GATE ME 2007 | Rankine Cycle Question 18 | Thermodynamics

GATE ME 2007

MCQ (Single Correct Answer)

-0.6

Which combination of the following statements is correct?

The incorporation of re-heater in a steam power plant.

$$P:$$ always increases the thermal efficiency of the plant.
$$Q:$$ always increases the dryness function of steam at condenser inlet.
$$R:$$ always increases the mean temperature of heat addition
$$S:$$ always increases the specific work output.

$$P$$ and $$S$$

$$Q$$ and $$S$$

$$P,R$$ and $$S$$

$$P,Q,R$$ and $$S$$

GATE ME 2006

MCQ (Single Correct Answer)

-0.6

Determine the correctness or otherwise of the following Assertion $$(a)$$ and the Reason$$(r).$$

Assertion(A): In a power plant working on a Rankine cycle, the regenerative feed water heating improves the efficiency of the steam turbine.

Reason(R): The regenerative feed water heating raises the average temperature of heat addition in the Rankine cycle.

Both $$A$$ and $$R$$ are true and $$R$$ is the correct Reason for $$A$$

Both $$A$$ and $$R$$ are true but $$R$$ is NOT the correct reason for $$A$$

Both $$A$$ and $$R$$ are false

$$A$$ is false but $$R$$ is true

GATE ME 2006

MCQ (Single Correct Answer)

-0.6

Assertion (A): Condenser is an essential equipment in a steam power plant.

Reason(R): For the same mass flow rate and the same pressure rise, a water pump requires substantially less power than a steam compressor.

Both $$[a]$$ and $$[r]$$ are true and $$[r]$$ is the correct reason for $$[a].$$

Both $$[a]$$ and $$[r]$$ are true but $$[r]$$ is NOT the correct reason for $$[a].$$

$$[a]$$ is true but $$[r]$$ is false

$$[a]$$ is false and $$[r]$$ is true

GATE ME 2005

MCQ (Single Correct Answer)

-0.6

In the velocity diagram shown below, $$u=$$ blade velocity, $$C=$$ absolute fluid velocity and $$W = $$ relative velocity of fluid and the subscripts $$1$$ and $$2$$ refer to inlet and outlet. GATE ME 2005 Thermodynamics - Rankine Cycle Question 28 English