🔍
Compare detonation and diesel knock on the basis of (i) Fuel Ignition Temperature (ii) Compression Ratio (iii) Speed (iv) inlet temperature (v) inlet pressure (vi) cylinder wall temperature (vii) cylinder size 
0 like 0 dislike

1 Answer

Comparison between detonation and diesel knock:

Parameter
To avoid Detonation in SI Engine 
To avoid Diesel knock
i) Fuel Ignition Temperature
High
Low
ii) Compression Ratio
Low
High
iii) Speed
High
Low
iv) Inlet temperature
Low
High
v) Inlet pressure
Low
High
vi) Ignition delay
Long
Short
vii)Cylinder wall temperature
Low
High
viii) Cylinder size Small
Large
0 like 0 dislike

Related questions

Explain the effect of the following engine variables on ignition lag and flame propagation: (i) cylinder size (ii) cylinder wall temperature (iii) compression ratio and (iv) inlet air temperature
Answer : (i) Cylinder size - Engine of similar design generally run at the same speed. This is achieved by smaller engine having larger RPM and larger engines having smaller RPM. Due to the same ... all reduces the ignition lag. Pre-increase in the intake temperature and pressure increases the flame speed....

View solution
0 like 0 dislike
1 answer

Compare pin type and suspension insulators on given points: (i) Position of insulator on cross arm. (ii) Position of conductor on insulator. (iii) Reaction on cross arm. (iv) Possibility of ... Replacement cost (vi) Maximum voltage level (vii) Effect on height of supporting structure. (viii) Life 
Answer : S.No  Points Pin Type insulator Suspension or Disc Type insulator 1 Position of insulator on cross arm It is fixed on top of cross arm by using galvanized steel pin. So it is ... so to maintain minimum ground clearance height of pole increase.  8 Life Less More ...

View solution
0 like 0 dislike
1 answer

Compare the SI and CI engine on the basis of: (i) Compression Ratio (ii) Operating Speed (iii) Power O/P per weight.
Answer : Parameter SI Engine CI Engine (i) Compression Ratio Compression ratio is low, about 10:1 limited by detonation Compression ratio is higher, about 18:1 to 22:1 (ii) ... due to lower compression ratio. Power output is more than SI engine due to higher compression ratio. ...

View solution
0 like 0 dislike
1 answer

Identify the sensors for the following : i) Wind speed ii) RPM of generator shaft iii) Temperature in generator iv) Cable untwisting v) Vibration vi) Wind direction
Answer : i) Wind Speed : Anemometer. ii) RPM of Generator Shaft: Accelerometers. iii) Temperature in Generator: Thermistor, thermocouple, RTD. iv) Cable Untwisting : Cable Twisting sensor. v) Vibration : Accelerometer, piezoelectric. vi) Wind direction: Wind vane....

View solution
0 like 0 dislike
1 answer

50.5k questions

47.1k answers

240 comments

7.0k users