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Q1— Section header —
1.1Indicate whether the following statements are TRUE or FALSE by writing only rue' or ' als e' next to the question number
1.1.5\in the ANSWER BOOK.
1.1.1Sit or lean against a machine while it is in motion.
1.1.2If filing is done near the chuck use the file right handed.
1.1.3A hacksaw should be used for cutting material that is clamped in the lathe while it is in motion.
1.1.4Leave the chuck key in the chuck while you work on lathe
1.1.5Do not take measurements while the machine is in motion. (5 1\ (5\
1.2Name the PPE in the following sketch that a person has to wear in a work shop [1
Q2— Section header —
2.1Explain the FOUR effects of tungsten on steel. (4\
2.2Explain the TWO effects of nickel on steel. (2\
2.3Name the THREE effects of chromium on steel. (3\
2.4De scribe the alloy element chromium. (1\ [10] (11020202\10
Q3— Section header —
3.1Identify the part we use in the Brinell test machine. (1\
3.2Name the parts (A W\ of the Brinell test machine in the sketch below. (9\ [10]10
Q4— Section header —
4.1Name the THREE types of fits that we use in the engineering industry. (3\
4.2a s haft and a bush must be manufacture on a lathe. The sizes are as follows:
0.02Calculate the maximum and minimum tolerances between the bush and the shaft. (6\
4.3What type of fit should be use to fit a bearing on a shaft? (1\ [10] (11020202\10
Q5— Section header —
5.1Give THREE reasons why a sine bar has to be accurate (3\
5.2How many gauge blocks are in a M50 set? (1\
5.3Name th e components (A D\ in the sketch below. (4\ [8]8
Q6— Section header —
6.1Name the THREE main groups in which uges are divided. (3\
6.2Name THREE ommon materials that are used to manufacture gauges. (3\
6.3Make a neat sketch of a limit gap gauge. (2\
6.4What is the meaning of the go and no go on gauges
Q7— Section header —
7.1Name the advantages of using jigs. (5\
7.2Name FIVE requirements for a good jig. (5\ [10]10
Q8— Section header —
8.1When is a left hand cutting tool used? (1\
8.2When is a right hand cutting tool used? (1\
8.3Make a neat sketch of the neutral cutting tool of a lathe that shows the primary nd secondary clearance angles. (3\
8.4Make neat sketches that demonstrate the positive rake or angle, zero rake or angle and the negative rake or angle of cutting tools. (6\ [11] (11020202\11
Q9— Section header —
9.1Name the following parts (A C\ of a HSS drill. (3\
9.2What are the two angles in the following drawing of a drill? (2\
9.3If the cutting speed of mild steel is 25 m/min (S\and the rotational speed of the drill is 198 r.p.m. (N\ , w hat drill size in mm was used?
9.4Explain why reamers have left hand spirals (2\ [10]10
Q10— Section header —
10.1Give a definition of ies (2\
10.2Name the components (A E\f the following ie set: (5\
10.3Is the ie set in an open or close operation? (1\
10.4Is hand forging for small or large number of items? (1\