Applied Chemistry Mock Test 2

10%

Question 1 of 10

1. One of the advantages of the solid lubricants is ___________

unstable in radiation

permit equipment is simple

low coefficient of friction

high coefficient of friction than liquid lubricants

Question 1 of 10

Question 2 of 10

2. In solid lubricants, the _________ will be low.

coefficient of friction

stability

cleanliness

calorific value

Question 2 of 10

Question 3 of 10

3. In steel and steel lubrication, the zinc dialkyl dithiosulphates forms __________

ZnSO₄

ZnS

ZnSO₃

ZnSO₂

Question 3 of 10

Question 4 of 10

4. A sample of coal containing the following elements:
C=90%; H=5%; ash=4%; weight of the coal burnt=0.90g; weight of the water taken=600g; water equivalent of bomb calorimeter=2000g; rise in temperature=2.48^oC; fuse wire correction=10cal; cooling correction=0.02^oC; acid correction=50 cal. Calculate net and GCV of coal in cal/g. Assume latent heat of steam is 580cal/g.

HCV=7171.2cal/g; NCV=6889.2cal/g

HCV=6889.2cal/g; NCV=7171.2cal/g

HCV=7155.55cal/g; NCV=6894.55cal/g

HCV=6894.55cal/g; NCV=7155.55cal/g

Question 4 of 10

Question 5 of 10

5. In boundary lubrication, the coefficient of friction ranges about ______

0.05-0.15

0.5-0.15

1-1.5

0.05-0.1

Question 5 of 10

Question 6 of 10

6. To reduce the wear and tear of the gears ____________ are used.

Rust inhibitors

Oxide inhibitors

Anti wear agents

Dispersants

Question 6 of 10

Question 7 of 10

7. The emulsifiers in water in oil type emulsions are ________

Oxides

Alkaline earth soaps

Sodium salts

Potassium salts

Question 7 of 10

Question 8 of 10

8. Soaps are prepared by chemical treating of _________ by strong alkaline solutions.

Oils and salts

Fats and proteins

Salts and fats

Oils and fats

Question 8 of 10

Question 9 of 10

9. Natural gas contains ___________

hydrogen=50%

methane=70-90%

methane=80-40%

benzene=40-30%

Question 9 of 10

Question 10 of 10

10. Generation of heat takes place in __________ lubrication.

Thick lubrication

Boundary lubrication

Thin lubrication

Extreme pressure lubrication

Question 10 of 10