i c engines Mcqs
201. Carburretion is done to________________?
comments icon0
A. break up and mix the petrol with air

B. govern the engine

C. scavenge the cylinder

D. feed petrol into cylinder

E. heat up the charge to cylinder

202. Which of the following solid fuel has high caloric value : ___________?
comments icon0

A. Peat

B. Bituminous coal

C. Wood

D. Anthracite coal
203. All the four operations in two stroke engine are performed in following number of revolutions of crank shaft______________________?
comments icon0
A. One

B. Four

C. Two

D. Half

204. The efficiency of the ideal diesel cycle is ________ than that of Otto cycle, for the same compression ratio
comments icon0

A. None of these

B. Equal

C. Lower

D. Higher

205. Which of the following solid fuel has high carbon content?
comments icon0

A. Peat

B. Coke

C. None of these

D. Coal

206. The average calorific value of wood is about : __________?
comments icon0

A. 25000 kj/kg

B. 33500 kj/kg

C. 23000 kj/kg

D. 19700 kj/kg
207. The part load efficiency of a carburettor is,___________________?
comments icon0

A. Constant

B. Maximum

C. Poor

D. Optimum

208. Scavenging air is supplied to a two-stroke engine at a density greater than that of atmosphere. This means the engine is__________________?
comments icon0
A. Not supercharged

B. Charged

C. Supercharged

D. Supercharged provided its speed is low

209. In turbulence chamber in diesel engine__________________?
comments icon0

A. the shape and layout of the piston crown, the inlet port, and the valve produce the turbulent effect of fuel mixture

B. only a part of air charge is contained in an auxiliary chamber in which the fuel starts to burn with insufficient air which due to explosion tendency mixes thoroughly into main cylinder charge

C. there are no valves

D. fuel is injected into an auxiliary chamber that is separated from the cylinder by an orifice or throat

E. fuel is partly burnt by spark

210. Deposition of carbon in petrol engine cylinder would result in increase of__________________?
comments icon0
A. compression ratio

B. swept volume

C. volumetric efficiency

D. clearance volume

E. mean effective pressure

211. Which of the following is mostly used used as blast furnace fuel for extracting pig iron from iron ores?
comments icon0

A. Brown coal

B. Hard coke

C. Woodchar coal

D. Anthracite coal

212. In the case of petrol engine at maximum output, the percentage of CO in exhaust gases is ____________________?
comments icon0

A. 5-10%

B. Considerable percent

C. Depends on load and quality of fuel

D. Zero

213. A two stroke engine is usually identified by__________________?
comments icon0
A. absence of valves

B. size of flywheel

C. location of fuel tank

D. type of lubrication system

E. weight of engine

214. The basic requirement of a good combustion chamber is___________________?
comments icon0

A. minimum turbulence

B. low compression ratio

C. high power output and high thermal efficiency

D. high compression ratio

E. low volumetric efficiency

215. A two stroke crank compressed engine has following ports in the cylinder_______________?
comments icon0

A. transfer port and exhaust port

B. suction port and transfer port

C. suction port, exhaust port and transfer port

D. transfer port only

E. suction port and exhaust port