Motor Trade Theory N1 — Document
August 2021 — N1 — Motor Trade Theory
N1
2021
Nated Engineering
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Q1— Section header —
1.1Various options are given as possible answers to the following questions. hoose the answer and write only the letter (A \next to the question number (1.1.1
1.1.10\n the ANSWER BOOK.
1.1.1An unplanned and uncontrolled event caused by unsafe acts or condition a hazard
1.1.2improved productivity excessive waste material tools and material left on
1.1.3red orange green
1.1.4To widen holes on a steel plate needle file flat file
1.1.5This item is not included in a normal socket se Off set spanner
1.1.6acute angles thickness of plates
1.1.7The component that determines the valve lift in an engine: Rocker arm Pushrod Valve lifter Cam lobe
1.1.8The battery of an electric vehicle can be charge by the following method: The alternator
1.1.9Which component changes the reciprocating motion of the piston into rotary motion? Crankshaft
1.1.10The voltage of a fully charged 12 lead 12 V
1.2Indicate whether the following statements are TRUE or FALSE by writing only 'True' or 'False' next to the question number (1.2.1
1.2.10\in the ANSWER BOOK.
1.2.1The four stroke cycle delivers power during all four strokes.
1.2.2The turbocharger increases volumetric efficiency of an engine.
1.2.3A hydrometer is used to measure the specific gravity of the battery electrolyte.
1.2.4Most batteries used in modern cars are maintenance free.
1.2.5Under inflated tyres improve the ride quality.
1.2.6Superchargers are driven off the exhaust gases.
1.2.7Fixed cooling fans consume more engine power than electric fans. 11040651 Copyright reserved Please turn over
1.2.8Removing the thermostat is the best advice for solv ing an overheating problem.
1.2.9Exhaust manifolds are normally manufactured from an aluminium alloy.
1.2.1020
Q2— Section header —
2.1Name the specific eye protection to be worn in the following operations
2.1.1Working with a grinder
2.1.2When welding (2 1\ (2\
2.2List THREE precautions to be taken before working underneath a vehicle. (3\
2.3Give the meaning of the following safety signs
2.3.311040651 Copyright reserved Please turn over
2.3.4
2.4What are the following tools used for
2.4.1Dial gauge
2.4.2 Compression tester
2.4.3 Feeler gauge
2.4.4 Vernier calliper (4 1\ (4\
2.5Give the reading indicated on the vernier calliper shown in FIGURE 1 below. FIGURE 1 (2\ [15]15
Q3— Section header —
3.1Name THREE methods by which the camshaft can be driven by the crankshaft (3\
3.2Name the TWO most common materials engine blocks are made of. (2\
3.3What do the following abbreviations refer to
3.3.1DOHC
3.3.2OHV (2 (1 11040651
3.4Label the diagram in FIGURE 2 below by writing only the answer next to the question number (3.4.1
3.4.8\n the ANSWER BOOK. FIGURE 2 (8\
3.5Which component closes the valve after the camshaft has opened the valve? (1\
Q4— Section header —
4.1Explain the term viscosity (1\
4.2What does the abbreviation PCV mean (1\
4.3Give TWO disadvantages of the plunger type oil pump. (2\
4.4List FOUR functions of lubricating oil. (4\
4.5Make a neat labelled sketch of an external gear type oil pump. Indicate the direction of gear rotation and ports. (7\ [15]15
Q5— Section header —
5.1Explain the basic principle of the thermo syphon cooling system. (3\
5.2Name the part that controls the engine operating temperature (1\
5.3Radiator shutters are sometimes installed on radiators. Explain the function of the shutters. (2\ 11040651
5.4Describe the difference between down flow and cross flow radiators
5.5List SIX components in a vehicle s water cooling system. (6\
5.6What is the function of the fins around the cylinder on a two stroke engine? (1\ [15]15
Q6— Section header —
6.1FIGURE 3 below shows a complete exhaust system on a modern motor car. Label the components (A E\n the ANSWER BOOK. FIGURE 3 (5\
6.2Briefly describe the operation of a turbocharger unit. (3\
6.3Explain the term sulphation as it occurs in lead acid batteries. (3\
6.4List FOUR battery tests that can be carried out while doing routine battery maintenance. (4\
6.5Describe the regenerative braking system as used in hybrid and electrical vehicles. (5\ [20] TOTAL SECTION B: GRAND20
Mark Allocation
Total100 marks
Sections20 + 15 + 15 + 15 + 20 = 85 marks
Paper information
TitleDocument
SubjectMotor Trade Theory
LevelN1
Document typeQuestion paper
Year2021
MonthAugust
Pages8
Downloads3
Examination context
Decade2020s
Years ago5y
SeasonWinter (SH)
Start daySunday
Exam periodAugust 2021
Days since exam1,898
About Motor Trade Theory examination preparation
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