Engine: Motor Plants and Auxiliary Boilers

1. A photoelectric, explosive gas indicator, for use in high-speed, two-stroke, trunk type piston engines
2. B comparator type mist detector for large low-speed, crosshead type engines
3. C rotary type mist detector, designed for use in four-stroke, high-speed diesel engines
4. D level type explosimeter, for small medium-speed, trunk type piston engines

Tip: press A-D to answer