Question

In: Mechanical Engineering

Which of the following statements about a real Rankine cycle is true? Top of Form (A)...

Which of the following statements about a real Rankine cycle is true?

Top of Form

(A)

The entropy of the working fluid increases across every component.

(B)

The temperature of the working fluid increases across the pump.

(C)

The pressure of the working fluid increases across the boiler.

(D)

The work performed by the pump is equal to the product of the power into the pump and the pump efficiency.

Expert Solution

all are true.

Explanation:

A. As the processes are real and not ideal, entropy generates at every component , that is in every process due to the efficiency of the components, as the efficiency is always less than 100% for real processes.

B. In pump, as the process is considered as irreversible adiabatic, the temperature of the working fluid increases, even if the process is not adiabatic, the temperature will increase.

C.In boiler, as heat is supplied to the working fluid, the phase of the fluid changes to vapour and the temperature, pressure and volume increases simultaneously.

D. the efficiency is given as

samet mamat answered 2 years ago

21 Which of the following statements about the cell cycle is TRUE? a. A cell has...

21 Which of the following statements about the cell cycle is TRUE? a. A cell has more DNA during G1 than it does in G2 b. Cytokinesis is the phase of the cell cycle where DNA is replicated. c. Cells in the G0 state are actively dividing. d. Normal cells do not enter S phase unless there are sufficient nutrients and resources to complete an entire cell cycle. 23 Cancers that arise due to proto-oncogenes turning into oncogenes require that:...

Which of the following statements about takt time and cycle time is true? A. Takt time...

Which of the following statements about takt time and cycle time is true? A. Takt time only depends on demand, not capacity. Cycle time does depend on capacity. B. Takt time only depends on capacity, not demand. Cycle time does depend on demand. C. Takt time and cycle time only depend on capacity. D. Takt time and cycle time only depend on demand.

Which of the following statements about correlation are true?

4. Correlation basics Which of the following statements about correlation are true? Check all that apply Correlation is a numerical value between 1.1 and 2. The sign of the correlation indicates the strength or consistency of the linear relationship between two variables. A negative correlation means that two variables tend to change in opposite directions The correlation indicates the strength and the direction of the linear relationship between two variables If the correlation between two variables is 0, there is no clear linear relationship between the...

Which of the following statements about genetics is TRUE?

Which of the following statements about genetics is TRUE? a. A mutation is any change in DNA that is harmful to an organism. b. Genetic disorders are always caused by the inheritance of recessive alleles. c. The red queen hypothesis proposes that asexual reproduction evolved in organisms to increase genetic variation, and therefore, improve resilience in ever-changing environments. d. Natural selection acts directly on the phenotype and indirectly on the genotype.

Decide which of the following statements are true and which are false. True False Real gas molecules...

Decide which of the following statements are true and which are false. True False Real gas molecules behave most ideally at low temperature and high pressure. True False At constant temperature, the lighter the gas molecules, the smaller the average kinetic energy. True False At constant temperature, the lighter the gas molecules, the smaller the average velocity. True False In order for two separate 1.0 L samples of O2(g) and H2(g) to have the same average velocity, the O2(g) sample must be at a...

Which of the following statements about reducing sugars are true?

Which of the following statements about reducing sugars are true?The oxidation of a reducing sugar forms a carboxylic acid sugar.A reducing sugar will not react with the Cu^2+ in Benedict's reagent. D-Mannose (an aldose) is a reducing sugar.Reducing sugars contain ketone groups instead of aldehyde groups.A disaccharide with its anomeric carbons joined by the glycosidic linkage cannot be a reducing sugar.

Which of the following statements about financial planning is not true?

Which of the following statements about financial planning is not true? Financial planning process is a series of decisions on how much money you will need at some future time to meet your goals and how you will obtain the money To meet your goals, you must balance the equation: Financial goal = present savings (FVIF n, k) + annual savings (FVIFA n, k) Once you have a financial plan in place, you need to review it only every few...

Which of the following statements is NOT true about the opinion of the auditor on the...

Which of the following statements is NOT true about the opinion of the auditor on the financial statements? Select one: a. The auditor is responsible for the detection and prevention of frauds and errors in financial statements. b. The auditor should examine whether recognized accounting principles have been consistently applied in preparation of the financial statements. c. The auditor should express an opinion on the financial statements. d. The opinion is not guarantee of the future economic viability of the...

which of the following statements regarding cash conversion cycle are TRUE? A. Cash conversion cycle depicts...

which of the following statements regarding cash conversion cycle are TRUE? A. Cash conversion cycle depicts the amount of days it takes for the firm to receive cash from sales B. Cash conversion cycle is calculated as follows: day sales outstanding + days payable outstanding - days inventory outstanding C. Cash conversion cycle is a measure of liquidity risk D. Cash conversion cycle measure the time it takes for the firm to exhaust its cash in its operations

which of the following statements is true? - A separate form 8949 must be filed for...

which of the following statements is true? - A separate form 8949 must be filed for each transaction for which the tax payer did not receive a form 1099B. - any taxpayer must file a separate schedule D for each form 1099B transaction with bases reported to the IRS. - short term transactions are reported on form 8949 and long-term transactions are reported on schedule D. - The totals from each schedule D are combined on form 8949.