Diesel Cycle - MCQs with Answers

Diesel Cycle - MCQs with Answers

Q1. For the same capacity engines, the compression ratio of diesel engine

a. is lower than the compression ratio of SI engine
b. is higher than the compression ratio of SI engine
c. is same as the compression ratio of SI engine
d. cannot say

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Q2. Rate of burning in the compression ignition engine can be controlled by

a. rate of injection of fuel
b. rate of air taken into carburetor
c. both a. and b.
d. none of the above

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Q3. How is the heat added in the Diesel cycle?

a. reversibly at constant pressure
b. irreversibly at constant pressure
c. reversibly at constant volume
d. irreversibly at constant volume

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Q4. The below diagram is the p-v diagram of the Otto, Diesel and Dual cycles for the same compression ratio. Which in the diagram is the path followed by the Diesel cycle?



a. 1-2-4-7-1
b. 1-2-3-5-7-1
c. 1-2-6-7-1
d. none of the above

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Q5. For the same maximum pressure and temperature, what is the relation among the efficiencies of the Otto cycle, the Diesel cycle and the Dual cycle?

a. η_Dual > η_Diesel > η_Otto
b. η_Diesel > η_Dual > η_Otto
c. η_Diesel > η_Otto > η_Dual
d. η_Otto > η_Diesel > ηDual

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ANSWER: b. η_Diesel > η_Dual > η_Otto