuum provides a better environment than free air for breaking the arc produced by opening contacts under load. (True/False) 41. A vacuum contactor does not use a coil to operate the contacts. (True/False) 42. Contactor auxiliary contacts have a current rating much higher than that of the main contacts. (True/False)

Understanding Motor Controls

4th Edition

ISBN:9781337798686

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter15: Flow Switches

Section: Chapter Questions

Problem 3RQ: Refer to the circuit shown in Figure 15-2. Why is there an overload contact symbol shown in series...

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