During complete combustion which of the following is produced:

In heat pump electricity is used to generate heat:

Most atmospheric injection burners operate efficiently on _______ of the theoretical value

Fuel heating value of Natural gas will be in the range of ______ Btu/ft^3

The speed of burner motor will be in the range of 1600 to 3600 rpm

_______ denotes the percentage of fuel burned and turned into heating energy:

Smoky combustion indicates poor _______ performance

Optimum excess air required in case of pulverized coal firing method will be about:

Which of the following gas is not a constituent of Natural gas:

The oil-pressure regulator on the fuel pump is generally factory-set to give nozzle oil pressures of _______

A clad cell relay uses _____ wire to supply line voltage to the relay:

In which of the following Vent installations, combustion air is taken from indoors and flue gases are discharge outdoors:

Which of the following are required proper combustion:

Flue gas temperature measures which of the following:

Which of the following is not the product of complete combustion: