MOTOR VEHICLE MECHANICS 2021 TEST OF DEC 2021

 

1.     (A) Gear box ni nini? Eleza na utaje shafuti kuu tatu za gear box

      (B) Taja kazi tano za manual gear box na utaje kazi tatu za clutch katika transmistion system.

2.(A)    Taja mapigo manne ya engine na ueleze yanavyo tokea ikiwezekana tumia michoro kuyaonesha.                                                       

  (B) Tumia mchoro ulio mzuri kuonesha sehemu zote za piston ikiwa ndani ya cylinder.

  (C) kiufundi andika sababu tano za engine kuchemsha na uelezee kwanini maji katika engine huchemka.

3. (A) Elezea mfumo wa upozaji unavyofanya kazi na utaje angalau component tano zinazo unda mfumo                          wa upoozaji bila kuisahau thermostat.       

   (B) Taja aina mbili za kila kifaa kifuatacho katika gari (i) thermostat (ii) fan (II) radiator (iv) water pump.

   (C) Taja mifumo minne inayounda mfumo wa umeme kwenye gari na utoe mfano kwa kila mmoja.

4.(A) Eleza nini maana ya yafuatayo katika mfumo wa brake.

             (i) Brake muster cylinder (ii) Wheel cylinder (iii) Check valve (iv) Repair kit.

     (B). Taja kazi mbili za brake booster na kazi mbili za brake muster cylinder.

     (C). Tofautisha ignition system na starting system kwa kutumia michoro.

     (D). Kwakutaja aina mbili za suspension sys eleza suspension ni nini? Na taja main components tatu           zinazounda suspension system ( mfumo wa mneso).

 5. (A) Eleza nini maana ya maneno yafuatayo.

         (i) Steering system (ii) Camber angle (iii) Caster angle. (iv) Ark man principle.

   (B).(i) Nini madhara ya cemba  angle katika magurudumu  yanayofungwa mbele ya gari?.

        (ii)   Eleza kwa kutumia michoro maana ya TOE IN na TOE OUT.

 6. (A). Taja aina tano za sensor unazo zifahamu katika magari na uleleze kazi y LAMBDA SENSOR.

      (B)  Taja aina mbili za gear box.

      (C)  Taja aina tatu za manual gear box.

 7. (i) Elezea maana ya kila alama zifuatazo katika tairi  za mabasi ya safari ndefu P205/60R16H88?

     (ii) Eleza faida mbili muhimu za kujaza upepo sahihi katika matairi ya magari, hasa magari ya abiria.

 8.  Eleza kiufundi nini maana ya PISTON CLEARANCE na VALVE CLEARANCE katika magari ya diesel?.

 9.  Taja faida mbili na hasara mbili za engine za mapigo mawili ukilinganisha na engine za mapigo manne.

10. eleza maana ya maneno yafuatayo katika mfumo wa mneso.

       (i) Over steer. (ii) Under steer (III) Over inflation (iv) Under inflation.

        

 

 

1.     Zipo anina mbili za mfumo wa uchomaji katika engine za magari ya kisasa, kwa kutumia michoro rahisi taja aina za mfumo wa uchomaji (ignition system) na uoneshe sehemu zake.

 

2.     SI ingine na CI engine ni aina za engine za mapigo manne na mapigo mawili, toa tofauti iliyopo kati ya SI engine na CI engine ukifafanua kiufundi Zaidi maana ya SI na CI.

 

 

3.     Nini maana ya alama zifuatazo katika matairi ya magari ya abiria P270/70R16H88

 

4.     Wewe kama fomen au supavaisa wa kampuni flani umepewa kitengo cha ufundi magari katika kutangaza nafasi za kazi kwenye kanmpuni hilo, je utatumia hatua zipi zakuwajulisha watu ili uweze kupata mafundi na nivigezo vipi utatumia kuhakikisha unawasimamia mafundi hao baada ya kuajiliwa?

 

 

5.     Eleza nini maana ya maneno yafuatayo katika engine za magari ya kisasa.

a)     Engine tune-up

b)     Injector pump calibration

c)     Engine timing

d)     Firing order

 

6.     Kwa kutumia uzoefu wako wa kiufundi magari andika nichaji zipi zinazo kimbiana? Na utaje aina tano za sensor unazozifahamu katika gari bila kuisahau LAMBDA SENSOR.

 

7.     Tumia michoro iliyo rahisi kuonesha vifaa vifuatavyo katika mfumo wa umeme wa gari.

a)     PNP na NPN

b)     S.I Engine.

c)     FUSE

d)     BATTERY V12

8.     Nini maana ya PREVENTIVE MAINTENANCE eleza.

9.     Taja aina tatu za preventive maintenance zinazo weza kufanyika katika workshop za ufundi magari hapa Afrika.

10.  Safety gears ni aina ya vifaa vinavyotumiwa na watu mbalimbali katika shughuli za kiufundi hapa duniani, Taja aina tano za safety gears zinazo tumiwa na mafundi magari kwenye workshop za magari.

 

 

 

 

 

 

 

 

 

1.      A Component which used to increase and decrease a vehicle speed is called………………………………………………………..

2.      A component which prevent engine over heat and over cool (or cold) is called ………………………………………………………………….

3.      Inlet Manifold and Exhaust Manifold are the parts of? ……………………………………………………………………………………

4.      ……………………………………………………………is a device which prevent  Ignition Coil to burn

5.      Which component in a vehicle prevent a driver over accident …………………………………

6.      ………………………………………………………………………………is a system which help to drive a vehicle in the road for left and right direction.

7.      Inlet Valve and Exhaust Valve are the type components of? ...............................................................

8.      Mention Five sensors that used in the vehicle (1)………………………(2)………………………(3)…………………………(4)………………………(5)………………………….

9.      A device that used to convert AC to DC electric is called…………………………………………………………………..

10.   ………………………………A device used to cool water in the radiator and that control temperature to the radiator is ……………………..

11.   Mention three methods of heat transmition (i)………………………………………   (2)…………………………………   (3)…………………………..

12.   Write the meaning of DOT_{3 ………………………………………………………………………………………………………………………………..}

13.   Write down a device which used to supply fuel to the engine system ……………………………………………………….

14.   ……………………………are the devices used to relies information if any fault occur in vehicles system.

15.   A process of all valve to open is called? .....................................................

16.   A device used to filtrate exhaust smock is called?.......................................................

17.   ………………………………is a type of sensor used to detect amount of oxygen burns in combustion chamber.

18.   Mention two types of spark plugs as like glow plug. (i)……………………………………………………….(ii)…………………………………………………………….

19.   …………………………………..is an exhaust emission control device used to change harmful compound from an engine emission  into safe gases.

20.   What type of engine smock wanted to be provided or given out relevant to the environment? …………………………………………..

21.   Define ENGINE .................................................................................................................................

22.   What is the device used to convert electric energy into mechanical energy? .......................................................................

23.   ………………………………………………..is a type of sensor used to calculate air density in the engine.

24.   The purpose of coolant material in water cooling system is? ....................................................................

25.   What type of gear which used to drive axle shaft in differential? ……………………………………………………………….