Question # 1

___________ surfactants perform well over a wide range of water hardness and pH.

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Anionic

Cationic

Nonionic

Neutral

For highly paraffine , crude oil, the characterization factor will be in range of

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11.5-12.5

12.5-13.0

13.5-14.0

13.4-15.0

Galvanized steel are steel products coated with

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Carbon

Sulphur

Zinc

Iron

What combination of elements has high electrical resistance high corrosion resistance, and high strength at red hear temperatures, making it useful in resistance heating.

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Aluminium bronze

Nichrome

Hastelloy

None of above

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

Which substances is not used as an additive in paper industry.

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Glucose

Starch

Alum

None of these

The percentage of nitrogen in Urea is _____________%

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46

37

82

50

Glass was first made by about________

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40 BC

400 BC

4000 BC

100 BC

Which sequence of steps is correct in paper making machine

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Pressing Dyring, Flow spreader Calender stock

Flow spreader, Pressing, Prying Calender sock

Drying ,Pressing , Flow spreader, Calender stock

None of above

________is best in its cleaning action.

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Soap

Detergents

Surfactant

None of these

The group H steels can be used n what temperature range.

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600^oC to 1100 ^oC

1000 ^oC to 1500 ^oC

1100 ^oC to 2000 ^oC

200 ^oC to 800 ^oC

Potassium sulphate with 48% to 52% potash, is made from.

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Potassium phosphate

Potassium Chloride

Potassium Nitrate

None of these

Which of the following is a component of soap.

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Sodium sulphate

Sodium stearate

Sodium chloride

Sodium bromide

Soapy detergents and soapless detergents behave differently in hard water because they

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Have different hydrophilic heads

Have different hydrophobic hydrocarbon chains

Have different pH values

Above A and C both

What is the effect of aluminum in cast iron.

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To increase hardness above 0.5 %

To deoxidize molten cast iron

To affect machinability, ductility and shrinkage depending on form

Both A and B

Each fat or oil in made up of

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A distinctive mixture of several different triglycorides

A distinctive mixture of several aldehydes

Mixture of above both

None of above

Ammonia when used directly as a fertilizer is to be injected about_____ under the surface to keep it from seeping out.

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2 inches

4 inches

6 inches

10 inches

The following statements are true except one which one.

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Carburizing does not harden a steel

Flame and induction hardening require the use of hard enable steels.

Quench –hardened steel does not require tempering to present brittleness

None of these

Which of the following cast iron is heat treated for ductility.

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Gray iron

Malleable iron

White iron

None of these

Iron is said to be abundant in nature. About how many percent of the earth’s crust is iron.

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10%

5%

20%

8%

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