Power Mechanics Form One
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MUSINGU HIGH SCHOOL
POWER MECHANICS FORM ONE
DECEMBER 2017 HOLIDAY ASSIGNMENT
Attempt all the exercises given.
SECTION A: (40 MARKS)
1. (a) State the meaning of the following terms as used in power mechanics.
- Machines
- Mechanics
- Power (3 marks)
(b) Arrange all the training levels related to power mechanics in ascending order. (2 marks)
2. (a) Name any four main workshop areas in a power mechanics workshop that require ventilation. (2 marks)
(b) (i) What are safety rules? (1 mark)
(ii) State any two specific rules with regard to behavior while in a power mechanics workshop. (2 marks)
3. (a) Highlight the function of the following technical drawing instruments:
- Drawing board
- Tee-square
- Protractor
- Divider (2 marks)
(b) What is the difference between a square and a cube? (2 marks)
4. (a) Define the term “hand tools”. (2 marks)
(b) State any two categories of hand tools used in power mechanics workshop. (2 marks)
5. (a) What is free hand sketching as used in technical drawing? (2 marks)
(b) Distinguish two dimensional and three dimensional figures. (1 mark)
6. (a) Name any two common types of pictorial drawings. (1 mark)
(b) How different is cavaliar and cabinet oblique drawings (2 marks)
7. (a) Define “orthographic projections”. (2 marks)
(b) What name is given to the plane(s) in which orthographic projections are made? (1 mark)
8. (a) An engine has a cylinder bore, d = 80 mm and a stroke of, L = 100 mm. Calculate the capacity of
the engine if the engine has six such cylinders. (Take engine capacity = πd2 LXN)
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where d = cylinder bore
L = stroke
N = number of cylinders
The units of engine capacity should be centimeter cubed; (cm3) (5 marks)
(b) What do you think is the function of a fuel tank on a vehicle engine system? (1 mark)
9. (a) briefly outline the procedure for treating a slight bleeding cut victim. (3 marks)
(b) How different is a set-square from a protractor? (1 mark)
10. (a) Name any two sources of energy used to run machines in industries. (1 mark)
(b) Draw a sketch of hacksaw blade and name any two parts. (2 marks)
SECTION B: (50 MARKS)
Answer ALL the questions in this section.
11. Construct a well dimensioned oblique cuboid measuring 50 mm x 60 mm x 90 mm, using A4 paper. (10 marks)
12. Using a sketch layout chart, discuss the various categories of materials used in engineering work. (10 marks)
13. (a) Define “professional ethics” as a topic in power mechanics. (2 marks)
(b) State the meaning of integrity. (2 marks)
(c) Explain any three professional ethics and moral values related to power mechanics.
(6 marks)
14. (a) State the meaning of the term “energy converter”. (2 marks)
(b) Name and explain the functions of any three energy converters. (6 marks)
(c) State the application of any two of the energy converters in (b) above. (2 marks)
15. (a) Complete the table below. (4 marks)
Fastening device / Function /Use- Self-tapping screw
- Plain washer
- Split (cotter) pin
- Nut
(b) Clearly explain the meaning of the following material properties;
- Compressive strength
- Shear strength
- Tensile strength
- Hardness
- Malleability
- Fusibility (6 marks)
THE MUSINGU SCHOOL POWER MECHANICS SUBJECT CREATIVE APPLIED & TECHNICALS DEPARTMENT