JNTU, B.Tech,I-Semester,MECHANICAL AND ELECTRICAL SCIENCE, November ,2008

JNTU, B.Tech,I-Semester,

MECHANICAL AND ELECTRICAL SCIENCE, November 2008

(Civil Engineering)

SET-2

 

1. (a) Discuss the various applications of an I.C. Engine.

(b) What is FP? Define mechanical efficiency and explain its importance.

 

2. What factors are considered in selecting a refrigerant in following systems and

mention the name of the refrigerant used in each system.

(a) House hold refrigerator

(b) Ice-producing plant

(c) Air-conditioning plant for a cinema theatre.

 

3. (a) Explain the advantages of the following equipment used in welding process:

i. Head shield

ii. Chrome ? leather spats

iii. Scratch brush

iv. Chrome ? leather apron

(b) Describe the working principle and operation of gas welding process.

 

4. (a) What are the important parts of a planer? Explain the importance of each part.

(b) Discuss the following milling operations:

i. Slab milling

ii. Face milling

iii. Thread milling

iv. Gang milling

 

5. (a) Write Short notes in the context of Power shovels,

i. Class of material & Shovel output

ii. Depth of cut & Shovel output

(b) What are the merits of Roller Conveyors?

 

PART-B

 

1. Explain the construction of a DC machine with a neat sketch.

 

2. What are the various Industrial applications of d.c Motors. Why D.C series motor

is most suited for traction purposes.

 

3. Draw the general schematic of a single phase transformer and explain its working

principle.

 

4. (a) Explain the working principle of a three phase induction motor.

(b) Explain applications of junction motor.

 

5. (a) Explain the advantages and disadvantages of Moving Iron instruments.

(b) Explain the working of moving iron attraction type instruments

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