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Total Questions : 1197 | Page 52 of 120 pages
Question 511.


The function of oil-control rings is that it


  1.    lubricates the cylinder wall by releasing oil from its hole
  2.    keeps the cylinder wall lubricated by holding oil in its channel
  3.    prevents engine oil from going into the combustion chamber and returns excess lubricating oil off the cylinder wall through the return holes in the piston to the oil pan
  4.    maintains a seal and prevents escape of burned gases and oil leakage
 Discuss Question
Answer: Option C. -> prevents engine oil from going into the combustion chamber and returns excess lubricating oil off the cylinder wall through the return holes in the piston to the oil pan


Question 512.

The calorific value of Diesel is about


  1.    36.5 MJ/kg
  2.    38.5 MJ/kg
  3.    42.5 MJ/kg
  4.    45.5 MJ/kg
 Discuss Question
Answer: Option C. -> 42.5 MJ/kg


Question 513.

 
Which part of the automobile tyre is subjected to greatest flexing action ?


  1.    Bead
  2.    Side wall
  3.    Shoulder
  4.    Tread
 Discuss Question
Answer: Option B. -> Side wall


Question 514.

The temperature at which tyre inflation pressure should be checked is


  1.    `20^circ`C
  2.    `25^circ`C
  3.    `35^circ`C
  4.    ambient temperature
 Discuss Question
Answer: Option D. -> ambient temperature


Question 515.


The differential
ensures that each wheel is driven at a speed which corresponds to the
distance it must travel around a corner, and it consequently prevents
against excessive tyre wear.


  1.    Agree
  2.    Disagree
 Discuss Question
Answer: Option A. -> Agree


Question 516.


The rating of C.I. engine fuel (Diesel) is given by


  1.    octane number
  2.    performance number
  3.    cetane number
  4.    none of these
 Discuss Question
Answer: Option C. -> cetane number


Question 517.


The characteristic that is enhanced by the use of cylinder sleeves is


  1.    cooling efficiency
  2.    resistance to wear
  3.    lubrication performance
  4.    none of these
 Discuss Question
Answer: Option B. -> resistance to wear


Question 518.


The function of a second ring is that it is a


  1.    back up compression ring which will work in place of the top ring when it is broken
  2.    compression ring and aids the top ring in sealing and cooling
  3.    back up oil control ring which will work in place of the bottom ring when it is broken
  4.    cushion ring which prevents piston slap and knock
 Discuss Question
Answer: Option B. -> compression ring and aids the top ring in sealing and cooling


Question 519.

 
The stroke of an engine is the


  1.    volume of the cylinder
  2.    length of the connecting rod
  3.    internal diameter of the cylinder
  4.    distance between T.D.C. and B.D.C.
 Discuss Question
Answer: Option D. -> distance between T.D.C. and B.D.C.


Question 520.


The two rows of cylinders in a 'V' type engine are generally arranged at


  1.    `45^circ`
  2.    `60^circ`
  3.    `90^circ`
  4.    `130^circ`
 Discuss Question
Answer: Option B. -> `60^circ`


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