Fitting And Machining Theory N1 — Memo

August 2019 — N1 — Fitting And Machining Theory

N1 2019 Nated Engineering

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Q1— Section header —

1.1Ensure that all machinery used is fit for purpose and installed, operated and maintained in such a manner to prevent th e exposure of persons to danger afeguard exposed a nd dangerous parts of machinery

1.2.1Keep clean. Ventilate adequately. (3\

1.2.2Water or other dust allaying agents Dust extraction system (2\ [5]5

Q2— Section header —

2.1ccurate determination of heights as with the sine bar slots and recesses (2\

2.5(1\ [11]11

Q3— Section header —

3.1.1It is a helical groove cut in a cylindrical rod = 2, 15 mm

Q4— Section header —

4.1.1To drive in big pins (poles\, keys and shafts

4.1.2To hammer delicate work pieces with finished surfaces which can be easily damaged

Q5— Section header —

5.1Screwdrivers, hamme r heads, wood saws and spanners Dies for drop forging If the steel is overheated it will cause grain growth and leave a weak and defective part [12

Q6— Section header —

6.1o scribe lines on metal surfaces (1\

6.2.2

Q7— Section header —

7.1Milling machine (with end mill or side and face cutter\ (d = t/2 d = 10/2 mm\ D = d/12 60/12 [6]6

Q8— Section header —

8.1Drill a hole just above the nut through the bolt Insert the split pin into the hole and bend the legs back to prevent the split pin from falling out (3\

8.2Circlips are used to prevent the axial or end movement of parts (1\ [4]4

Q9— Section header —

9.1The die actually cuts the thread [5] TOTAL SECTION A SECTION B5

Q10— Section header —

10.1Ensure that all guards are in place Check that the d rills are sharpened correctly Check that the machine is operating correctly Wear goggles. Place a piece of wood under drills being removed Use only sharp drills

Q11— Section header —

11.1mount of material to remove and the finish required Whether to do wet or dry grinding heel speed rea of grinding contact Diamonds last a long time Diamonds wear slowly therefore the wheel face is p

11.3.1Shield

11.3.2Grinding wheel

11.3.3Work rest

11.3.4Wheel guard

11.3.5On/off switch

11.3.610

Q12— Section header —

12.1.1Headstock

12.1.2Carriage

12.1.3Tailstock

12.1.4Tool post

12.1.5Apron

12.1.6

12.210

Q13— Section header —

13.1Clean the machine after each work period Never use an air hose to remove chips Be very familiar with the machine before using it. Wear proper clothing and approved safety goggles Stop the ma chine before making adjustments.

13.2.1achine vice is clamped on the bed of the millin g machine and hold a workpiece for machining flats and slots.

13.2.4ividing head is used to drill holes, teeth, flats (like hexagons\ and splines around the circumference on a round bar. An a djustable tailstock is used

13.3Horizontal milling machine [10] TOTAL SECTION B GRAND TOTAL10

Mark Allocation

Sections5 + 11 + 6 + 4 + 5 + 10 + 10 + 10 + 10 = 71 marks

Paper information

TitleMemo

SubjectFitting And Machining Theory

LevelN1

Document typeNated Engineering

Year2019

MonthAugust

Pages7

Downloads3

Examination context

Decade2010s

Years ago7y

SeasonWinter (SH)

Start dayThursday

Exam periodAugust 2019

Days since exam2,628

About Fitting And Machining Theory examination preparation

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For stronger examination practice, complete the paper without unnecessary interruptions and keep track of the questions that take the most time. Afterwards, review the memorandum and separate knowledge gaps from mistakes caused by interpretation, calculation, structure, or examination technique.

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A practical revision approach

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