DAE CH 213 Chapter 15 MCQs

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DAE | CH-213

APPLIED CHEMISTRY

CHAPTER : 15

DIPLOMA OF ASSOCIATE ENGINEERING

EXAM PRAPARATION

COMMON WITH:

APPLIED CHEMISTRY

MULTIPLE CHOICE QUESTION

Chapter:15 (Lubricants)

Question 1:

The process of introducing lubricant between the two moving parts in a machine is called

fortification liquefaction lubrication addition

Question 2:

Lubricants are primarily used to reduce

friction density Specific gravity volume

Question 3:

In addition to other industrial applications, lubricants are used for

house construction nuclear reaction gardening cooking

Question 4:

Oil, water, and oil emulsion are used as

Engine oils Cutting fluids Gear oil Lubricant for bearing

Question 5:

Cutting fluids should have viscosity

Low High moderate Very high

Question 6:

Mineral oils that are used as lubricants are obtained from

animals vegetables petroleum blended oils

Question 7:

A maximum hardness of on the Moh’s scale appears to be the practical limit for solid lubricant is

4 5 6 7

Question 8:

Easily oxidized at high temperature in to acid and become gummy at low temperature is

animals oils and vegetables oils mineral oils petroleum oils blended oils

Question 9:

The Blended oils are mixtures of vegetable oils and

fish oil oils from feet of cattle synthetic oil Petroleum products

Question 10:

Petroleum oils have long-chain hydrocarbons, ranging between

6-50 Carbon atoms 12-50 Carbon atoms 18-50 Carbon atoms 24-50 Carbon atoms

Question 11:

The lubricants which are produced by oils or fats with soap and water at \(204-316^0\)C.

Grease mineral oils synthetic oil Petroleum products

Question 12:

Oiliness of which oils can be improved by adding oils, such as Oleic and Stearic acid.

fish oils mineral oils from petroleum synthetic oils blended oils

Question 13:

Synthetic Lubricants Polyglycols are produced by oxidation of ethylene and

isobutene butene methylene propylene

Question 14:

The solid lubricant should have melting point.

high low moderate very low

Question 15:

Which lubricant, is usually used when it is not practical to use oil

Grease solid Gas Synthetic

Question 16:

Molybdenum disulfide is a common lubricant.

Oil solid Semi-solid Gas

Question 17:

Light machines sewing, watches, scientific equipments require lubricating oil of viscosity

high low moderate very low

Question 18:

Road rollers, tractors , Railway tracks require lubricant

Grease solid Gas Synthetic

Question 19:

Steam engine cylinders require lubricant of viscosity

high low moderate very high

Question 20:

Spaceship, aeroplane engine, Submarine engine, Military weapons require lubricants

Grease solid Gas Synthetic

Quiz Results

Total Questions:

Correct Answers:

Incorrect Answers:

Percentage:

NOTE

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INSTRUCTOR

MUHAMMAD BIN JAMEEL

BSC ENGG. CIVIL