1. 8749. What are the four general types of fuel quantity gauges? 1. Sight glass. 2. Mechanical. 3. Electrical. 4. Electronic. 5. Bourdon tube. 6. Vane-type transmitter. 7. Litmus indicator. 8. Direct-reading static pressure type. A. 1, 2, 3, 4. B. 1, 3, 6, 8. C. 2, 3, 5, 7.