Maharashtra State Board of Technical Education 2012-2nd Sem Diploma Civil Engineering for GroupSubject Applied Science - Section – II (12020) - Question Paper

SCHEME – E
Sample ques. Paper
Course Name : Civil Engineering Group
Course Code : CE/CS/CR/CV
Semester : Second
Subject Title : Applied Science - part – II (12020)
Marks : 50 Time : three Hour (For both sections)


Instructions:-
1. All ques. are compulsory.
2. Figures to the right indicate full marks.
3. presume suitable data if necessary.

Q. 1. Attempt any 9 of the subsequent. [Marks 18]
a. What is the PH of extr emely acidic and extremely basic solution ?
b. Name 2 salts responsible for permanent hardness in water.
c. What is dolomite lime ? provide its 2 applications.
d. What happens when gypsum is not added during gr inding of clinkers ?
e. How the paint failure can be prevented ?
f. Write 2 functions and 2 characteristics of varnish.
g. describe enamel and lacquer s.
h. describe electro-chemical cor rosion.
i. What is cementation ? Name 2 methods of cementation.
j. Why galvanized containers are not used for storage of food stuffs
k. describe electrochemical corrosion. provide 1 example.


Q.2 Attempt any 4 of the subsequent. [Marks 16]
a. 3 beakers contain thr ee samples of water i.e. soft water, temporary hardwater
and permanent hardwater. How will you identify the 3 samples of water.
b. What is permutit or zeolite ? Dr aw a heat tagged diagram of permutit process and
wr ite its limitations.
c. describe scale and sludge. State any 2 disadvantages of scale formation in boiler.
d. provide the chemical reactions involved during,
i. Softening of water by ions exchange resins.
ii. Regeneration of exhausted ion-exchange resins.
e. compute PH of 2.5×10^-3N KOH solution assuming complete ionization.
f. What is slaking of lime ? Why is done ? How is it done ?


Q. 6. Attempt any 4 of the subsequent. [Marks 16]
a. Write the chemical reactions that take place dur ing setting of cement and discuss.
b. Write 2 properties and 2 applications of sorel's cement and plaster of par is.
c. State 2 functions of extenders, thinners, driers and pigments.
d. elaborate the disadvantages of distemper as compared to paint ?
e. Immer sed corrosion is based on galvanic cell action ? discuss.
f. Descr ibe process of 'tinning' for the protection of metals fr om corrosion.

Earning:   Approval pending.