As the number of cylinders in multi-cylinder engine increases, the power to weight ratio_______________?
(A) Decreases
(B) Increases
(C) Remains same
(D) Decreases upto a limit and then increases
The termal efficiency of a petrol engine at design load is around_________________?
(A) 90%
(B) 50%
(C) 40%
(D) 30%
(D) 15%.
Method of governing used in petrol engine is________________?
(A) quantity governing
(B) quality governing
(C) combined governing
(D) partial governing
(D) hit and miss governing
Method of governing used in diesel engine is__________________?
(A) quantity governing
(B) quality governing
(C) combined governing
(D) partial governing
(D) nit and miss governing
An engine has a normal speed of 960 r.p.m. and no load speed of 1000 r.p.m. The speed droop of governor will be about___________________?
(A) 2%
(B) 4%
(C) 8%
(D) ±4%
(D) 1%.
The basic requirement of a good combustion chamber is___________________?
(A) high compression ratio
(B) low compression ratio
(C) low volumetric efficiency
(D) minimum turbulence
(D) high power output and high thermal efficiency
The part load efficiency of a carburettor is,___________________?
(A) Maximum
(B) Optimum
(C) Poor
(D) Constant
Deposition of carbon in petrol engine cylinder would result in increase of__________________?
(A) clearance volume
(B) swept volume
(C) compression ratio
(D) volumetric efficiency
(D) mean effective pressure
If petrol is used in a diesel engine, then______________?
(A) higher knocking will occur
(B) efficiency will be low
(C) low power will be produced
(D) black smoke will be produced
(D) lot of fuel will remain unburnt
In turbulence chamber in diesel engine__________________?
(A) the shape and layout of the piston crown, the inlet port, and the valve produce the turbulent effect of fuel mixture
(B) fuel is injected into an auxiliary chamber that is separated from the cylinder by an orifice or throat
(C) 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
(D) there are no valves
(D) fuel is partly burnt by spark