What are the two types of high tension lead connections used in ignition systems?

The correct answer identifies the two principal types of high tension lead connections found in ignition systems: the exposed clip type and the boot type.

The exposed clip type connection features a metal clip that attaches directly to the ignition coil, providing a secure electrical connection. This type is typically used in applications where access to the connection is straightforward and where robust performance is necessary, as it allows for easy replacement and good conductivity.

On the other hand, the boot type connection involves a rubber or plastic insulator that houses the metal terminal inside a protective boot that connects to the ignition coil. This design helps to prevent moisture and dirt from interfering with the electrical connection, making it a preferred choice for many automotive applications where longevity and reliability in varying environmental conditions are crucial.

These two connections are essential in ensuring that the electrical signals for ignition are transmitted effectively from the ignition coil to the spark plugs, leading to reliable engine performance. Other options discussed, like circular and angular types, focus more on the shape rather than the connection type, while threaded and non-threaded variations concern fastening mechanisms rather than connection methods per se. Solid core and shielding types relate more to the design of the leads as a whole rather than specific connection types at the coil or spark plug.