26. The number of working stroke per minute in case of four stroke IC engine will be equal to :

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N2 ® N
2N യു കഴ

where N represents the revolutions turned by the crankshaft in one minute.

27. An engine working on an air standard Otto ‏ماعن‎ has the following particulars.
Piston diameter (bore) = 14 cm, Stroke length = 13 cm, clearance volume = 260 em®. The
compression ratio will be :

കര
(0)

5.28 (8) 3
8.54 (D) 8.69

28. Which is the type of gear employed in a vehicle that makes one rear wheel go faster than the
other while rounding a corner?

(4)
(0)

Bevel gear (B) Differential gear
Epicyclic gear (D) Worm and worm wheel

29. An economizer is fitted with a boiler is to :

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छ)
©
0)

Increase the steam pressure

Heat the fuel of low calorific value

Heat the air entering the fire grate

Heat the feed water by exhaust flue gases

30. The function of a surge tank in a hydro electric power plant is :

نم
رت0
©
)0(

To supply water at constant pressure

To produce surges in the pipeline

Relieve water hammer pressure in the penstock
To increase the head of water

81. A search light is rated 200V, 1A. It is to be connected to 230V supply. Find the value of
resistance to be inserted in series?

(#) 200೧ 23 80೧
(©) 2800 യ 150
32. What is the effective resistance of the network consisting of 10 parallel branches each with 8
resistance of 5Q7
வ 52 (8) 50 ©
(© 10 © M 058
24/2015 6 A