1. In a pneumatic telemetering system, explain how the air flow through a nozzle in a transmitter is varied. How does this variation cause a change in the signal to the receiver? 1. Sketch

1.      In a pneumatic telemetering system, explain how the air flow through a nozzle in a transmitter is varied. How does this variation cause a change in the signal to the receiver?

1.      Sketch and describe a variable inductance and a variable capacitance type of transducer. Discuss typical applications, with examples, of these devices in measuring or control systems.

2.      Describe a remote telemetering system. Detail on a suitable diagram both the indicator and receiver unit and the connections between them.

3.      Describe, with a suitable sketch, an electro-pneumatic converter. Explain the operation when subject to a change in input. State two applications of such a device.