STUDENT SKILL PROMOTION TEST AUTOMOTIVE MECHANIC

AUTOMOTIVE ENGINE

A. OBJECTIVE TEST

1. The purpose of glow plug is to:a. preheat the fuelb. warm the passenger compartmentc. warm the driver if the engine begins to overheatd. preheat the pre combustion chambers for easier starting

2. The difference in diameters between a shaft journal and its supporting sleeve bearing is called: a. Bearing slackb. Oil clearancec. Distributing grooved. An interference fit

3. Three jobs of piston rings are toa. Cool, seal, and control oilb. Seal, prevent piston slap, and hold compressionc. Seal, compress, and controld. All of the above

4. The purpose of the oil spit hole in the connecting rod is toa. Spit out excess oilb. Lubricate the main bearingsc. Lubricate the cylinder wallsd. All of the above

5. The amount of cylinder taper determines whethera. To bore or replace the cylinderb. To install standard rings or rebore the cylinderc. The fuel system is faultd. The engine leaks oil

6. As the hydraulic valve lifter moves up, opening the valve, the disk or ball valve in the lifter is a. Openingb. Closingc. Opend. Closed

7. The device in the cooling system that raises the boiling temperature of the coolant in the system is called the

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a. Pressure capb. Vacuum valvec. radiatord. water jacket

8. Mechanic A says that the thermostat controls maximum coolant temperature. Mechanic B says that an engine that overheats will be repaired by replacing the thermostat with one of a lower temperature. Who is right? a. A onlyb. B onlyc. Both A and Bd. Neither A nor B

9. What is the main purpose of the water-pump by pass hose in the engine cooling system?a. to reduce pressure at the water-pump outlet during high engine

speedsb. to allow coolant flow within the engine while the thermostat is closedc. to prevent air pockets in the water-pump housingd. to prevent collapse of the lower radiator hose

10.The purpose of the relief valve in the lubricating system is toa. Ensure minimum pressureb. Ensure adequate oil circulationc. Prevent insufficient lubricationd. Prevent excessive pressure

11.The purpose of crankcase ventilation is toa. Remove liquid gasoline and waterb. Remove sludge and sedimentc. Cool the oild. Supply oxygen to the crankcase

12.The substance added to oil which helps keep the engine clean is calleda. soap b. a thickening agent c. greased. A detergent-dispersant

13.When the last part of the air-fuel mixture--the end gas—explodes before being ignited by the flame traveling from the spark plug, the result is a. Detonationb. Pre ignitionc. stallingd. vaporization

14.When the air-fuel mixture ignites before the spark takes place at the spark plug, the condition is called

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a. Detonation c. pre ignitionb. Ignition d. rumble

15.All of these statements are true about the idle solenoid excepta. It controls engine idle speedb. It can cause dieseling (after run) when not adjusted correctlyc. It holds the throttle valves slightly open while the engine is idlingd. It controls fast idle during warm-up

16.The stoichiometric air-fuel ratio of 14.7:1 means that mixture has a. 1 gallon of gasoline to 14.7 gallons of airb. 14.7 gallons of air to 1 gallon of gasolinec. 14.7 pounds of gasoline to 1 pound of aird. 14.7 pounds of air to 1 pound of gasoline

17.Gasoline fuel-injection system can be classified in two ways, according to whether they area. Timed or pulsed c. Timed or continuousb. Continuous or controlled d. None of the above

18.The Combustion chamber which is generally used at engine with the valve amount more than two in every cylinder is: a. pent roof type combustion chamberb. bathtub type combustion chamberc. wedge type combustion chamber d. hemispherical type combustion chamber

19.Rano and Karno have discussed about volumetric efficiency. Rano said that volumetric efficiency depends on design and the size of air filter, while in Karno’s opinion: volumetric efficiency depends on design and size of intake manifold. Who is right? a. Rano c. Both Rano and Karnob. Karno d. Neither Rano nor Karno

20.If ignition switch have been at position OFF, but engine still running a few moments new duration later; then death, can be caused: a. idle speed too highb. mixture of air and fuel too richc. air filter stuffed upd. existence of crust hoard at the piston or combustion chamber

smoldering

B. ESSAY TEST

1. Explaining two of cause of engine energy descends. Elaborate briefly and clear. 2. Explaining two of cause of engine overheating. Elaborate briefly and clear.

AUTOMOTIVE CHASIS AND POWER TRAINS

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A. OBJECTIVE TEST 1. See figure and call the name 1st, 2nd, 3rd and 6th component of power train

below :

2. See figure and call the name component of clutch below:

3. The advantage of construction and characteristic diaphragm spring clutch comparison to coil spring clutch is (except) :a. the aggregate more lessb. adjusting more easyc. stress of coil spring decrease on high speedd. the power less for release clutch heaviere. pressure still good even clutch disc wear

4. See figure and call the name component of clutch mechanism below :

5. An automobile requires a great amount of driving force for … (except) :a. starting to move

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a. pressure plate, clutch cover, diaphragm spring, straps and retracting spring

b. straps, diaphragm spring, boss, retracting spring and pressure plate

c. clutch cover, diaphragm spring, pressure plate, straps and retracting spring

d. clutch cover, diaphragm spring, pressure plate, retracting spring and straps

e. straps, diaphragm spring, pressure

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a. master cylinder, cable, release cylinder, reservoir and pedal

b. wheel cylinder, cable, master cylinder, reservoir and pedal

c. release cylinder, flexible hose, master cylinder, reservoir and push-rod

d. wheel cylinder, flexible hose, master cylinder, reservoir and push-rod

e. push-rod, flexible hose, release cylinder, master cylinder and

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a. Front axle, wheel, transmission and rear axle

b. Front axle, free wheel hub, tansfer and propeller shaft

c. Rear axle, tansfer, free wheel hub and propeller shaft

d. Front axle, tansfer, free wheel hub and propeller shaft

e. Front axle, free wheel hub, tansfer and rear axle

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b. acceleratingc. climbing hillsd. carrying heavy loadse. running on high way

6. See figure and call the type of gear below :

7. This statement is true at the constant mesh type of transmission, except :a. It has a splin main shaft to which each gear is splin-fittedb. Each gear is always in mesh with counter gearc. The gears are free to rotate with respect to main shaftd. The gears are free to rotate at different speedse. The main shaft and each gear is done by means of pair of clutch gear

or collar8. On the direct control transfer type, when the vehicle running off the road

and the wet condition, using of driven shaft is :a. N positionb. H2 positionc. H4 positiond. L2 positione. L4 position

9. See figure and call the type of brake below :

10.See figure and call the type of differential below :

11.See figure and call the name component of clutch below :

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a. Spur gearb. Bevel gearc. Spiral bevel geard. Helical geare. Worm gear

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a. anchor pinb. two leadingc. duo servod. leading trailinge. uni servo

a. Simple differentialb. Limited slip differentialc. Double speed differentiald. Locking differentiale. Torsen differential

12.See figure and call the type of rear axle below :

13.See figure and call the type of wheel alignment factor below :

14.What does the meaning of the tire size 200SR14 :a. 200 is diameter in millimeterb. S is symbol limited of speedc. R is symbol bias construction

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a. Synchronizer cone, synchronize ring, teeth dog, key spring, clutch hub sleeve and clutch hub

b. Inner synchronize ring, synchronizer cone, outer synchronize ring, shifting key, clutch hub and clutch hub sleeve

c. Inner synchronize ring, intermediate plate, outer synchronize ring, shifting key, clutch hub sleeve and clutch hub

d. Teeth dog, synchronizer cone, outer synchronize ring, shifting key, clutch hub and clutch hub sleeve

e. Main gear, teeth dog, synchronize ring, shifting key, clutch hub and clutch hub sleeve

a. Floating shaft typeb. Full floating typec. Semi floating typed. Three-quarter floating typee. No floating type

a. Camberb. Casterc. King pind. Toe-ine. Toe-out

d. 14 is height of tire in millimetere. R13 is symbol main material of tire

15.The distance of front side of front wheel is 130 and rear wheel is 125. the size of this condition is :a. Toe-in 5 mmb. Toe-out 5 mmc. Toe-in 255 mmd. Toe-out 255 mme. Caster 5 mm

16.Suspension type is specially or generally for rear wheel is :a. Mach personb. Wishbone with coil springc. Wishbone with torsion bard. Swing axlee. Wishbone with leaf spring

17.The aggregate of steering system with the function to increasing rotating force driver :a. Main shaftb. Pitman arm c. Drag linkd. Steering wheele. Knuckle arm

18.The pattern of tire for the muddy road is :a. Ribb. Blockc. Lugd. Mude. E-miller

19.The vehicles shock type is (except) :a. Groundb. Pitchingc. Rollingd. Bouncinge. Yawing

20.Brake drum type with the two cylinder and each of cylinder has piston is :a. Anchor pinb. Two leadingc. Duo servod. Leading trailinge. Uni servo

B. Essay1. How the hydraulic mechanism of brake system increase power/ force

from driver ?2. When the torsion dumper of clutch work? Explain with a simple

picture, torsion dumper action!

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AUTOMOTIVE ELECTRICAL

A. OBJECTIVE TEST 1. Two identical lamps are connected in parallel to a 12-volt source. The

voltage across each lamp is: a. 12 volt c. 4 voltb. 6 volt d. 3 volt

2. In a parallel circuit which of the following is true:a. Current is equal in all parts of the circuitb. Circuit resistance decreases as additional branches are addedc. Only one current path to groundd. None of these

3. The right procedures of tuning engine, listed below :a. Warm up the engine, adjust valve clearances, adjust timing ignition

and finally fix dwell angle.b. Warm up the engine, adjust valve clearances, adjust dwell angle and

finally fix timing ignitionc. Adjust valve clearances, fix timing ignition, Warm up the engine, and

finally adjust dwell angle.d. Adjust valve clearances, fix timing ignition, adjust dwell and finally

Warm up the engine

4. The actual time that coil ignition current is “ON” or flowing through the coil is referring to:a. Ignition delay d. Electromotive forceb. Dwell time c. Ignition Timing

5. Four cylinder spark ignition engine using distributor less ignition system needs two ignition coils to produce sparks into combustion chamber. If the engine has firing order 1-3-4-2, we can apply one ignition coil for combination of cylinder number : a. 1 and 2 c. 1 and 4b. 1 and 3 d. 2 and 4

6. On compression engine, glow plug has function to do:a. procedure to crank the engine at the first time on cold conditionb. ignite air-fuel mixture on cold conditionc. warm up fuel on the compression chamber on cold conditiond. warm up air on the compression chamber on cold condition

7. A battery that is overcharged can be due toa. loose alternator drive beltb. defective regulatorc. high speed driving.d. high resistance in the field circuit

8. The alternator brush rides on a:

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a. Slip ring c. rotorb. Commutator d. Diode

9. A vehicle failed a charging system output test. Mr. Bodong says if you supply full-fielded current to the alternator, and the charging voltage and current increases to normal levels, you usually have a bad regulator. Mr. Klowor says some alternators can be full-fielded by grounding the alternator output battery terminal. Who is correct? a. Mr Bodong only.b. Mr. Klowor only.c. both Mr Bodong and Mr. Klowor.d. neither Mr Bodong and Mr. Klowor.

10.During an alternator output test, you find that the output is zero amps and the voltage is 12 volts. Your next step should be to: a. replace the regulatorb. full-field (Alternator output test) the alternator and check the

readings.c. remove the alternator for bench testing.d. test the battery.

11. Each cell of a fully charged six cell battery produces:a. 1.75 volts c. 1.2 voltsb. 4.2 volts d. 2.1 volts

12.A battery that is undercharged for a long period of time will become:a. cycled. c. overheated.b. sulfated. d. none of the above

13.If you have data about specific gravity at 27 degrees C, like showed the following:

Cell 1: 1.270Cell 2: 1.260Cell 3: 1.245Cell 4: 1.190Cell 5: 1.250Cell 6: 1.260

What would be the proper action to take with a battery ? a. load test the battery.b. perform a 5-minute charge test.c. charge the battery. d. replace the battery

14.The charging indicator lamp is appearing when engine is running, this

indicates problems shown below, excepta. Fan belt is too tight b. Damage IC regulatorc. Grounded on Stator windingd. Poor connecting between alternator and connector specially L and S

terminals

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15.Engine Control Module outputs control which of the following devices:a. relays, lamps, motors, and pulse generators b. sensors, motors, and relays.c. motors, variable resistors, solenoids.d. motors, lamps, relay, and solenoids.

16.The input from TPS (Throttle Position Sensor) is used to do :a. Determine idle speed RPMb. Indicate the number of Hydrocarbon on tail pipec. indicate the rate of accelerationd. Indicate the engine temperature

17.If A MAP Sensor read approximately 1,4 to 1,7 volt, in a good engine should running at : a. idle Speedb. High Speedc. Medium Speedd. Acceleration

18.The sending unit in the fuel gauge utilizes:a. a fixed resistor. b. a zener diode. c. a float. d. a diaphragm

19.A solenoid on motor starter has two coils. Their windings are calleda. push-in and pull-out.b. pull-in and push-out.c. push-in and hold-out.d. pull-in and hold-in.

20.An open fault in the hold-in winding of a starter solenoid switch will most likely cause a. excessively high current draw from tthe starter .b. the battery to run down.c. the solenoid to move in and out, or chatterd. the starter drive to remain engaged after the engine is running.

B. ESSAYDirection :Complete the wiring diagram on answer sheet so that it can be right one and run well

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B. Complete the following relay horn circuit so that it can be the right one and run well!

Switch+ -Bateray 12V

RELAY

HORN

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C. Complete the schema of the head lighting system so that it can work! The system is using negative control

BATTERY

HEAD LAMP SWITCH

HEAD LAMP

HILOW

OFFTAIL

LIGHT

DIMER SWITCH

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