61.
Coke is produced by

62.
A throttle governed steam engine develops 15 kW with 280 kg per hour of steam and 35 kW with 520 kg per hour of steam. The steam consumption in kg per hour when developing 20 kW will be nearly

65.
Pick up the correct statement as regards Cornish boiler and Lancashire boiler

68.
The efficiency of a boiler is defined as

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