Fitting And Machining Theory N2 — Memo

April 2020 — N2 — Fitting And Machining Theory

N2 2020 Nated Engineering

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Q1— Section header —

1.1Block access to danger zones during operation. orrosion and fire resistant. Does n ot create hazards such as splinters and pinch points. a permanent part of the machine easily repairable. Complies with the requirements of the

1.2No combustible waste material shall be stored anywhere in quantity. No combustible waste material shall be stored or kept in the imm ediate vicinity where any electrical apparatus or heating apparatus is installed.

Q2— Section header —

2.66

Q3— Section header —

3.1.1deviation/tolerance on shafts

3.1.2

3.2Interference fit [7]7

Q4— Section header —

Q5— Section header —

5.1.1It is the pressure that i s generated between a bearing and a shaft.

5.1.2It is the lowest temperature at which lubricant will pour or flow at an adequa te rate to fulfil its function. (1\

5.1.3It is the ability of a substance to cling to another material or substance (1\

5.2.1Diaphragm valve (1\

5.2.2It has a rubber diaphragm wh ich is moved down by a screw (2\ [6]6

Q6— Section header —

6.1can bond with other materials. It is resilient. It can be de formed in different directions. [9]9

Q7— Section header —

Q8— Section header —

8.1Inlet valve Discharge/Outlet valve (2\

8.2The piston moves upwards causing the inlet valve to close and the air is compressed. The outlet valve opens and the compressed air is forced out into the air receiver. (2\ [4]4

Q9— Section header —

9.1Require no lubrication Slip occurs o prevent damage to the machine if there is a problem Require little attention With a multiple V belt drive the machine may still run when

9.2A gear drive is referred to as a positive drive because no slip occurs between the gears in mesh. (1\

9.3It has no effect on the velocity ratio. (1\

9.4he number of teeth per sprocket Distance between the sprockets

9.5The main function of a reduction gearbox is to reduce the speed between a motor and the driven part or machine. At the same time a reduction in speed allows for an increase in torque thus allowing heavier loads to be

Q10— Section header —

10.4The pressure relief valve protects the system from excessive pressure.

10.5.5

Q11— Section header —

11.4=0,

11.5.1

11.5.3(2\

11.6.1Absolute programming

11.6.220

Q12— Section header —

12.1index pin is used to turn the spindle through the worm gearing (1\

12.2.1Helical cutter Slitting c utter Side face cutter (3\

12.2.2A helical cutter i s used for slab milling. A slitting cutter i used for cutting material to length or utting narrow grooves or slots. A side and

12.3= 2 = 2 = 2 =2 (3\

12.5Deeper cuts may be taken at once [20] TOTAL SECTION B: GRAND TOTAL:20

12.4=0, (5\

Mark Allocation

Sections5 + 6 + 7 + 5 + 6 + 9 + 6 + 4 + 12 + 20 + 20 = 100 marks

Paper information

TitleMemo

SubjectFitting And Machining Theory

LevelN2

Document typeNated Engineering

Year2020

MonthApril

Pages9

Downloads3

Examination context

Decade2020s

Years ago6y

SeasonAutumn (SH)

Start dayWednesday

Exam periodApril 2020

Days since exam2,383

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Archived on8 September 2026

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