Stairs about emergency lighting switches are all on the first floor

Generally speaking, it is on the first floor, and it is generally installed like this, and it is rare to have this kind of installation on every floor.

Staircase emergency lighting switches are generally more on the first floor, but there will be a related switch on the passage on each floor, which is more safe and scientific.

Under normal circumstances, the staircase about the emergency light lighting animation is on the first floor, because there are a lot of things on the first floor, and the emergency is moving, and it is more convenient for them to specialize on the first floor.

In the case of this emergency light, the switch is generally available on every floor, because his emergency light is convenient for everyone to use in an emergency.

This one is not necessarily set on the first floor, but on the top floor. There are even prototypes that have separate on/off controls for each game.

The reason for the elevator stairs is even the switch. to the first floor. It's a must. From the first floor to the top floor, there must be a zhaoming! If you don't do that, you won't be able to.

The emergency light switch on the staircase should have an emergency light switch on each floor, and the main switch should be next to the meter box on the first floor.

It's fine, because one of its emergency light switches is located on the first floor.

The floor plan refers to the light points of the staircase on this level, as well as the light points of the intermediate tread platform.

The emergency light of the staircase is switched on and off.

It's definitely all on the first floor, and the first floor is where the main switch is.

This is not necessarily, there are many emergency switches that are available on every floor, which is decided according to the developer's design.

a. At this time, the circuit is in the disconnected state, the bulb can not emit light, when the s2 is wrenched, the circuit is in the closed state, and the bulb emits light; When S1 is pulled again, the circuit is in a disconnected state again, and the bulb cannot emit light, which is in line with the topic

b. The zero line first enters the switch, and then enters the bulb, and the live wire directly enters the bulb, which does not conform to the principle of safe electricity use and does not meet the topic

c. At this time, the circuit is in a disconnected state, the bulb does not emit light, and when the s1 is triggered, the circuit forms a short circuit in the power supply, and the wire will be burned out, which does not meet the topic

D. At this time, the circuit is in a closed state, the bulb is illuminated, when the s2 is wrenched, the circuit is in a disconnected state, the bulb can not emit light, and when the s1 is wrenched, the circuit is still in the disconnected state, and the bulb cannot emit light, which does not meet the topic

So choose A

1. Management objectives such as quality, schedule, cost, safety, environmental protection and energy conservation of the project.

2. The maximum number of people to be invested and the average number of people.

3. Subcontracting plan, labor use plan, material plan, machinery and equipment plan.

4. Construction procedures.

5. Overall arrangement of project management.

The situation of the construction deployment should be clearThe construction deployment of major issues affecting the whole system and decision-making, mainly should clarify the division of labor and organizational arrangements of construction tasks, determine the main content of the preparatory work, and formulate the construction procedures of the main project, auxiliary engineering, auxiliary engineering and the construction plan of the main branch project.

The construction deployment should be based on the scale of the construction project, the nature of the project, the objective conditions of the construction, and the need to put into operation, and make overall arrangements for the construction and delivery of all projects. Clarify the tasks, objectives and main directions of each construction stage. Organize balanced construction, do not rush to work, do not work in a hurry, do not work in a nest, overcome the difficulties brought by the season, and give full play to the subjective initiative of manpower.