Electricity Paper 2 Questions and Answers - MECS Cluster Joint Pre Mock Exams 2021/2022

Share via Whatsapp

ELECTRICITY
PAPER 2

INSTRUCTIONS TO CANDIDATES

  • Candidates should have the following for this examination
    • Answer booklet
    • Drawing instruments
    • Mathematical tables
    • Drawing paper size A3
    • Answer ALL the questions
    • All dimensions are in millimeters unless otherwise stated.
    • Each question takes 30 mins

Exercise 1

  1. using the components, materials and equipment provided, carryout the following tasks
    1. Connect the circuit as shown in the figure below. Let the examiner check your work.
      MCEElecp2q1
    2. Vary the base resistance RB to obtain each of the base current IB values shown in table 1. For each value of IB , measure and record in the table the corresponding values of VCE and Ic
      IB (µA) VCE (V) Ic (mA)
      200    
      220    
      240    
      260    
      280    
      300    
    3. Using the values in table 1:
      1. Determine the current gain β when IB =240µA 2mks
      2. Plot a graph of Ic against VCE. 5mks

Exercise 2

  1. Use tools and materials to fabricate the candle holder shown below.
    MCEElecp2q2

Exercise 3

  1. Use the tools, equipment and materials provided to carry out the following task; a) terminate the three core flexible cable to the top plug and the iron box 15mks.
  2. Turn on the thermostat switch to ON position, measure and record the values of resistance between;
    1. Live and neutral at plug………………………………………
    2. Live and earth at plug…………………………………………
    3. Earth at plug and iron box body………………………………
    4. Neutral at plug and at the iron box……………………………5mks.

Exercise 4.

Using components and equipment provided perform the following task. Let the examiner check your work.

  1. On the breadboard, connect the circuit components as shown below. 3mks
    MCEElecp2q4i
  2. Connect the circuit and measure the voltage and current across and through 470Ω resistor. V………………………………..I……………………..2mks
  3. Measure and record the values of current and voltage across the 220Ω resistor.
    V………………………………………….I…………………………..2mks
  4. Measure and record the values of voltage and current
    1. 100Ω load resistor
      V=………………………………..I=…………………………2mks
    2. 560Ω load resistor
      V=………………………………..I=,…………………………..2mks
  5. Calculate the values in ii,iii and iv above and compare them wit the measured value. State the difference obtained. Account for the difference 9mks

Exercise 5

  1. Using PVC sheathed wiring, complete the installation shown below. Such that the bell is operated from either A or B. 20mks.
    MCEElecp2q5

CONFIDENTIAL

EXERCISE 1

  1. variable power supply ( 0-30v)
  2. Ten 470 ohms carbon resistors
  3. Ten 10K carbon resistors
  4. Ten 47k variable resistors
  5. Ten BC 101 NPN resistors
  6. Enough Connecting wires
  7. Enough Jumper wires
  8. five milli-ammmeters (0-100mA)
  9. five micro-ammeters 0-500µA
  10. bread board

EXERCISE 2

  1. tin snips
  2. scriber
  3. drilling machine
  4. bench vice
  5. mallet
  6. steel nail
  7. soldering gun
  8. solder wire

EXERCISE 3

  1. iron box (in good condition)
  2. multimeters
  3. tester
  4. screw driver

EXERCISE 4

  1. ten 100 ohms resistors
  2. ten 470 ohms resistors
  3. ten 560 ohms resistors
  4. ten 220 ohms resistors
  5. power supply
  6. enough connecting wires
  7. enough jumper wires
  8. bread board
  9. voltmeters (0-999v)
  10. ammeters (0-100mA)

EXERCISE 5

  1. consumer control unit
  2. ransformer 240v/12v
  3. two push buttons
  4. 12v bell
  5. 1.5mm2 cable twin with earth
  6. Electrician tool box
  7. Two Shallow patresses

 

MARKING SCHEME

EXERCISE 1

Areas to be marked  Maximum Score Candidate score
Correct connection  3  
Sub Total  3  

 

EXERCISE 2

Areas to be marked Maximum Score Candidates Score
Correct dimension 8 × ½  4  
Holes location – correct location 2  
Drilling 2 ½  
Cutting 8 × ½ 4  
Folding 3 × ½  
Flaps formation 2×1 2  
Soldering 2 × 1 2  
Finishing 2 × 1 2  
SUB TOTAL 20  

 

EXERCISE 3

Areas to be marked Maximum Score​ Candidate Score 
Total marks  20  

 

EXERCISE 4.

Areas to be marked Maximum Score Candidate Score
Correct connection 6× 1/2  3  
Subtotal  3  

 

EXERCISE 5

Areas to be marked Maximum score Candidate score
Dimension 8 × ½ 4  
Fixing components 5 × ½ 3  
Vertical cable runs 3 × ½ 2  
Horizontal run (flat) 2 × ½ 2  
Uniform spacing of clips 2  
90o bend 1  
Correct circuit connection    
CCU    
BELL    
Bell pushes 3  
Correct cable termination (firm and not knicked)    
CCU 1  
Bell 1  
Bell pushes 1  
SUB TOTAL 20  

Download Electricity Paper 2 Questions and Answers - MECS Cluster Joint Pre Mock Exams 2021/2022.


Tap Here to Download for 50/-




Why download?

  • ✔ To read offline at any time.
  • ✔ To Print at your convenience
  • ✔ Share Easily with Friends / Students


Join our whatsapp group for latest updates
.
Subscribe now

access all the content at an affordable rate
or
Buy any individual paper or notes as a pdf via MPESA
and get it sent to you via WhatsApp

 

What does our community say about us?

Join our community on:

  • easyelimu app
  • Telegram
  • facebook page
  • twitter page
  • Pinterest