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# edu.limpopo.gov.za NSC Grade 12 Mechanical Technology Sample Question Paper : Department Of Education

Name of the Organization : Limpopo Department Of Education
Exam : National Senior Certificate Grade 12 Exam
Type : Sample Question Paper
Year : 2014

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Website : http://www.edu.limpopo.gov.za/index.php??option=com_content&view=article&id=112&option=com_content

Marks : 200
Time : 3 hours

## Instructions & Information

1. Write your centre number and examination number in the spaces provided on the ANSWER BOOK.
2. Read ALL the questions carefully.

Related :Limpopo Department Of Education NSC Grade 12 Music Sample Question Paper : www.southafricain.com/2049.html

4. Number the answers correctly according to the numbering system used in this question paper.
5. Start EACH question on a NEW page.

6. Show ALL calculations and units. Round off final answers to TWO decimal places.
7. You may use a non-programmable scientific calculator and drawing/mathematical instruments.
8. The value of gravitational force should be taken as 10 m/s2.
9. All dimensions are in millimetres, unless stated otherwise in the question.
10. Write neatly and legibly.
11. Use the criteria below to assist you in managing your time.

## Sample Questions

Question 1: Multiple-Choice Questions
Various 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 (1.1–1.20) in the ANSWER BOOK, for example 1.21 D.

1.1 Which ONE of the following actions is considered dangerous when operating a lathe?
A Wearing eye protection
B Wearing correct clothing
C Measuring while the work piece is rotating
D Operating the lathe with all guards in place

1.2 Which ONE of the following safety regulations applies to the MAGS/MIGS welding process?
A Check the colour coding on cylinders.
B Hold the work piece in your hand during the welding process.
C Turn the relief valve very slowly.
D Ensure that the welding area is well ventilated.

1.3 Which advanced engineering equipment is used to determine the amount of twisting of a bar?
A Torsion tester
B Brinell tester
C Tensile tester
D Spring tester

1.4 Carbon steels are classified according to the percentage of carbon content. High-carbon steel contains less than … of carbon.
A 0,10%
B 0,30%
C 1,50%
D 0,60%

1.5 — is added to steel when toughness, hardness and wear resistance are desired.
A Bronze
B Solder

1.6 Identify the equipment used for a testing procedure in FIGURE 1.1 below.
A Gas analyser
B Spring tester
C Brinell hardness tester
D Torsion tester

1.7 Identify the milling process in FIGURE 1.2 below.Figure 1.2
A Down-cut milling
B Up-cut milling
D Slab milling

1.8 What is the advantage of down-cut milling?
A Greater cutting depth is obtained.
B The feed of the table must be slower.
C The method is subjected to vibration.
D Looseness (slack) in the table feed screw must be eliminated.

1.9 Identify the milling cutter in FIGURE 1.3 below.
A Dovetail cutter
B Side-and-face cutter
C T-slot cutter
D Equal-angle cutter

1.10 What do you understand by the nick-break test?
A Breaking a weld open to examine external defects
B Checking shear fractures of a weld
C Checking high-frequency sound effects
D Breaking open a welded joint to examine internal defects

1.11 Porosity of a welded joint refers to …
A metal found in weld metal due to surface contamination.
B small pinholes in weld metal due to atmospheric contamination.
C occurs as a cavity at the end of a welded joint.
D occurs as a cavity at the beginning of a welded joint.