【Daily Topic】【Electrical Edition 20170310】
Thread Content
Participation reward: 2 Wealth. Correct reward: 8 Wealth. Multiple-choice question: For a power-off delay relay, what is the operating behavior of its delay contacts? ( ) A. The contacts operate with a delay when the coil is powered, and instantaneously when it is de-energized. B. The contacts operate instantly when the coil is powered, and with a delay when it is de-energized. C. The contacts do not operate when the coil is powered, but operate instantly when it is de-energized. D. The contacts do not operate when the coil is powered, and operate with a delay when it is de-energized. B
For a power-off delay time relay, the operating behavior of its delay contacts is (B). A. The contacts operate with a delay when the coil is powered, and instantaneously when it is de-energized. B. The contacts operate instantly when the coil is powered, and with a delay when it is de-energized. C. The contacts do not operate when the coil is powered, but operate instantly when it is de-energized. D. The contacts do not operate when the coil is powered, but operate with a delay when it is de-energized