Engineering Economics university questions

MG6863 Engineering Economics

Unit 3 Cash Flow

Part-A

1.     What is meant by rate of return method?

This method takes into account the total earnings expected from an investment proposal over its full life time. It also uses the accounting concept of profit.

2.     Mention the various rate of return method.

(i)                Internal rate of return

(ii)              Average of return

(iii)            Net present value method

(iv)            Payback period

3.     What is meant by revenue dominated cash flow?

The profit/revenue, salvage values of all inflows to an organisation will be assigned with positive sign and the costs outflows will be assigned with negative sign is called revenue dominated cash flow.

4.     What is meant by cost dominated cash flow?

The cost outflows will be assigned with positive sign and the profit, revenue, salvage values all inflows etc.,will be assigned with negative sign is called cash dominated cash flow.

5.     What is meant by annual equivalent method?

It is used for measuring investment worth by determining equal payments on an annual basis.

AE(i)=PW(i) (A/P,i,n)

6.     What is present worth method?

It measures the surplus in an investment project at time zero.The present worth of all cash inflows is compared against the present worth of all cash outflows associated with an investment of project.

7.     What is future worth analysis?

Net future worth measures the surplus at a time period other than 0. It is particularly useful in an investment situation where we need to compute the equivalent of project at the end of its investment period.

8.     What is rate of return?

It is the break even interest rate (i) which equates the present worth of a project’s cash outflows to present worth of its cash inflows.

ME2041 Advanced IC engines university questions

This post covers the Semester question of ME2041-Advanced IC Engines asked by the Anna University during May/June 2013. This is one of the elective subject for Mechanical Engineering students whom were pursuing final year 8th semester.Take this for your reference how the questions (Question Pattern) are asked for the Anna university examinations. 

B.E    DEGREE  EXAMINATION MAY/JUNE 2013

Regulation 2008

Eighth Semester

Mechanical Engineering

ME2041-Advanced IC Engines

Time : Three hours                                     Maximum : 100 marks                                                                             

Answer ALL questions

PART A  (10X2= 20 marks)

1.    What is a heterogeneous air-fuel mixture? In which engine is it used?

2.    Sketch T-Head type combustion chamber used in S.I engines.

3.    Mention any two advantages of induction swirl.

4.    What is an indirect-injection type combustion chamber.

5.    Why smoke is formed in a CI engine?

6.    State the significance of stoichiometric air-fuel mixture.

7.    State the methods by which ethanol is produced.

8.    Comment on the water tolerance of alcohol blends.

9.    What is the working principle of prechamber stratified charge engine?

10.    Mention the advantages of plasma ignition system.

PART B   (5X16=80 marks)

11.  (a)  (i)  Explain the stages of combustion in SI engines elaborating the flame front

propagation.	(10)
(ii) Explain briefly the various factors that influence the flame speed in S.I.
engines.	(6)

                        Or

(b) Describe the requirements of an S.I engine combustion chamber and explain the various types of combustion chamber.(16)

12. (a) With the aid of a schematic diagram , explain the combustion process in a C.I engine. (16)

Or

(b) Explain the factors affecting the delay period in C.I engines and summarize them.(16)

13.  (a)  (i)	Specify the main emissions from a multi-cylinder passenger car C.I
engine. How is the air-fuel ratio controlled so as to reduce emissions?		(10)
(ii)	What is a driving cycle? Discuss its significance with regard to
emissions.		(6)
	Or
(b)  (i)	Explain the functioning of three way catalytic converter , with a sketch.
Mention the limitations of a catalytic converter.		(12)

(ii)     What are the methods to reduce particulate matter emissions? (4)

14.    (a) Compare the properties of gasoline , methanol and ethanol as engine fuels and explain how they influence combustion and emissions?(16)

Or

(b) Discuss the change in properties of alcohol-petrol blends and their effect on the performance of the engine.(16)

15.  (a)  (i)	Describe with a sketches how a CI engine can be controlled
electronically.		(12)
(ii)	What is stratified charge? Give its significance.	(4)
	Or
(b)  (i)	Describe the features of homogenous charge compression ignition engine
and common rail direct injection engine with neat sketches.		(6 + 6)
(ii)	Briefly discuss about the necessity of pressure pick , charge amplifier in
an IC engine.		(4)

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