In a 3-phase synchronous motor type tachometer indicator: 1. The transmitter is a direct current generator.2. The voltage is proportional to the transmitter drive speed. 3. The frequency is proportional to the transmitter drive speed.4. The speed indicating element is a galvanometer.5. The speed indicating element is an asynchronous motor driving a magnetic tachometer.The combination regrouping all the correct statements is:

1) A manifold pressure gauge of a piston engine measures:

2) The temperature measured by the CHT (Cylinder Head temperature) probe is the:

3) A synchroscope is used on aircraft to:

4) In a 3-phase synchronous motor type tachometer indicator: 1. The transmitter is a direct current generator.2. The voltage is proportional to the transmitter drive speed. 3. The frequency is proportional to the transmitter drive speed.4. The speed indicating element is a galvanometer.5. The speed indicating element is an asynchronous motor driving a magnetic tachometer.The combination regrouping all the correct statements is:

5) On an aeroplane equipped with a constant speed propeller, the RPM indicator enables: