Steam Boilers, Engines, Nozzles and Turbines
A compound steam engine in which the high pressure and low pressure cylinders have common piston rod, is called

Tandem type compound engine
Woolf type compound engine
Receiver type compound engine
None of these

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Steam Boilers, Engines, Nozzles and Turbines
Spontaneous combustion is a phenomenon in which

Explosion in furnace
All the fuel burns instantaneously producing high energy release
Coal bursts into flame without any external ignition source but by itself due to gradual increase in temperature as a result of heat released by combination of oxygen with coal
Fuel burns with less air

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