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Motorcycle Small Engine NC II Practice Questions - TESDA Motorcycle Small Engine Servicing NC II Competency Assessment Exam
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Question
1
of 25
QUESTION 1 / 25
What is the standard procedure for cleaning a polyurethane foam air filter element used in most small underbone motorcycles?
Choose one answer below.
A
Wash with kerosene or a high-flash point solvent, squeeze out the excess, dry it, and then saturate with clean engine oil and squeeze out excess oil.
✓
B
Blow with high-pressure compressed air from the inside out and wipe the exterior surface with a dry cloth.
✓
C
Wash with gasoline, wring it out tightly, and install it immediately to allow the fuel to clean the carburetor.
✓
D
Soak in hot soapy water, wring it out to dry, and install it dry without applying any oil.
✓
QUESTION 2 / 25
When checking the engine oil level of a motorcycle using a dipstick, which of the following describes the correct measurement procedure?
Choose one answer below.
A
Warm up the engine, shut it off, wait a few minutes, hold the motorcycle upright on level ground, wipe the dipstick, insert it without screwing it in, and check the level.
✓
B
Measure the oil immediately after a long ride while the engine is running and the motorcycle is on its side stand.
✓
C
Wipe the dipstick, screw it in fully, hold the motorcycle on its side stand, unscrew it, and read the level.
✓
D
Measure the oil while the engine is cold, with the motorcycle leaning on the side stand, inserting the dipstick without wiping it.
✓
QUESTION 3 / 25
What is the recommended range of drive chain slack for a standard underbone motorcycle, and where should this measurement be taken?
Choose one answer below.
A
20 mm to 30 mm, measured at the midpoint of the lower chain run between the front and rear sprockets.
✓
B
5 mm to 10 mm, measured directly underneath the rear sprocket.
✓
C
40 mm to 50 mm, measured at the top run of the chain near the swingarm pivot.
✓
D
10 mm to 15 mm, measured on the lower run while the rider is sitting on the motorcycle.
✓
QUESTION 4 / 25
When inspecting a conventional flooded lead-acid battery, what liquid should be added if the electrolyte level is below the lower limit mark?
Choose one answer below.
A
Distilled water
✓
B
Tap water
✓
C
Battery acid (diluted sulfuric acid)
✓
D
Engine coolant mixed with water
✓
QUESTION 5 / 25
Which tool should be used to measure the gap of a spark plug to ensure it meets manufacturer specifications?
Choose one answer below.
A
Wire-type or flat feeler gauge
✓
B
Vernier caliper
✓
C
Steel dial indicator
✓
D
Thread pitch gauge
✓
QUESTION 6 / 25
What is the standard spark plug electrode gap specification for a typical underbone motorcycle engine like the Honda Wave or Yamaha Crypton?
Choose one answer below.
A
0.6 mm to 0.7 mm
✓
B
1.2 mm to 1.5 mm
✓
C
0.1 mm to 0.2 mm
✓
D
2.0 mm to 2.5 mm
✓
QUESTION 7 / 25
Why must you check the tyre pressure when the tyres are cold rather than after riding?
Choose one answer below.
A
Riding heats up the air inside the tyre, causing it to expand and show a higher pressure reading than the actual cold baseline.
✓
B
Tyres shrink when warm, which compresses the internal air and causes a lower pressure reading.
✓
C
The valve stem seal only functions correctly when it is cold, preventing air leaks during measurement.
✓
D
The rubber compound of a hot tyre softens and absorbs the air, making it impossible to take a reading.
✓
QUESTION 8 / 25
What is the correct procedure for checking and adjusting the free play of a motorcycle's mechanical front brake cable?
Choose one answer below.
A
Measure the distance the lever moves before the brake begins to engage, and adjust the play using the adjusting nut at the brake hub panel.
✓
B
Tighten the adjusting nut until the wheel cannot rotate freely, then back it off exactly one half turn.
✓
C
Measure the play at the handlebar grip, and adjust it by adding spacer washers inside the brake lever pivot bolt.
✓
D
Adjust the play by changing the thickness of the brake shoes inside the drum brake assembly.
✓
QUESTION 9 / 25
What does a light tan or gray color on the insulator tip of a spark plug indicate about the engine's operating condition?
Choose one answer below.
A
The carburetor mixture and engine operating temperature are correct.
✓
B
The air-fuel mixture is running extremely rich, leading to carbon fouling.
✓
C
The engine is burning excessive oil due to worn piston rings.
✓
D
The spark plug heat range is too hot, causing the electrode to melt.
✓
QUESTION 10 / 25
Which of the following is the standard specified throttle grip free play for a standard underbone motorcycle?
Choose one answer below.
A
2 mm to 6 mm
✓
B
15 mm to 20 mm
✓
C
0 mm (no free play allowed)
✓
D
10 mm to 12 mm
✓
QUESTION 11 / 25
What is the primary danger of lubricating an O-ring drive chain with standard penetrating oil or gasoline?
Choose one answer below.
A
It dissolves the internal factory grease and degrades the rubber O-rings, leading to rapid chain wear.
✓
B
It makes the chain too heavy, reducing the top speed of the motorcycle.
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C
It increases the sprocket diameter, causing the chain to skip teeth.
✓
D
It causes the rear tire rubber to dissolve upon accidental contact.
✓
QUESTION 12 / 25
In a pre-ride safety inspection, what does the 'C' in the widely used T-CLOCS checklist represent?
Choose one answer below.
A
Controls (such as levers, cables, hoses, and throttle)
✓
B
Carburetor (checking jet alignment and float bowl height)
✓
C
Compression (verifying engine cylinder compression)
✓
D
Coolant (checking engine radiator fluid level)
✓
QUESTION 13 / 25
What is the correct procedure for lubricating mechanical control cables (e.g., clutch and front brake cables) on a motorcycle?
Choose one answer below.
A
Disconnect the cable at the lever, attach a cable luber tool, and inject cable lubricant until it flows out of the opposite end of the cable sheath.
✓
B
Spray penetrating oil onto the outside of the rubber protective sheath without disconnecting the cable.
✓
C
Soak the entire cable assembly in a bucket of used engine oil for 24 hours.
✓
D
Drip thick chassis grease onto the exposed inner wire at the handlebar lever and pump the lever rapidly.
✓
QUESTION 14 / 25
Which type of air filter element must NEVER be cleaned with solvents or compressed air, and must be replaced immediately when dirty?
Choose one answer below.
A
Viscous paper element filter
✓
B
Polyurethane foam filter
✓
C
Non-viscous dry paper filter
✓
D
Stainless steel mesh filter
✓
QUESTION 15 / 25
What is the recommended period or state for checking a motorcycle engine's valve clearances (tappet clearance)?
Choose one answer below.
A
When the engine is cold (below 35°C / room temperature) and the piston is at Top Dead Center (TDC) on the compression stroke.
✓
B
Immediately after running the engine for 30 minutes, while the components are fully expanded.
✓
C
When the piston is at Bottom Dead Center (BDC) on the exhaust stroke, while the valves are open.
✓
D
When the engine is running at idle speed, by listening for mechanical tapping noises.
✓
QUESTION 16 / 25
What is the correct way to handle and torque motorcycle cylinder head nuts/bolts during reassembly?
Choose one answer below.
A
Tighten them in a crisscross (diagonal) pattern in two or three progressive stages using a torque wrench to the specified torque.
✓
B
Tighten each bolt fully one by one, starting from the longest bolt to the shortest bolt.
✓
C
Tighten all bolts clockwise in a circle, applying maximum force with an impact wrench.
✓
D
Tighten the bolts by hand until snug, then turn each bolt exactly two full turns with a socket wrench.
✓
QUESTION 17 / 25
What does it indicate if the engine oil drained during a routine oil change appears milky-white or light brown (like coffee with milk)?
Choose one answer below.
A
Water or coolant has contaminated the engine oil.
✓
B
The oil is fresh and has not been used long enough to turn black.
✓
C
The engine is running with a fuel mixture that is too rich, washing the cylinder walls.
✓
D
The oil filter is completely clogged, bypassing unfiltered oil.
✓
QUESTION 18 / 25
What is the correct procedure for lubricating a standard drive chain after cleaning it?
Choose one answer below.
A
Apply dedicated chain lubricant directly to the inner side of the chain rollers while rotating the rear wheel by hand.
✓
B
Spray penetrating oil onto the outside plates of the chain while the motorcycle is running in gear on a stand.
✓
C
Coat the entire chain with thick grease by hand to ensure it stays protected from water.
✓
D
Spray lubricant on the rear sprocket teeth only, letting the chain absorb it during riding.
✓
QUESTION 19 / 25
When checking the engine oil level on a motorcycle, what does a level above the upper limit mark on the dipstick indicate or cause?
Choose one answer below.
A
Excess oil can be whipped into foam by the crankshaft, leading to poor lubrication and oil leaks through the breather hose.
✓
B
It is a recommended practice to provide extra lubrication for high-speed riding.
✓
C
The oil pressure will drop to zero because the oil pump becomes submerged.
✓
D
It indicates that the fuel tank is leaking into the oil sump through the carburetor vent.
✓
QUESTION 20 / 25
Which of the following is the best practice for storing a motorcycle that will not be used for more than three months?
Choose one answer below.
A
Drain the carburetor float bowl, add fuel stabilizer to the tank, inflate tires to spec, and disconnect the battery to charge it periodically.
✓
B
Keep the fuel tank empty to prevent rust and leave the battery connected so the clock stays active.
✓
C
Leave the carburetor full of fuel, start the engine once a day for 30 seconds, and park it in direct sunlight.
✓
D
Inflate the tires to double the normal pressure and drain all engine oil to prevent acid corrosion of the bearings.
✓
QUESTION 21 / 25
What is the correct method for installing piston rings on a piston, and how should their ring gaps be positioned before inserting the piston into the cylinder?
Choose one answer below.
A
Stagger the ring gaps at 120-degree or 180-degree angles relative to each other, ensuring no gaps align with the piston pin or thrust faces.
✓
B
Align all the ring gaps on the exhaust side of the piston to allow combustion gas to escape easily.
✓
C
Align all the ring gaps on the intake side of the piston to optimize the air-fuel mixture flow.
✓
D
Position the ring gaps directly over the piston pin axis on both sides of the piston.
✓
QUESTION 22 / 25
What are the typical symptoms and mechanical consequences of having valve clearances (tappet clearance) that are adjusted too tight?
Choose one answer below.
A
Hard starting when hot, loss of cylinder compression, and potential burning of the valve faces and seats.
✓
B
Excessive mechanical clattering noise from the cylinder head and increased valve lift.
✓
C
The engine running extremely rich, producing black smoke, and spark plug oil fouling.
✓
D
The drive chain slipping off the sprocket and engine oil pressure rising excessively.
✓
QUESTION 23 / 25
Which combination of measuring tools is required to accurately determine if a cylinder bore has become tapered or out-of-round?
Choose one answer below.
A
A dial bore gauge and an outside micrometer.
✓
B
A vernier caliper and a steel rule.
✓
C
A depth micrometer and a thickness gauge.
✓
D
A dial indicator and a cylinder honing tool.
✓
QUESTION 24 / 25
If a cylinder compression test yields a low reading, how can a technician perform a 'wet' compression test to isolate the cause between worn piston rings and leaking valves?
Choose one answer below.
A
Pour a small amount of clean engine oil into the spark plug hole and retest; if compression rises, the rings are worn; if it remains low, the valves or head gasket are leaking.
✓
B
Pour water into the combustion chamber and check if it bubbles out through the exhaust pipe during cranking.
✓
C
Retest compression while spraying soapy water around the outside cylinder head gasket area to look for bubbles.
✓
D
Pour fuel stabilizer into the fuel tank and crank the engine with the throttle closed to see if the reading changes.
✓
QUESTION 25 / 25
What is the function of the oil control ring (typically the bottom-most ring assembly) on a four-stroke motorcycle piston?
Choose one answer below.
A
To scrape excess lubricating oil off the cylinder wall and return it to the oil sump, preventing it from entering the combustion chamber.
✓
B
To seal the high combustion pressures inside the cylinder and prevent blow-by.
✓
C
To transfer heat from the piston crown directly to the cylinder cooling fins.
✓
D
To spray oil upward toward the piston pin to lubricate the small end of the connecting rod.
✓
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