The crankcase dilution means

A Dilution of fuel in the crankcase
B Dilution of oil by water in the crankcase
C Dilution of lubrication oil by fuel in the crankcase
D Dilution of mixture passing through crankcase in two stroke engines

Correct Answer: Dilution of lubrication oil by fuel in the crankcase

Crankcase dilution is a phenomenon of internal combustion engines in which unburned diesel or gasoline accumulates in the crankcase.
Excessively rich fuel mixture or incomplete combustion allows a certain amount of fuel to pass down between the pistons and cylinder walls and dilute the engine oil.
Bissoy MCQ
#Mechanical Engineering #Automobile Engineering

Related Questions

If 'blue' means 'green', green' means 'yellow' 'yellow' means 'orange', 'orange' means 'black', 'black' means 'white', 'white' means 'red', 'red' means 'pink', 'pink' means 'brown', 'brown' means 'grey', than what is the color of human blood?
A black
B red
C white
D orange
In the crankcase method of scavenging, the air pressure is produced by
A Supercharger
B Centrifugal pump
C Natural aspirator
D Movement of engine piston
The process of removing the burnt gases from the engine cylinder by the fresh charge coming into the engine cylinder from the crankcase, is known as
A Cleaning
B Priming
C Scavenging
D Detonation
Crankcase explosion in I.C. engines usually occurs as
A First a mild explosion followed by a bi explosion
B First a big explosion followed by a mil explosion
C Both mild and big explosions occurs simultaneously
D Never occurs
The function of positive crankcase ventilation (PCV) system is that it
A Mixes fuel with air
B Promotes combustion by creating a swirling movement in the air-fuel mixture
C Returns blow by gases from the crankcase to the intake system
D Feeds blow by gases to the exhaust manifold
If A + B means A is the sister of B; A x B means A is the wife of B, A % B means A is the father of B and A - B means A is the brother of B. Which of the following means T is the daughter of P?
A P x Q % R + S - T
B P x Q % R - T + S
C P x Q % R + T - S
D P x Q % R + S + T
If X + Y means X is the daughter of Y; X - Y means X is the brother of Y; X % Y means X is the father of Y and X x Y means X is the sister of Y. Which of the following means I is the niece of J?
A J - N % C x I
B I x C - N % J
C J + M x C % I
D I x C + N - J
Dilution method of disposing of sewage, is not preferred to
A When sewage is fresh
B When diluting water has high dissolved oxygen content
C When diluting water is used for water supply near the point of sewage disposed
D When the diluting water is having flow currents
A nuisance is experienced in diluting water if dilution factor is less than
A 100
B 60
C 40
D 20
No treatment of the sewage is given if dilution factor is
A Less than 150
B Between 150 to 200
C Between 200 to 300
D More than 500

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