# Brayton cycle consists of sets of processes

1.  Isentropic and constant volume

2.  Isentropic and constant pressure

3.  Isothermal and constant pressure

4.  Isothermal and constant volume

4

Isentropic and constant pressure

Explanation :
No Explanation available for this question

# The dual combustion cycle consists of two adiabatic processes and

1.  Two constant volume and one constant pressure processes

2.  One constant volume and two constant pressure processes

3.  One constant volume and one constant pressure processes

4.  Two constant volume and two constant pressure processes

4

Two constant volume and one constant pressure processes

Explanation :
No Explanation available for this question

# For the same compression ratio, the efficiency of dual combustion cycle as compared to otto cycle is

1.  More

2.  Less

3.  Equal

4.  None of the above

4

Less

Explanation :
No Explanation available for this question

# For the same compression ratio, the efficiency of dual combustion cycle as compared to diesel cycle is

1.  More

2.  Less

3.  Equal

4.  None of the above

4

More

Explanation :
No Explanation available for this question

# The air standard diesel cycle is less efficient than the Otto cycle for the

1.  Same compression ratio and heat addition

2.  Same pressure and heart addition

3.  Same rpm and cylinder dimensions

4.  Same pressure and compression ratio

4

Same compression ratio and heat addition

Explanation :
No Explanation available for this question

# With reference to air standard otto and diesel cycles, which of the following statements are true

1.  For a given compression ratio and the same state of air before compression. Diesel cycle is less efficient than on Otto cycle

2.  For a given compression ratio and the same state of air before compression, Diesel cycle is more efficient than on Otto cycle

3.  The efficiency of a Diesel cycle decreases with increases in the cut-off ratio

4.  The efficiency of a diesel cycle increases with an increase in the cut-off ratio

5.  Both (a) and (c)

5

Both (a) and (c)

Explanation :
No Explanation available for this question

# An otto cycle operates with volumes 40 cm3 and 400 cm3 at top dead centre (TDC) and bottom dead centre (BDC) respectively. If the power output is 100 kW, what is heat input, in KJ/s Assume γ =1.4

1.  166

2.  145

3.  110

4.  93

4

166

Explanation :
No Explanation available for this question

# Thermal efficiency of a standard otto cycle for n compression ratio 5.5, will be

1.  25%

2.  50%

3.  55%

4.  100%

4

50\%

Explanation :
No Explanation available for this question

# Air standard efficiency of an I.C. engine depends on

1.  Speed

2.  Compression ratio

3.  Fuel

4.  All of the above

4

Compression ratio

Explanation :
No Explanation available for this question

# Efficiency of a diesel cycle will approach to otto cycle, when

1.  Diesel engine will operate at high speed

2.  Cut off period of diesel cycle is reduced to zero

3.  Diesel fuel is balance with petrol

4.  None of these

4