WERU TECHNICAL AND VOCATIONAL COLLEGE
ELECTRICAL AND ELECTRONICS DEPARTMENT
TVET CURRICULLUM DEVELOPMENT, ASSESSMENT AND
CERTIFICATION COUNCIL (CDACC)
COURSE CODE : CBET6/023S/024JMS
UNIT OF COMPETENCY: PERFORM ELECTRICAL INSTALLATION
UNIT CODE : ENG/OS/PO/CR/01/6
QUALIFICATION : ELECTRICAL ENGINEERING (POWER OPTION)
QUALIFICATION CODE : 071306T4EEN
TIME : 2 HOURS
WRITTEN ASSESSMENT
2 HOURS
INSTRUCTIONS TO CANDIDATE:
1. This paper consists of TWO sections: A and B.
2. Answer ALL questions in sections A and B in the answer foolscap provided.
3. Marks for each question are indicated in the brackets.
4. Do not write on the question paper
5. Answer all questions in English.
NAME OF THE CANDIDATE
……………………………………………………………………………………………….......
REGISTRATION CODE OF THE CANDIDATE…………………………DATE…..…………………
SIGNATURE………………………………………………………………………………………………..
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SECTION A (40 Marks)
Answer ALL questions in this section.
1. State Four objectives of Health, Safety, and Environmental Standards (4mks)
2. The table below misses Personal Protective Equipment. Fill it appropriately. (6mks)
PURPOSE PPEs
Protect against falling objects and head injuries.
Prevent electric shock when handling live wires.
Reduce risks of foot injuries from heavy objects and
electric shocks.
Shield eyes from sparks and debris.
Minimize hearing damage in high-noise environments.
Protect against fire and arc flash hazards
3. List Five Safety Precautions When Working on Electrical Installations (5mks)
4. State Four Electrical work risks involved in Electrical Installation Project (2mks)
5. Highlight Three Precautions taken while handling PPE (3mks)
6. Explain Three environmental considerations while in Electrical Installation (6mks)
7. Describe the materials involved in class D and K fire (4mks)
8. Briefly discuss the CPR procedure done to Electric shock victim (10mks)
Page 2 of 4
SECTION B (60 Marks)
Answer ALL questions in this section
9. A trainee with limited electrical design knowledge was approached by a client planning to construct an
apartment. The client wanted a basic electrical plan to visualize the layout of lighting and power
circuits and estimate the project cost. The trainee attempted to create The Plan Below but did not
include a legend due to their ongoing learning process.
a) As a knowledgeable classmate, assist the trainee by creating a suitable legend that would help the client
clearly interpret the electrical plan. (13 marks)
b) Explain any modification you would recommend to the client in the Kitchen Area (7mks)
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10. The choice of drawing paper size in electrical installations depends on various factors.
a) List and explain three common drawing paper sizes and their applications. (6 marks)
b) Describe two advantages of using a larger paper size like A0 for electrical layouts. (4 marks)
11. Scaling is a crucial aspect of electrical drawings.
a) Define scale in technical drawing and explain why it is important. (3 marks)
b) Given that an actual wiring installation measures 25 meters and needs to be drawn on a 1:50 scale,
calculate the scaled distance on paper. (5 marks)
c) Explain one disadvantage of using very small-scale ratios in electrical drawings. (2 marks)
12. Orthographic projection is widely used in technical drawings.
a) Define orthographic projection. (2 marks)
b) Draw and label the three main views in orthographic projection. (5 marks)
c) Explain one advantage and one limitation of using orthographic projection in electrical drawing
interpretation. (3 marks)
13. Giving the full meaning of the following, Highlight their respective main responsibilities. (10mks)
i. IEEE
ii. OSHA
iii. EMCA
iv. ESH
v. IET
vi. WIBA
vii. KenGen
THIS IS THE LAST PRINTED PAGE.
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