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Q1— Section header —
1.12\in the ANSWER BOOK.
1.12There is no difference betwee hydrodynamic lubrication and hydrostatic lubrication. The word scanning means 'to gather information'. Fluorescent lights should be fitted when using CAD.
Q2— Section header —
2.1Indicate whether the following statements are TRUE or FALSE. Choose the answer and write only 'true' or 'false' next to the questio n number (2.1.1
2.1.6\ the ANSWER BOOK.
2.1.4
2.1.6Drawings should NOT be filed consecutively. Use bright light in a CAD drawing room. A dra ughtsman should have good problem solving abilities.
2.2State any FOUR aspects regarding lighting that need to be considered before planning the layout of a drawing office. (4\ [10]10
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3.1Give FIVE main characteristics/advantages of aluminium. (5\
3.2What is the basic difference between steel and cast iron (2\
3.3Plastics are compounds of carbon with one other element. Give the names of FI VE compound elements. (5\
3.4Explain the tempering process using steel. (3\ [15] QUESTION FOUR MACHINING AND MANUFACTURING PROCESS15
4.1Indicate whether the following statements are TRUE or FALSE. Choose the answer and write only 'true' or ' false' next to the question number (4.1.1
4.1.5\ the ANSWER BOOK.
4.1.1Boring can be used to correct misalignment errors of previous ly drilled holes.
4.1.2A mandrel is used on a milling machine.
4.1.3Alumin um oxid e and ilicon carbide are abrasive material
4.1.4Cutting speed is expressed in met es per second.
4.1.5
4.2Name THREE factors on which t he method of holding a work piece dep end (3\
4.3Explain what you understand by the datum line point as indicated on a manufacturing drawing. (1\
4.4Explain the term allowance. (1\ [10]10
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5.1Draw the diagram of an outside micrometer which shows a reading of 6,80 mm and show ALL the steps of how to obtain 6,80 mm. (6\
5.2Give FOUR uses of a vernier calliper (4\ [10]10
Q6— Section header —
6.1Name THREE groups of co uplings. (3\
6.2Make a simple freehand drawing of a square claw coupling and name TWO different components of the coupling. (4\
6.3Give the other well known name for the ook oupling.
6.4If the diameter of a shaft is 12 mm wha t will the key width be? (1\ [9]9
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7.1Draw a well labelled diagram of the sectional view of a sight feed lu bricator. (7
7.2Name THREE types of loads that can act on bearings (3 [10] 809018410
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8.1If the module (m \of a gear system is equal to 6 , calculate the dedendum of the gear system. (2\
8.2Explain, in your own words, each of the following in relation to spur gears
8.2.5
8.3Name the gear system that converts rotary motion into straight line motion. (1\
8.4Calculate the number of teeth of a gear with a pitch circle diameter (PCD\of 100 mm and a module of 10 (2\ [10]10
Q9— Section header —
9.3Make a free hand drawing of a sliding expansion joint and add ALL labels. Give any THREE common faults experienced by sliding expansion joints. Explain the working principle of