Assignment 1 2021 memo (1)

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University of South Africa *

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MISC

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Mechanical Engineering

Date

Nov 24, 2024

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Uploaded by CommodoreMosquitoMaster760

Assignment 1: Multiple choice questions (MCQ) 1. Why is it that Occupational Health Safety so important that Government has to develop a policy? (2) A. to provide health and safety of persons in connection with the use of plant and machinery. B. to protect all of persons against health and safety hazards arising from work situation. C. to establish an advisory council for occupational health and safety at work place. D. all of the above. 2. Regulations that apply to the design, manufacturer, and operation of driven machinery are aimed at that all. (2) A. regulations are in place. B. driven machinery are used in a safe manner. C. regulations are adhered to. D. regulations are displayed at work place. Which one is more in line with the statement above? 3. Technological changes are amongst the popular issues discussed in economic circles and might even intensely biased. Which of the following aspects is directly affected? (2) A. labour. B. economy. C. energy. D. production. 4. The six levels of product innovation are defined as: (2) A. cost discounts. B. repositioning. C. improvements to current products. D. a new to the local products. Which one is in incorrect? 5. What type of machines that must be fitted with a brake to hold to prevent accident on the event where there is power supply or load failure? (2) A. grinding machines. B. sending machines. C. lifting machines. D. wood-planning machines.

6. How should we regulate the effects of electrical shock? (2) A. display relevant symbols in the designated places. B. display notices indicating who qualifies to enter certain sections of buildings. C. indicate that persons may not interfere with electrical machinery. D. all of the above. 7. Which statement is “False”? (2) A. keep the tools clean after use. B. sharpen blades always before use. C. use of too much pressure on a tool course slip or break of the tool. D. check tools whether are in good order before use. 8. Which guideline best describe the prevention of slippage on belt drives? (2) A. ensure that there is enough power between the belt and the pulleys. B. the belt and the pulleys must be smooth. C. use the appropriate belt tension tools to adjust the belt. D. none of the above. 9. The functions of filing corners, extending square holes and door keyways resonates well with the tool(s). (2) A. square file. B. square and round files. C. square and half-round files D. square and knife-edge files 10. What is the responsibility of Mechanical engineers in the field of power generation? (2) A. generate electricity B. design and preserve structures and systems towards energy generation. C. install turbines and reactors. D. operation systems. 11. What is the responsibility of Electrical engineers in the field of power generation? (2) A. evaluate the effectiveness of electrical systems. B. conduct research into electrical programs for knowledge expansion. C. design and adapt manufacturing procedures for specific electrical components. D. all of the above.

12. Which one describe best the benefit of using chain drives? (2) A. reliability B. flexibility C. durability D. ductility 13. Which statement is well suitable to describe electrical control gear? (2) A. use of the interlocking devices to control the operation of switchgear B. identifying controlling equipment with the machinery, it controls C. use of the circuit breaker to isolate the conductors in the system D. none of the above 14. Hydraulic systems operate with the use of. (2) A. compressed air B. fluids C. compressed air and fluids. D. all of the above. 15. What is the principle that governs the operation of pneumatic systems? (2) A. Pascal’s B. Bernoulli’s C. Newton’s D. Boyle’s Answer questions 16 – 19 based on figure 1 below. Pneumatics and hydraulics involve cylinders with positions of different diameters and surface areas. These positions are connected using tubes or pipes to each other the system is filled with air. Based on your analyses on figure 1 above:

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16. The effect of the pistons courses the content inside the system to. (2) A. stuck the plungers not to move. B. be displaced from one cylinder to the other. C. move both syringes at equal levels. D. none of the above. 17. What will happen to the force from one plunger to the other due to pressure? (2) A. the force will be transferred from single cylinder in one direction B. the force is balanced on both cylinders. C. the force is dependent on one cylinder to the other cylinder. D. none of the above. 18. The force transferred by the piston rod is directly depended on. (2) A. the area of the plunger in the cylinder B. the length of the plunger in the cylinder C. the height of the plunger in the cylinder D. the base of the plunger in the cylinder 19. A small diameter input plunger connected to a large diameter output plunger result to a. (2) A. distance advantage. B. force advantage. C. mechanical advantage. D. ratio advantages. 20. Electrical and electronics systems are the most important and fundamental aspects of the society. Identify which laws govern the relationship that exist on the operation of electrical systems. (2) A. Kirchhoff’s. B. Thevenin’s. C. Ohm’s. D. Superposition. 21. What is the value of a colour-coded resistor with colour bands Brown Black Brown? (2) A. 10 Ω B. 100 Ω C. 1 Ω D. None. Do an analysis of figure 2 below and answer questions 22-24.

22. If switches A & B are both on OFF positions, the lamp will be. (2) A. ON B. OFF C. ON and OFF D. None 23. If switch A is on an OFF position and switch B is on an ON position, the lamp will be (2) A. ON B. OFF C. ON and OFF D. None 24. Figure 2 is a true representation of. (2) A. OR logic control. B. AND logic control. C. NOR logic control. D. NAND logic control. 25. Technology as a subject is understood as. (2) A. introduction of students to the natural sciences B. the use of knowledge, skills, values, and resources to meet the people’s needs and wants by developing practical solutions to problems, taking social and environmental factors into considerations. C. needs for the community D. a contribution to the needs of the societies 26. Civil Technology is one of the sections within Technology Education, its aim is to. (2) A. construct and enhance the built environment B. provide opportunities for teachers in schools C. promotes the concept of orthographic design D. it promotes the use of practical skills and the application of scientific principles.

27. Electrical Technology’s purpose is to. (2) A. verify the authenticity of the curriculum B. equip students with a solid foundation in electrical, electronic, and digital principles. C. contribute towards learners’ technological literacy D. none of the above 28. Engineering Graphics teaches. (2) A. basic careers for electricity B. basic careers in civil engineering C. structures covered in the subject D. graphical drawings as the primary means of communication in the technological world 29. Physical Science as a subject. (2) A. covers the design process B. empowers the society to address challenges experienced by applying the scientific, technological knowledge and indigenous knowledge systems. C. creates a negative atmosphere for students in the classrooms D. introduces students to the investigation skills 30. Design process is associated with skills of. (2) A. Practical solutions to the indigenous knowledge system B. Specific aim for the technological process C. Visual literacy, critical and creative thinking, self-discipline, and leadership. D. All of the above 31. The concept of Technology means. (2) A. the use of tools in the subject B. the teaching of the curriculum C. the introduction to basics in engineering and graphics D. a collection of practices and components. 32. Time-periods that outline the advancement of technologies include. (2) A. stone age B. 21st century C. renaissance D. all of the above 33. The specific aim for Technology Education is to. (2) A. appreciate the interaction between people’s values and attitude, technology, society and the environment. B. develop and apply specific design skills to solve technological problems.

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C. understand the concepts and knowledge used in technology education and use them responsibly and purposefully. D. all of the above 34. Mechanical Technology aims to. (2) A. create and improve the electricity profession B. the development of the design process C. create and improve the engineering and manufacturing industry D. all of the above 35. Conceptual knowledge is. (2) A. concerned with the relationship among items of knowledge. B. about the design process C. about systems concepts. D. none of the above 36. The first step in procedural knowledge is. (2) A. evaluate the best solution. B. create alternative solutions C. define the problem D. implement the best solution 37. Indigenous Knowledge is credited for. (2) A. enabling people to develop new products. B. introduction of the design process C. detrimental effects to the environment D. positive effects to the environment 38. Indigenous knowledge systems (IKS) refers to. (2) A. needs for the communities B. the complex set of knowledge and technologies existing and developing around specific conditions of populations and communities indigenous to a particular geographical area. C. the use of knowledge and skills to solve problems D. the introduction of specific problems 39. The term ‘orthographic’ means. (2) A. a sign board B. right eye C. two of the above answers D. perpendicular

40. Read the stages of design process in the inbox below and answer the questions that follow: Investigates: Finds out with assistance about the background context (people, environment) when given a problem, need or opportunity. Designs: Writes or communicates a design brief for the development of a product or related to a given problem, need or opportunity that clarifies the technological purposes of the solution. Makes: Develops plans that detail the making steps, including drawings and sketches that help to clarify the plans. Evaluates: Evaluates with assistance the product according to the design brief and suggests improvements and modifications if necessary. Communicates: Makes presentations (posters, charts or models) of design ideas and final product by combining simple dimensional text and sketches The statements above are examples of. (2) A. the assessment process for the subject technology B. the developmental outcomes for the technology subject C. the design process for the technology subject D. all of the above 41. Graphic language enables students to. (2) A. sketch free-hand drawing B. draw using the instruments C. develop projection skills D. all of the above 42. Perspective drawings represent. (2) A. three-dimensional (3d) objects B. two dimensional (2d) objects C. three-dimensional (3d) objects on a two-dimensional (2d) surface D. none of the above 43. Free-hand drawings. (2) A. provides students with the opportunity to sketch a drawing with using any instrument. B. provides students with the opportunity to sketch a drawing without using any instrument. C. the use of a hand should move freely with using a ruler. D. none of the above 44. First angle orthographic projection means. (2) A. projecting a drawing in such a way that one side is clear B. a two-dimensional object on a flat paper C. a three-dimensional object on a flat paper D. the conventional system of drawing language check

45. The importance of geometrical constructions is to. (2) A. introduces students to the investigation skills B. a collection of practices and components. C. to quickly and accurately finish a drawing with lines and figures D. none of the above. 46. The first step in procedural knowledge is. (2) A. evaluate the best solution. B. create alternative solutions C. define the problem D. implement the best solution 47. An example of a defect on the surface of finished concrete. (2) A. blow holes less than 15mm in diameter B. nails and screws less that 5mm C. plywood and chipboards less than 50mm D. the broader surface of the walls 48. A plain concrete. (2) A. is a combination of cement, fine aggregate and water B. a great tensile strength C. the ratio of water and cement D. is a high yield steel 49. One of the uses of glass is. (2) A. for the window panes B. ceiling boards C. raincoats D. painting 50. Technological changes are biased towards labour in keeping with developments in machine learning. Which statement best suit the assertion above? (2) A. robotics with big data enable machine to substitute workers on tasks that are not routine. B. the development affects tasks that requires both physical and cognitive skills. C. during the industrial revolution new industries emerged along with new opportunities for employment on long term basis but lack short term plan. D. all of the above.

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