Mechanical Engineering - Thermodynamics

1. 

For the same maximum pressure and temperature,

A. Otto cycle is more efficient than Diesel cycle
B. Diesel cycle is more efficient than Otto cycle
C. Dual cycle is more efficient than Otto and Diesel cycles
D. Dual cycle is less efficient than Otto and Diesel cycles

Answer: Option B

Explanation:

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2. 

In a steady flow process, the ratio of

A. heat transfer is constant
B. work transfer is constant
C. mass flow at inlet and outlet is same
D. all of these

Answer: Option D

Explanation:

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3. 

The entropy of the universe is continually on the increase.

A. Correct
B. Incorrect

Answer: Option A

Explanation:

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4. 

Select the correct statement as per Charles' law

A. p.v = constant, if T is kept constant
B. v/T = constant, if p is kept constant
C. p/T = constant, if v is kept constant
D. T/p = constant, if v is kept constant

Answer: Option B

Explanation:

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5. 

The unit of energy is S. I. units is

A. Joule (J)
B. Joule metre (Jm)
C. Watt(W)
D. Joule/metre (J/m)

Answer: Option A

Explanation:

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