# KCSE 2011 Power Mechanics Paper 2 Questions with Marking Scheme

Power Mechanics Paper 2 (447/2)

1. STATION 1
The figure below shows a truncated air cleaner assembly. On the drawing paper provided, sketch in good proportion the exploded view of the assembly and label four parts.(10 marks)
2. STATION 2
Using the tools, equipment and materials provided, make the support bracket as shown in the figure below.(10 marks)
3. STATION 3
1. Identify the substances in the containers labelled V to Z and state the use of each in motor vehicle servicing.(5 marks)
 Substance Name Application in Servicing V W X Y Z
2. Identify the fasteners labelled P to T and state a feature that makes each fastener unique in its class.
 Fastener Name Unique Feature P Q R S T
4. STATION 4
Using the tools provided, determine the compression ratio of the given engine. Take the clearance volume to be 30 c.c.(10 marks)
5. STATION 5
State the name, class and use of the tools provided labelled A to E as shown in the table below.(10 marks)
 TOOL NAME CLASS USE Steel rule Layout Measuring linear dimensions A B C D E
6. STATION 6
Using the tools and materials provided, make the flange gasket to fit the given water pump.(10 marks)
7. STATION 7
Name the vehicle parts labelled F, G, H, J and K. For each part, identify one defect, state two possible effects and complete the table below.(10 marks)
 PART NAME DEFECT EFFECTS F G H J K
8. STATION 8
Using the tools, materials and components provided, connect the starting circuit of a vehicle.(10 marks)
9. STATION 9
For the tyre provided:
1. Identify and record the following:
2. Maximum inflation limit
3. Type of construction
4. Tyre size
5. Rim size
6. Date of manufacture
(3 marks)
2. Identify the defect at the section marked X and state one possible cause of the defect.
DEFECT.
POSSIBLE CAUSE.
(2 marks)
3. Demonstrate to the examiner how to measure the following:
1. inside diameter
2. height
3. width
(5 marks)
10. STATION 10
1. Using the multicylinder engine provided, demonstrate to the examiner how to identify the misfiring cylinder.(6 marks)
2. State:
1. two possible causes of the misfiring in (a) above.(2 marks)
2. how each cause in (b)(i) above is determined.(2 marks)

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