Calicut University 2008-2nd Sem B.Tech Mechanical Engineering FIRST AND(ENGINEERING) , - Question Paper

FIRST AND 2nd SEMESTER B.TECH. (ENGINEERING) DEGREE
EXAMINATION, JUNE 2008


Chemistry

EN 04 104-B—ENGINEERING CHEMISTRY (B)
(For ME, CE, PE, AM)
[2004 admissions!
Time : 3 Hours

Part A ans all the ques..

I. (a) Mention any 2 kinds of lime and provide their composition and uses.

(b) describe roasting and calcination.

(c) Why is plasticizer used during moulding of plastics ?

(d) Mention the differences ranging from soda-base and lime-base greases.

(e) Write a note on white metals, te Gibb's phase rule and discuss the terms involved.


(g) "Corrosion products can act as a protective layer". discuss this term with the help of pilling Bedworth rule.

(h) What is fly ash ? define its range of composition as obtained in various investigations.
(8 x five = 40 marks)

PartB

II. (A) explain the softening treatment methods of water. discuss the requirements of boiler feed water.
(15 marks)

(B) Write notes on :
(a) Reinforced concrete.
(b) Bullet resistant glass.
(c) Bessemer process.
(3 x five = 15 marks)
.

III. (A) (a) explain the process of extrusion moulding and blow moulding,
(8 marks)

(b) Write a note on co-ordination polymerisation.
(7 marks)

Or




(B) (a) provide an account of selection of lubricant for cutting operations. (8 marks)

(b) Fatty oils are no longer used as lubricants. Why ? (7 marks)

IV. (A) (a) describe phase and component. define iron-carbon system with a suitable diagram.
(8 marks)

(b) define the application of phase rule in the study of binary systemforming compound with congruent melting point.

(B) (a) Draw a phase diagram for a binary alloy system with simple eutectic and discuss on the basis of phase rule.
(8 marks)

(b) Draw and discuss the important features of phase diagram of water system. (7 marks)

V. (A) (a) discuss the mechanism of electrochemical corrosion. • (7 marks)

(b) Write the application of surface conversion. (8 marks)

(B) (a) elaborate the necessities of protective coatings ? discuss the mechanism and application of anodized oxide coating.
(9 marks)



(b) Write a note on soil pollution. (6 marks)
[4 x 15 = 60 marks]

Earning:   Approval pending.