How do the following circuits in a carburetor work: float circuit and choke?
What will be an ideal response?
The float circuit works the same way that a toilet does; when the level of fuel rises to a predetermined level, the float closes a needle valve against its seat, stopping further flow from the fuel pump. As the engine uses fuel the float level drops, opening the needle valve and allowing fuel to flow in again from the pump. The float level is important. If it is too high, the air-fuel mixture will be too rich; if too low, the mixture will be too lean.
The choke is a butterfly valve like the throttle valve located in the top of the carburetor. When it is "closed," incoming air is restricted, causing a rich airfuel mixture to help the engine run better when cold.
You might also like to view...
What are five major criteria used in the selection of a cultivar?
What will be an ideal response?
The saw shown in the figure above is called a _____
a. keyhole saw b. drywall saw c. coping saw d. hacksaw
Studs are the vertical construction members used for framing walls and partitions, and the nominal size of the construction member before milling is 2 X 4 or 2 X 6.
Answer the following statement true (T) or false (F)
A standpipe system shall be subjected to a hydrostatic pressure test, and also a flow and pressure test, to demonstrate its suitability for Fire Department use. These tests shall be conducted
A. at least once in two years B. at least once in five years C. at least once a year D. at least once in three years