Engineering Science NCV Level 2 — Document
November 2018 — NCV Level 2 — Engineering Science
NCV Level 2
2018
NCV Engineering
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Q1— Section header —
1.10\the ANSWER BOOK. COLUMN A COLUMN B
1.10sed mainly on round components such as shafts to prevent longitudinal or lengthways movement Caused by inc orrect alignment of belts and pulleys
Q2— Section header —
2.1Indicate whether the follow ing statements are TRUE or FALSE. Choose the answer and write only ' rue' or ' alse' next to the question number (2.
2.1.5\ the ANSWER BOOK.
2.1.1Hydraulic braking systems are the most commonly used braking system in modern motor cars.
2.1.2The reservoir or tank of a hydraulic system is used as a control valve to alert, generate or cancel signals.
2.1.3A transistor has two legs and both legs have the same function.
2.1.4A c apacitor store and release electrical energy.
2.1.5
2.2When an LED is connected to a power source (galvanic cell\ photons are given out from the semiconductor substance. These photons are seen as light. FIGURE 1
2.2.1Identify the labelled components of the LED in FIGURE 1 by writing the answer next to letter in the ANSWER BOOK. (5\
2.2.2hat does LED stand for (1\ (6021022\
2.3Draw a neat sketch of each of the following electrical components:
2.3.1Ammeter
2.3.2ell
2.3.3Air core transformer
2.3.4
2.4Give ONE difference between a c onductor and an insulator in an electrica system and g ive ONE example of each.
2.5.1Make a sketch to show how the resistors are connected. (2\
2.5.2Calculate the total resistance of the circuit. (4\ [25]25
Q3— Section header —
3.1FIGURE 2 shows a cross sectional view of a V belt. FIGURE 2
3.1.1Identify the labelled parts by writing the an swer next to the letter in the ANSWER BOOK (4\
3.1.2Give ONE purpose of A. (1\
3.2Explain why belt dri ves cannot be lubricated. (4\
3.3Give TWO reasons why chain drives are fitted with idler sprockets. (2\
3.4Explain why chain drives are more efficient than belt drives. (4\
3.5Make a neat labelled sketch of a chain drive and include the river sprocket with fewer
Q4— Section header —
4.1FIGURE 3 shows three gears in mesh, with gear Q rotating in a clockwise direction as indicated by the arrow. FIGURE 3
4.1.1Give the rotation direction of gear P.
4.1.2Give the rotation direction of gear R.
4.1.3
4.2List FIVE types of gear used in engineering syste ms. (5\
4.3FIGURE 4 shows a simple gear drive. The speed of gear X is 800 r/min while ear Y has 200 teeth and rotates at 120 r/min. FIGURE 4 Calculate the number of teeth for gear X. HINT: (3\
4.4With the aid of TWO sketches, illustrate the difference between spur and double helical gears (4\ [15]15
Q5— Section header —
5.1State the main difference between hydraulic and pneumatic systems. (2\
5.2An e lectronic control system con sists of an input, a process and an output. The input is information supplied to microprocessor by a sensor. List THREE types of sensors used in engineering applications.
5.3List FIVE steps to follow when putting a machine back into operation after a service. (5\
5.4Give ONE advantage of an electromagnetic brake in the event of a power failure. (1\
5.5Name ONE application wh ich uses electromagnetic brakes. (1\
5.6List THREE types of brake systems that can be used in enginee ring systems. (3\ [15] (6021022\ NC115
Q6— Section header —
6.1As maintenance technician you have to inspect the components of the machine shown in FIGURE 5. FIGURE 5
6.1.1Identify the labelled parts b y writing the answer next to th letter
6.1.2tate what you would inspect on each of the following components (a\ (b\ Key Shaft
6.2State the tool or to ols used to complete each of th e following maintenance tasks:
6.2.1Measur ing the inside diameter of a drilled machine part
6.2.2Measur ing the resistance in an electrical component
6.2.3
6.3Name TWO benefit of a good maintenance plan. (2\
6.4Give ONE function of a control system. (1\ (6021022\ NC1 150 (E\
6.5State how a good maintenance program impacts on each of the following aspects of a business:
6.5.1Productivity
6.5.2Profit margins of the company
6.5.315
Topics Identified
2
CircuitsMachines
Mark Allocation
Total100 marks
Sections10 + 25 + 20 + 15 + 15 + 15 = 100 marks
Paper information
TitleDocument
SubjectEngineering Science
LevelNCV Level 2
Document typeQuestion paper
Year2018
MonthNovember
Pages9
Downloads4
Examination context
Decade2010s
Years ago8y
SeasonSpring (SH)
Start dayThursday
Exam periodNovember 2018
Days since exam2,901
About Engineering Science examination preparation
Engineering Science combines physics principles with engineering applications. The examination covers mechanics, thermodynamics, electricity, and materials science at the relevant N-level.
How to use this resource for revision
A TVET past examination paper is most useful when it is treated as an active revision exercise. Try the questions yourself before checking the corresponding memorandum. Where you make an error, identify the reason — was it a knowledge gap, a calculation mistake, an interpretation issue, or an examination technique problem?
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.
applying physics principles
selecting appropriate formulae
performing calculations with units
interpreting engineering scenarios
explaining scientific reasoning
A practical revision approach
Create a formula sheet organised by topic. The memorandum rewards correct formula identification, proper substitution, and accurate unit handling — always write the formula before substituting values.
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