Power Mechanics P2 Questions and Answers - Wisdom Pre-Mock Form 4 Exams 2021/2022

Instructions to candidates

1. Write your name and index number in the spaces provided above.
2. Sign and write the date of examination in the spaces provided above.
3. There are TEN stations in this examination.
4. Candidates are allowed 15 minutes at each station
5. At each station, candidates are not allowed to either review the previous stations’ work or read instruction for other stations
6. Attempt ALL exercises in each station
7. All dimensions are in millimeters unless otherwise stated.
8. This paper consists of 9 printed pages.
9. Candidates should check the question paper to ascertain that all the pages are printed as indicated and that no questions are missing.

For examiner’s use only

QUESTIONS

STATION 1
INSTRUCTIONS:
Draw the exploded view of the valve assembly shown below. (10 marks)

STATION 2
INSTRUCTIONS:
Using the galvanized sheet material and the hand tools provided make the template shown. (10 marks)

STATION 3
INSTRUCTIONS:

1. On the tyre provided on the workbench, determine the following;
   1. Tyre height
   2. Tyre width
   3. Tyre aspect ratio (6 marks)
2. Identify two tyre wear patterns on the tyre and state one cause of each. (4 marks) 

STATION 4
INSTRUCTIONS:
Identify the fluids labeled in the beakers and state one use of each in the motor vehicle. (10 marks)

STATION 5
INSTRUCTIONS:
Identify the locking devices labeled A to E and state a feature that makes each locking device unique in the class. ( 10 marks )

STATION 6
INSTRUCTIONS:
On the single cylinder engine provided measure the bore and stroke then calculate the swept volume.

Bore…………………………………………..mm (2 marks)
Stroke………………………………………...mm (2 marks)

Sweptvolume…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………cubic mm (6 marks)

STATION 7
INSTRUCTIONS:
Use the multimeter and determine the following and fill your results in the table below.

(10 marks)

STATION 8
INSTRUCTIONS:

1. Demonstrate to the examiner how to measure the voltage of each cell of the battery.(3 marks)
2. Connect a horn circuit and let the examiner check your work. (7 marks) 

STATION 9
INSTRUCTIONS:

1. On the gearbox assembly provided, demonstrate to the examiner how to engage gear position 1 and reverse. (4 marks)
2. Determine the number of times the input shaft will rotate as the output shaft completes one revolution in reverse gear position.
   Number of input shaft revolutions……………………. (6 marks)

STATION 10
INSTRUCTIONS:
On the multi-cylinder engine provided:

1. Remove the fan belt and show it to the examiner. (3 marks)
2. Inspect and record two defect on the belt. (2 marks)
3. Assemble back the fan belt on the assembly. (3 marks)
4. List two functions of the fan belt. (2 marks)

MARKING SCHEME

STATION 1
INSTRUCTIONS:
Draw the exploded view of the valve assembly shown below and label the parts. (10 marks)

CORRECT SKETCH ………………………………………………………………………….4 MARKS
CORRECT LABELING……………………………………………………………………….6 MARKS

STATION 2
INSTRUCTIONS:
Using the galvanized sheet material and the hand tools provided make the template shown. (10 marks)

CORRECT CURVE OF R32…………………………………………………………………………1 ½ MKS
CORRECT CURVE OF R12…………………………………………………………………………1 ½ MKS
CORRECT CURVE OF R24…………………………………………………………………………..1 ½ MKS
CORRECT CURVE OF R22……………………………………………………………………………1 ½ MKS
CORRECT CURVE OF R50……………………………………………………………………………1 ½ MKS
FILING OFF SHARP EDGES………………………………………………………………………….1 ½ MKS
FINISHING IN TIME…………………………………………………………………………………….1 MK

STATION 3
INSTRUCTIONS:

1. On the tyre provided on the workbench, determine the following;
   1. Tyre height
   2. Tyre width
   3. Tyre aspect ratio (6 marks)
      AS PER THE DATA IN SCHOOLS PER THE TYRE PROVIDED.
      EACH CORRECT DATA TO EARN THE CANDIDATE 2 MARKS
2. Identify two wear patterns on the tyre and state one cause of each. (4 marks)
   CANDIDATE EXPECTED TO CHECK FOR WEAR PATTERNS LIKE SHOULDER WEAR, CENTER WEAR, SPOTS WEAR, ETC. EACH CORRECT WEAR PATTERN TO EARN THE CANDIDATE 2 MARKS.

STATION 4
INSTRUCTIONS:
Identify the the fluids labeled in the beakers and state one use of each in the motor vehicle. (10 marks)

CORRECT IDENTIFICATION…………………………………………………………..1 MK EACH
CORRECT USE……………………………………………………………………………..1 MK EACH

STATION 5
INSTRUCTIONS:
Identify the locking devices labeled A to E and state a feature that makes each locking device unique in the class. ( 10 marks )

NAME AND UNIQUE FEATURE….…1/2 MARK EACH RESPECTIVELY

STATION 6
INSTRUCTIONS:
On the single cylinder engine provided measure the bore and stroke then calculate the swept volume.

Bore…………………………………………..mm (2 marks)
Stroke………………………………………...mm (2 marks)

Sweptvolume…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………cubic mm (6 marks)
AS PER THE SAMPLE DATA

STATION 7
INSTRUCTIONS:
Use the multimeter and determine the following and fill your results in the table below.

(10 marks)
AS PER THE SAMPLE DATA

STATION 8
INSTRUCTIONS:

1. Demonstrate to the examiner how to measure the VOLTAGE of each cell of the battery. (3 marks)
   
   CORRECT METHOD EARNS THE CANDIDATE 3 MARKS
2. Connect a horn circuit and let the examiner check your work. (7 marks)
   
   CORRECT CONNECTION EARNS THE CANDIDATE 7 MARKS.

STATION 9
INSTRUCTIONS:

1. On the gearbox assembly provided, demonstrate to the examiner how to engage gear position 1 and reverse. (4 marks)
2. Determine the number of times the input shaft will rotate as the output shaft completes one revolution in reverse gear position.
   
   Number of input shaft revolutions……………………. (6 marks)
   AS PER THE SAMPLE DATA

STATION 10
INSTRUCTIONS:
On the multi-cylinder engine provided:

1. Remove the fan belt and show it to the examiner. (3 marks)
2. Inspect and record two defect on the belt. (2 marks)
3. Assemble back the fan belt on the assembly. (3 marks)
4. List two functions of the fan belt. (2 marks)

CORRECT REMOVAL OF FAN BELT……………………………………………………..(3MKS)
TWO DEFECTS………………………………………………………………………………….(2MKS)
CORRECT ASSEMBLY…………………………………………………………………………(3MKS)
CORRECT FUNCTIONS OF THE FAN BELT…………………………………………..(2MKS)