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Q1— Section header —
1.1The following information is applicable a gear drive Power transmitted = 4 Speed of the shaft = 2 800 r/min Calculate the torque on the shaft
1.2Modern workshops prefer to join a number of shorter shafts through the use of couplings to obtain the required length. State TWO reasons for joining shorter shafts in contrast of using longer ones (2\
1.3.1Label the parts indicated in FIGURE 1 by writing only the answer next to the letter (A B\ in the ANSWER BOOK. FIGURE 1 (2\
1.3.2Speed ratio (1\ Flexible ty re couplings are available in a combination of different substances. Name TWO of these substances. (2\ State FIVE qualities that the hydraulic oil of the clutch
1.6Speed ratio
1.6Number of belts
1.621
Q2— Section header —
Q3— Section header —
3.1Anti friction bearings operate on the principle of rolling motion and are therefore also called rolling bearings. Name FOUR rolling element s commonly used in anti friction bearings. (4\
3.210
Q4— Section header —
4.1.1Name the parts indicated in the sketch in FIGURE 3 below by writing only the answer next to the letter (A C\ in the ANSWER BOOK. (3\
4.1.2Name the device shown in FIGURE 3. (1\ FIGURE 3
4.2Briefly explain the purpose of a mechanical seal.
4.3Defin oil filter
4.4State in THREE points why lubrication oil should be properly filtered.
4.5wo commonly known water cooling systems are thermosyphon and impeller assisted cooling systems. State FOUR disadvantages of the thermosyphon cooling system over the impeller assisted cooling system (4\
Q5— Section header —
5.1A force applied o n piston A causes a force of 1 k N on Ram B in a hydraulic press. Ram B moves 10 mm upwards. The area of piston A is 0, and the area of Ram B is 0,1
5.1.1The diameter of Ram
5.1.2The force applied on piston A
5.1.3
5.2State FIVE functions of a hydraulic fluid in a hydraulic system. [11]11
Q6— Section header —
6.1State FOUR disadvantages of a diesel engine when compared petrol engine (4\
6.2State TWO functions of the carburet tor of a petrol engine. (2\ [6]6
Q7— Section header —
7.1A tower crane on a bogie is shown in FIGURE 4 Name the parts indicated in the sketch by writing only the answer next to the letter (A E\ in the ANSWER BOOK. FIGURE 4 (5\
7.2State TWO responsibilities /or characteristics to consider during the selection and application of steel ropes. (2\ [7]7
Q8— Section header —
8.1State the purpose of the following heat treatment processes on metals:
8.1.1mpering (2\
8.1.2Hardening (2\
8.2Describe the term heat treatment process (3\ [7]7
Q9— Section header —
9.1Briefly discuss organisational communication with respect to the following communication channels:
9.1.1Downward communication
9.1.2Upward communication
9.1.3Horizontal communication
9.1.4
9.2Explain capital budget (3\ [11]11
Q10— Section header —
10.1Drive and energy
10.2Persistence
10.3Responsibility
10.48