This set of IC Engines Multiple Choice Questions & Answers (MCQs) focuses on “Diesel Cycle”.
1. Diesel cycle is also known as _____________
a) constant volume cycle
b) constant pressure cycle
c) constant temperature cycle
d) none of the mentioned
View Answer
Explanation: Diesel cycle is also known as constant pressure cycle as pressure is constant in this cycle.
2. A diesel engine has compression ratio from ____________
a) 6 to 10
b) 10 to 15
c) 16 to 20
d) 25 to 40
View Answer
Explanation: None.
3. In Diesel cycle, heat addition takes place at ____________
a) constant temperature
b) constant pressure
c) constant volume
d) none of the mentioned
View Answer
Explanation: None.
4. The combustion in compression ignition engine is ____________
a) homogeneous
b) heterogeneous
c) laminar
d) none of the mentioned
View Answer
Explanation: None.
5. In a diesel engine, the fuel is ignited by ____________
a) spark
b) injected fuel
c) heat resulting from compressing air that is supplied for combustion
d) combustion chamber
View Answer
Explanation: None.
6. The thermal efficiency of a diesel cycle having fixed compression ratio, with increase in cut-off ratio will ____________
a) increase
b) decrease
c) be independent
d) none of the mentioned
View Answer
Explanation: None.
7. The pressure at the end of compression, in diesel engines, is approximately ____________
a) 10 bar
b) 20 bar
c) 25 bar
d) 35 bar
View Answer
Explanation: None.
8. What is the combustion in spark ignition engine?
a) homogeneous
b) heterogeneous
c) laminar
d) none of the mentioned
View Answer
Explanation: The combustion in spark ignition engine is homogeneous while the combustion in compression ignition engine is heterogeneous.
9. If the temperature of intake air in I.C. engine is lowered, then its efficiency will ____________
a) increase
b) decrease
c) remain same
d) increase up to a certain limit and then decrease
View Answer
Explanation: None.
10. The fuel in diesel engine is normally injected at pressure of ____________
a) 5-10 kg/cm2
b) 20-25 kg/cm2
c) 60-80 kg/cm2
d) 90-130 kg/cm2
View Answer
Explanation: None.
Sanfoundry Global Education & Learning Series – IC Engine.
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