Machine Manufacturing NCV Level 3 — Document
February 2020 — NCV Level 3 — Machine Manufacturing
NCV Level 3
2020
NCV Engineering
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Q1— Section header —
1.1Id entify the machine in FIGURE 1. (1\
1.2Name FOUR machining processes that can be performed by the machine in FIGURE 1. (4\
1.3Name FOUR machine components found in the machine in FIGURE 1. (4\
1.4Give TWO advantages and TWO disadvantage s of the machine in FIGURE 1. (2 + 2\ (4\
1.5Give TWO examples of unsafe clothing to avoid when working with rotating machinery. (2\ [15] (6030203\15
Q2— Section header —
2.1Label the machine components in FIGURE 2 by writing only the answer next to the question number (2.1.1
2.1.5
2.2Name THREE taper turning metho ds that can be performed on the machine in FIGURE 2 (3\
2.3Compare the two machines shown in FIGURE 1 and FIG URE 2 in terms of:
2.3.1Chuck
2.3.2
2.4Explain the function of the lathe steady. (1\
2.5Name TWO types of steadies and explain where to mount it in the machine in FIGURE 2. (4\
3.1Choose a term from COLUMN B that mat ches a description in COLUMN A Write only the letter (A F\ next to the quest ion number (3.1.1
3.1.5\in the ANSWER BOOK. COLUMN A COLUMN B
3.1.5Prevent contact betwe en moving parts and the body Prevent machines from operating unless guards are closed Automatically move into position
3.2Indicate whether the following statement s are TRUE or FALSE by writing only 'True' or 'Fals e' next to the question number (3.2.1
3.2.5\in the NSWER BOOK.
3.2.1 CAM means computer aided measurement.
3.2.2The advantage of using CAD software package is that it is cheap.
3.2.3The e llipse command in CAD can be used to draw a circle if used properly.
3.2.4CAD application is suitable for repeti tive work.
3.2.5
3.3Various 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 (3.3.1
3.3.5\n the ANSWER BOOK.
3.3.1Case hardening is a heat carbon is removed from
3.3.2ool used with micrometer to transfer measurement Outside micrometer Vernier c
3.3.3Ferrous metal contains no carbon no iron
3.3.4Test to distinguish between cast iron and steel Fracture test Fibre test
3.3.5A dial t est measuring angles
Q4— Section header —
4.1Make labelled freehand drawings of each of the following machine symbols
4.1.1Chamfer
4.1.2Threaded hole
4.1.3Counterbore
4.1.4Reaming
4.1.5
4.2Your instructor has given you the task to machine engine castings and bore 2 mm diameter counterbore cap
4.2.1Draw a neat sectional drawing showing how the cap ead screw fits into the co unterbore cap screw holes.
4.2.2Name the TWO main tools needed to perform the task on the engine castings. (2\
4.2.3he drill bit breaks during drilling Give TWO reasons why the drill bit will break and state
4.2.4After completing the machining and boring of the engine castings, it is standard pract ice to record and report all information regarding the job. List THREE import
4.3FIGURE 3 shows a very important machine in the manufacturing industry. FIGURE 3
4.3.1Identify the machine in FIGURE 3. (1\
4.3
Q5— Section header —
5.1carriage is the assembly of various parts of a centre lathe that can be traverse d along the lathe bed. FIGURE 4 shows some of these component s. FIGURE 4
5.1.5
5.2A 15 mm diameter hole must be drilled in a piece of metal. The c utting speed is given as 600 mm per second. Calculate the speed of the drill in revolution per minute. (5\
5.3A workpiece must have 13 gear teeth machined on its circumference.
5.3.1Which type of indexing should be performed on this gear blan k? (1\
5.3.2Calculate the required indexing using a Cincinnati dividing head as shown below. (4\ CINCINNATI DIVIDING HEAD Side 1 24 25 28
5.4List FIVE pre operational chec ks to do before operating a milling machine. (5\
5.5Show , with the aid of free hand sketch the difference between down cut millin g and up
5.6A shaft 3 00 mm long must be turned in a lat he with a feed of 0,5 mm per revolution. The cutting speed for the material is 26 metres per minute and the shaft diameter is 45 mm. Calculate the time required to take one cut over th
Mark Allocation
Total100 marks
Sections15 + 15 + 15 + 20 + 35 = 100 marks
Paper information
TitleDocument
SubjectMachine Manufacturing
LevelNCV Level 3
Document typeQuestion paper
Year2020
MonthFebruary
Pages9
Downloads3
Examination context
Decade2020s
Years ago6y
SeasonSummer (SH)
Start daySaturday
Exam periodFebruary 2020
Days since exam2,444
About Machine Manufacturing examination preparation
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