Question: A long delay period in compression ignition engines gives a more rapid rise in pressure which causes knocking.
[A].Yes
No
[A].
[B].
Answer: Option A
Explanation:
No answer description available for this question.
Mechanical Engineering
Anti-knock for compression ignition engines is
Question: Anti-knock for compression ignition engines is
[A].napthene
tetra ethyl lead
amyl nitrate
hexadecane
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
A fuel of cetane number 40 has the same ignition quality as a mixture of
Question: A fuel of cetane number 40 has the same ignition quality as a mixture of
[A].40% cetane and 60% alpha methyl napthalene
40% alpha methyl napthalene and 60% cetane
40% petrol and 60% diesel
40% diesel and 60% petrol
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
A mixture containing 65% of iso-octane and 35% of normal heptane will have
Question: A mixture containing 65% of iso-octane and 35% of normal heptane will have
[A].cetane number 65
octane number 65
qetane number 35
octane number 35
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
In petrol engines, advancing of the spark timing will __________ the knocking tendency.
Question: In petrol engines, advancing of the spark timing will __________ the knocking tendency.
[A].not effect
decrease
increase
[A].
[B].
[C].
Answer: Option C
Explanation:
No answer description available for this question.
By higher octane number of spark ignition fuel, it is meant that the fuel has
Question: By higher octane number of spark ignition fuel, it is meant that the fuel has
[A].higher heating value
higher flash point
lower volatility
longer ignition delay
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
In petrol engine, using a fixed octane rating fuel and fixed compression ratio, supercharging will __________ the knocking tendency.
Question: In petrol engine, using a fixed octane rating fuel and fixed compression ratio, supercharging will __________ the knocking tendency.
[A].not effect
decrease
increase
[A].
[B].
[C].
Answer: Option C
Explanation:
No answer description available for this question.
In petrol engines, using a fixed octane rating fuel, the increase in compression ratio will not effect the knocking tendency.
Question: In petrol engines, using a fixed octane rating fuel, the increase in compression ratio will not effect the knocking tendency.
[A].Agree
Disagree
[A].
[B].
Answer: Option B
Explanation:
No answer description available for this question.
In petrol engines, using a fixed octane rating fuel, the increase in engine speed will decrease the knocking tendency.
Question: In petrol engines, using a fixed octane rating fuel, the increase in engine speed will decrease the knocking tendency.
[A].Yes
No
[A].
[B].
Answer: Option A
Explanation:
No answer description available for this question.
A fuel of an octane number rating of 75 matches in knocking intensity as a mixture of
Question: A fuel of an octane number rating of 75 matches in knocking intensity as a mixture of
[A].75% iso-octane and 25% normal heptane
75% normal heptane and 25% iso-octane
75% petrol and 25% diesel
75% diesel and 25% petrol
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.