NATIONAL CERTIFICATE (VOCATIONAL) MASONRY NQF LEVEL 2 NOVEMBER 2009

Transcription

1 NTIONL ERTIFITE (VOTIONL) MSONRY NQF LEVEL 2 NOVEMER 2009 ( ) 12 November (X-Paper) 09:00 12:00 This question paper consists of 6 pages.

2 ( ) -2- N1510(E)(N12)V TIME: 3 HOURS MRKS: 100 INSTRUTIONS N INFORMTION nswer LL the questions. Follow LL the instructions given in the question paper. Read LL the questions carefully. Number the answers correctly according to the numbering system used in this question paper. Keep subsections of questions together. Sketches should be neat, clear and done in pencil. Rule off across the page on completion of each subsection. Start each question on a NEW page. LL work you do not want to be marked must be clearly crossed out. Write neatly and legibly.

3 ( ) -3- N1510(E)(N12)V QUESTION 1: GENERL Various options are given as possible answers to the following questions. hoose the answer and write only the letter ( ) next to the question number ( ) in the NSWER OOK. 1.1 What is the width of a standard brick? 90 mm 222 mm 106 mm 73 mm (1) 1.2 t what intervals should a single leaf wall be supported? 10 m 7 m 20 m 15 m (1) 1.3 Which tool will the bricklayer use to lay bricks when building a wall? Gauging trowel Shovel ricklayers trowel olster (1) 1.4 What are corner profiles used for? To level foundations. To support concrete floors. To support the wall. To receive markings to keep mortar joints consistent. (1) 1.5 What is the purpose of P? To prevent moisture penetrating the walls. To keep bricks clean. To keep bricks and blocks clean. To keep floors and walls apart. (1) 1.6 The rows in which bricks are laid down are called courses. walls. units. ceilings. (1)

4 ( ) -4- N1510(E)(N12)V 1.7 Why is it necessary to use brick force in walls? To reinforce the walls. To keep walls in a vertical position. To set walls. eilings. (1) 1.8 Modular planning is based on a nominal joint thickness of 20 mm. 15 mm. 10 mm. 13 mm. (1) 1.9 What is the purpose of roof anchors? To tie roof trusses together. To support roof trusses. To tie lintels to the wall. To tie roof trusses to the wall. (1) 1.10 The minimum end bearing of lintels is 120 mm. 50 mm. 100 mm. 150 mm. (1) [10] QUESTION 2: INTROUTION N KGROUN 2.1 What is the difference between solid and hollow masonry units? (2) 2.2 Make a neat sketch of a brick, indicating a 'frog'. (2) 2.4 raw in good proportion TWO different types of masonry units. (4) [8] QUESTION 3: SETTING OUT MSONRY WLLS 3.1 List THREE reasons why it is important to have working drawing. (3) 3.2 riefly describe layout drawings. (5) 3.3 List FOUR setting out tools. (4)

5 ( ) -5- N1510(E)(N12)V 3.4 The National Home uilders Registration ouncil (NHR) specify the procedures to check the level of foundations. List FIVE steps to be followed when measuring foundation footings to ensure that they are truly horizontal and flat. (5) 3.5 escribe the purpose of mark out and setting out of masonry units. (3) 3.6 Give reasons why it is important to protect masonry units on site against rain. (3) [23] QUESTION 4: SI ONSTRUTION OF MSONRY WLLS 4.1 foundation is the foot of a building. When erecting buildings it is important that specifications are followed. Make a neat drawing and indicate the following: oncrete foundation and a foundation wall amp-proof course Ground level Surface bed Show at least THREE courses of the foundation wall. NOTE: ssume dimensions where not given. (10) 4.2 Name FOUR different types of bonds. (4) 4.3 escribe the special circumstances where it may be permissible to use burnt clay and concrete masonry units in the same structure. (3) 4.4 List FIVE specifications to lay down horizontal P. (5) 4.5 Name FIVE different methods in which mortar joints can be finished. (5) [27] QUESTION 5: VNE ONSTRUTION OF MSONRY WLLS 5.1 What is a cross wall? (1) 5.2 List FIVE steps to be followed when constructing racking back in a wall. (5) 5.3 What is the purpose of brick force? (2)

6 ( ) -6- N1510(E)(N12)V 5.4 hoose a description from OLUMN that matches an item in OLUMN. Write only the letter ( E) next to the question number ( ) in the NSWER OOK. OLUMN OLUMN Intrados outside ring of an arch entering inside ring of an arch Keystone last brick built in an arch Rise height of opening Extrados E arch soffit support (5 1) (5) 5.5 Name THREE types of roof anchors. (3) 5.6 riefly describe the purpose of roof anchors. (2) 5.7 Explain the procedure to be followed when inserting brick force in a corner. (5) 5.8 Name THREE types of lintels. (3) 5.9 Make a neat sketch of the front view of a steel window frame, build into a masonry wall and indicate the following: Pre-stressed concrete lintels (2) Head of window and brick force (2) rick force (2) [32] TOTL: 100