In compression ignition engine fuel ignition accelerators are added to
A.Reduce combustion knock
B.Accelerate combustion knock
C.Reduce combustion chamber temp
D.Increase delay period
E.None of the above
Category: Heat Engines Mcqs
The top ring nearest to the piston crown is known as
A.Oil ring
B.Scrapper ring
C.Compression ring
D.Groove ring
E.Any of the above
Paraffins in petrol have the general formula
A.Cn H2n
B.Cn H2n + 2
C.Cn H2n – 2
D.Cn H2n – 4
E.Cn Hn
A vacuum of 712 mm was obtained with the barometer reading 753 mm of mercury. The corrected vacuum to a standard barometer of 760 would be
A.719 mm Hg
B.712 mm Hg
C.706 mm Hg
D.753 mm Hg
E.760 mm Hg
For the same maximum pressure and heat input, the most efficient cycle is
A.Brayton
B.Otto
C.Diesel
D.Dual
Which variety of coal has low calorific value?
A.Steam coal
B.Bituminous coal
C.Lignite
D.Anthracite
Capacitor kVA required to bring the power factor of a 500 kW load 70% to 85% would be
A.100 kVA
B.150 kVA
C.200 kVA
D.250 kVA
E.300 kVA
Tidal power is the power generated from
A.Waves of the ocean
B.Rise and fall tides
C.Thermal energy of ocean water
D.Raw sea water
E.Chemicals in sea water
All but one of the following possible steam generator test difficulties would cause the apparent performance to be poorer than it actually is. One item would make the performance look better than it really is. Identify the item
A.Steam flow meter reads low
B.Steam temperature gauge reads too high
C.HHV of fuel is determined incorrectly, being too high
D.Coad scales are inaccurate, reading high
