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Q1— Section header —
1.1Name the THREE main types in which me als are classified (3\
1.2Br ief ly describe the composition of the THREE m etal classes mentioned in
Q1— Section header —
1.3Name the THREE types of cast iron used in industry. (3\
1.4Name TWO types of non ferrous metals. (2\
1.5Explain the composi tion of non ferrous alloys. (2\
1.6Name THREE types of non ferrous alloys. (3\
1.7Describe the main use of high speed steel. (2\
1.8Give TWO common uses of alumin um in the industry. (2\
1.9Describe ONE use of each of the following hand tools:
1.9.1Sledge hammer
1.9.2Phillips screwdriver
1.9.3Vice grip plier
1.9.4Allen key
1.9.5
1.10Explain TWO safety precautions with regard to portabl e electric drill
1.11Explain the TWO main uses of an angle grinder. (2\
1.12
1.13Explain the working of a compressor. (2\
1.14Name THREE mai types of self secured join ts used in fabrication. (3\
1.15Explain the purpose of joggling in the fabrication field. (2\
1.16Explain ONE use of the odd leg caliper (jenny caliper\. (1\
1.17Construct a neat drawing indicating how to bisec t an angle. (Any angle can be used (2\
1.18Which method will be used to develop one segment of a lobster back bend? (1\
1.19Calculate the volume of a cube that has a side length of 100 mm. Give the answer in m (3\ [48] 603102348
2.1Explain THREE general safety precautions with regards to welding. (3\
2.2Draw a neat sketch indicating leftward gas welding operation. Ensure that all necessary components are labelled and that the direction of the nozzle movement is indi cated on the sketch.
2.3Give TWO fire hazards during a welding process. (2\
2.4Draw a welding symbol indicating the following elements: The symbol for w eld all around The symbol for a f illet weld on other side of connection The symbol for a g rinding process as finishing (3\
2.5Draw a neat sketch indicating a single V utt joint ma nufactured from equal size
2.6Describe THREE disa dvantages of the SMAW process. (3\
2.7Draw a neat sketch indicating the flame sett ing of the carburi ing flame. (2\
2.8Explain why acetylene cylinders and fittings are provided with left hand thread.
2.9Describe the main purpose of a gas cylinder regulator. (2\
2.10After completing a gas welding operation, which va lve must be closed first?
2.11Briefly explain the meaning of backfiring with regards to gas welding
Q3— Section header —
3.1Describe the purpose of a scale with regards to drawings. (2\
3.2What is the main purpose of a detailed drawing with regards to a HVAC layout (2\
3.3Give any THREE inspections to be done on hooks before lifting commences. (3\
3.4Name any TWO main HVAC components that are installed as part of the building and forms part of the air conditioning
3.5Describe any TWO safety rules that crane drivers must adhere to. (2\ (6031023\ NC1050
3.6Describe the THREE instructions indicated by the crane assistant in the following sketches:
3.6.3
3.7Explain the identifiable property of a ang lay rope. (2\
3.8Explain the identifiable property of an rdinary lay ( ross lay\ rope. (2\
3.9Describe ONE characteristic of a rope with a wire core. (2\
3.10Draw a neat sketch indicating a two legged chain sling lifting a beam Ensure that the balancing aspect is indicated. (3\
3.11Describe in THREE steps how chain slings mu st be inspected before use. (3\