Question # 1

In a system of designating wrought aluminum alloys a sour digit number is used what does the first digit indicate.

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The purity of aluminum

The identity of the alloy

The alloy group

All of above

Which of the following give higher fibre strength.

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Eucalyptus

Pine

Bagnasse

Sugar cane

Which type of organic compounds does fat belong to.

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Alkene

Ester

Alkanol

Alkanoic acid

The by -product of the process of saponification is.

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Methanol

Glycol

Glycerol

Absolute alcohol

The percentage of nitrogen in ammonium sulphate is__________%

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27

21

23

19

What corrosion occurs under organic coating on metals as fine wavy hairlines?

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Stray current corrosion

Microbiological corrosion

Filiform corrosion

Simple corrosion

The substance that can form the glassy non-crystalline structure is called.

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Stabilizers

Fluxes or modifiers

Formers

None of these

The percentage of nitrogen in ammonia is _______________%

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32

82

25

55

What is the minimum tensile strength of gray Cast Iron class 50

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25000 ibf /in²

50000 ibf/in²

100000 ibf/in²

900000 ib/in²

Granulated sugar also known as.

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Brown sugar

Refined sugar

White sugar

None of these

Calander stock is a process in paper making in which.

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Thickness of the paper is reduced

Surface of paper is made smooth

Moisture is removed

Both A and B

Commercial detergents contain mainly ___________

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RCOON

RONa

RSNa

All above

What is the effect of manganese in cast iron.

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^{To affect the machinability ductility and shrinkage depending on form}

To reduce hardness by combining with sulfur below 0.5% and increase hardness above 0.55

To dioxide molten cast iron

Have no effect

What ASTM test for tension is designated for plastics.

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A 370

D 638

E 292

None of these

The principle former of almost all glasses is

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(SIO2)n

(SiO3)n

(SiO2)

None of these

Which of the following term is not used in pulping.

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Kappa number

Copper number

Bromine Number

Octane Number

Red brass contain about how many percent of zinc.

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20 %

15 %

30 %

25 %

Silicon bronze contains how many percent of silicon.

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96%

3%

1 %

69 %

Which of the following statement is not true is case of catalytic reforming.

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Dehydrogenations high endothermic

Dehydrogenation is exothermic

Hydrodealkylation reactions are endothermic

None of these

Alnico is an alloy containing how many percent nickel.

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10%

14%

18%

22%

Soap is soluble in grease because it

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Is non polar

Has a hydrophobic head

Has a hydrophobic tail

Has an ionic head and a hydrocarbon tail

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