The efficiency of a modern boiler using coal and heat recovery equipment is about_____________?

A. peak load plant
B. base load plant
C. standby plant
D. none of the above
Base Load and Peak Load power plants
Power plants are categorized as base load and peak load power plants.
Base Load Power plants:
Plants that are running continuously over extended periods of time are said to be base load power plant.
The power from these plants is used to cater the base demand of the grid. A power plant may run as a base load power plant due to various factors (long starting time requirement, fuel requirements, etc.).
Examples of base load power plants are:

 
Peak Load Power plants:
To cater the demand peaks, peak load power plants are used. They are started up whenever there is a spike in demand and stopped when the demand recedes.
Examples of Peak load power plants are:

Which of the following power plant has least efficiency_________?

A. Nuclear power plant
B. Hydro power plant
C. Steam power plant
D. Diesel power plant

In regenerative cycle feed water is heated by_____________?

A. exhaust gases
B. heaters
C. draining steam from the turbine
D. all above

Mercury is a choice with steam in binary vapour cycle because it has____________?

A. higher critical temperature and pressure
B. higher saturation temperature than other fluids
C. relatively low vapourisation pressure
D. all above

The draught produced by steel chimney as compared to that produced by brick chimney for the same height is_____________?

A. less
B. more
C. same
D. may be more or less

The artificial draught normally is designed to produce____________?

A. less smoke
B. more draught
C. less chimney gas temperature
D. all of the above