This section provides a quick preview of questions from the document. It may not display every question or the complete wording of each one. For the full content, including diagrams, tables and other information, view the original PDF above.
Q1— Section header —
1.140 kW electric motor with a speed of 1 250 r/min drives a maize sheller machine by means of a wedge belt rotating at 650 r/min. The machine has a heavy
1.1.1Calculate the speed ratio of the machine (2\
1.1.2Determine the service factor of the drive. (2\
1.1.3Calculate the design power. (2\
1.1.4Assume the larger pulley has a diameter of 1 000 mm. Determine the minimum pulley diameter. (2\
1.1.5Calculate the torque developed by the electric motor. (3\
1.2Explain the following terms
1.2.1Centre distance
1.2.2Belt deflection
1.2.3Clutch
1.2.419
Q2— Section header —
2.1Various options are given as possible answers to the following questions. Choose the answer and write only the letter (A D\ next to the question number (2.1 \ in the ANSWER BOOK.
2.1.1 reverse the vehicle at an incline. create enough centrifugal force to cause friction on the drum. stop the vehicle within a certain distance or time period. generate
2.1.2is an advantage of an air brake system. A f luid leak in the system that can cause brake failure
Q3— Section header —
3.1Part bearing
3.2Solid bearing
3.3Split bearing
3.4Thrust bearing
3.510
Q4— Section header —
4.1Give FOUR reasons why compressors must be cooled (4\
4.2Name THREE groups of lubricants and give ONE example of each. (6\
4.3Name THREE types of impellers used in centrifugal pumps (3\ [13] 819037313
Q5— Section header —
5.1The p ressure inside a hydraulic cylinder with an internal cross sectional area of 0,00163 m Calculate the following:
5.1.1The inside diameter of the cylinder in millimetres (mm\
5.1.2
5.2Explain Pascal s law of fluid mechanics. (2\
5.3raw the pneumatic symbol s of the following:
5.3.1Service unit (simplified symbol\
5.310
Q6— Section header —
6.1FIGURE 1 shows a combustion engine. Name the labelled components by writing only the answer next to the letter (A E\ in the ANSWER BOOK FIGURE 1 (5\
6.2Name the last THREE strokes of a four stroke petrol engine in the order of function. (3\ [8] 81903738
Q7— Section header —
7.1Briefly describe FOUR disadvantages of static tower cranes. (4\
7.2FIGURE 2 shows an overhead travelling crane Name the labelled parts by writing only the answer next to the letter (A C\ in the ANSWER BOOK. FIGURE 2 (3\
8.1Descr ibe the general behaviour of the following metals when gas welding is applied:
8.1.1Aluminium (3\
8.1.2Austenitic stainless steel (2\
8.2Briefly describe the basic characteristics of the following polymers with reference to hardness as it appears from non laboratory tests
8.2.1Nylon
8.2.27
9.1Briefly explain the purpose of a grievance procedure (4\
9.2Mention FIVE characteristics of a good report. (5\
9.3Name THREE types of information that appear on a requisition card about the ordering of goods in an organisation. (3\ [12] QUESTION 10: ENTREPRENEURSHIP12
10.1Briefly explain the qualities of a good entrepreneur (4\
10.2Name FOUR factors that can influence th location of a small business enterprise. (4\ [8] TOTAL: 1008