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281.

Hot template curves are the plot of

A.	conductor sags and span lengths	B.	temperature and ground clearance
C.	temperature and humidity	D.	conductor weight and sag

282.

Conductors for high voltage transmission lines are suspended from towers

A.	to reduce clearance from ground	B.	to increase clearance from ground
C.	to reduce wind and snow loads	D.	to take care of extension in length during summer

283.

The fact that a conductor carries more current on the surface as compared to core is known as

A.	skin effect	B.	corona
C.	permeability	D.	unsymmetrical fault

284.

Skin effect results in

A.	reduced effective resistance but increased effective internal reactance of the conductor	B.	increased effective resistance but reduced effective internal reactance of the conductor
C.	reduced effective resistance as well as effective internal reactance	D.	increased effective resistance as well as effective internal reactance

285.

Which authority is directly concerned with generation and distribution of electricity?

A.	Electricity Authority of India	B.	Department of Science and Technology
C.	Ministry of Power	D.	State Electricity Boards

286.

The effect of electric shock on human body depends on

A.	voltage	B.	Current
C.	Duration of contact	D.	All of the above

287.

A current of 10 milli-amperes through human body

A.	will cause mild sensation	B.	will affect muscle control
C.	will affect breathing	D.	will cause death

288.

Economiser in a steam power plant is used

A.	To preheat air	B.	To preheat feed water
C.	To superheat steam	D.	None of the above

289.

A load curve helps in deciding

A.	size of the generating units	B.	total installed capacity of the plant
C.	operating schedule of the generating units	D.	All of the above

290.

A super-thermal power station has

A.	total generating capacity of over 2000 MW	B.	generating units running at above the critical steam
C.	steam generated at critical pressure	D.	unity power factor