VIENIDMY Sign in Start practicing

Home › Sample questions › Automobile Maintenance (SSW 2)

Tokutei Ginou 2 Automobile Maintenance practice test with answers – free sample questions

自動車整備分野（2号）

10 sample questions in the real exam format, with furigana, English translation, answers and explanations. Tap "Show answer" under each question. For the full question bank and realistic mock exams, open the free app.

Question 1

In the engine heat balance and loss classification diagram shown, which combination correctly identifies loss A subtracted from indicated work and output B taken from the crankshaft?

In the engine heat balance and loss classification diagram shown, which combination correc
  1. A.
    A: Exhaust loss — B: Indicated output
  2. B.
    A: Mechanical loss — B: Brake shaft output
  3. C.
    A: Cooling loss — B: Friction output
  4. D.
    A: Radiation loss — B: Theoretical output
Show answer

Correct answer: B

The work generated inside the cylinder is indicated work (indicated output). Subtracting mechanical loss A (friction of pistons and bearings, accessory drive loss for water/oil pumps and alternator, plus pumping loss) yields the net power taken from the crankshaft, which is brake shaft output B.

💡 Engine loss rule: Thermal loss includes cooling and exhaust losses; Mechanical loss includes friction, accessory drive, and pumping losses. Brake shaft output equals Indicated output minus Mechanical loss.

WordMeaning
heat balance
indicated work
mechanical loss
brake shaft output

Question 2

Which of the following statements concerning pistons and piston rings is INCORRECT?

  1. A.
    The compression ring maintains combustion chamber gas tightness and transfers heat from the piston to the cylinder wall.
  2. B.
    A taper-face compression ring has a slight inclination on its outer periphery and is mainly used as the second ring.
  3. C.
    Scuffing refers to the phenomenon in which the ring vibrates violently up and down in the ring groove at high engine speeds, causing poor sealing.
  4. D.
    An offset piston has the center of its piston pin hole slightly shifted toward the thrust side from the piston centerline to reduce piston slap noise.
Show answer

Correct answer: C

Violent up-and-down vibration of the piston ring inside its groove at high rotational speeds is called ring fluttering. Scuffing occurs when the lubricating oil film on the cylinder wall breaks down, causing direct metal-to-metal contact and scratch marks on the ring and cylinder wall.

WordMeaning
compression ring
taper-face type
scuffing phenomenon
fluttering phenomenon

Question 3

Which of the following statements concerning the characteristics of a lead-acid battery is INCORRECT?

  1. A.
    The final discharge voltage when discharged at the 5-hour rate is generally 1.75V per cell.
  2. B.
    When the electrolyte temperature is constant, the electromotive force is greater at a specific gravity of 1.280 than at 1.200.
  3. C.
    The specific gravity of the electrolyte varies with temperature, decreasing by about 0.0007 for every 1℃ rise in temperature.
  4. D.
    At electrolyte temperatures below 50℃, the battery capacity decreases as the electrolyte temperature becomes higher.
Show answer

Correct answer: D

At electrolyte temperatures below 50℃, higher temperature lowers electrolyte viscosity and speeds up diffusion into the plate pores, so battery capacity increases as temperature rises (conversely, capacity drops sharply in cold weather).

💡 Lead-acid battery rule (below 50℃): Higher temperature or higher specific gravity INCREASES both electromotive force and battery capacity; final discharge voltage is 1.75V per cell.

WordMeaning
lead-acid battery
final discharge voltage
electrolyte
electromotive force

Question 4

Which of the following statements concerning sensors used in an electronically controlled gasoline fuel injection system is CORRECT?

  1. A.
    The vacuum sensor (manifold absolute pressure sensor) has the characteristic that its output voltage increases as intake manifold absolute pressure increases.
  2. B.
    A zirconia O2 sensor generates an electromotive force of about 1V when the oxygen concentration difference between its inner and outer surfaces becomes small.
  3. C.
    A hot-wire air flow meter detects intake air volume flow rate and therefore requires density correction based on intake air temperature.
  4. D.
    A piezoelectric knock sensor utilizes the characteristic that its internal electrical resistance decreases as cylinder block vibration increases.
Show answer

Correct answer: A

A vacuum sensor (MAP sensor) measures absolute pressure in the intake manifold; as throttle opening increases and manifold absolute pressure rises, its output voltage increases proportionally. A zirconia O2 sensor generates about 1V when the oxygen difference is large (rich mixture); a hot-wire air flow meter directly measures intake air mass; a piezoelectric knock sensor generates voltage directly via the piezoelectric effect.

WordMeaning
vacuum sensor
intake manifold pressure
zirconia O2 sensor
air flow meter

Question 5

Which of the following statements concerning the lock-up mechanism and components of an electronically controlled automatic transmission (AT) is INCORRECT?

  1. A.
    The lock-up piston incorporates damper springs to absorb and cushion engine torque fluctuations during direct engagement.
  2. B.
    The lock-up piston is splined to the hub of the turbine runner so that it can slide in the axial direction.
  3. C.
    A wet multi-plate clutch incorporates a dish plate to cushion engagement shock when the clutch is applied.
  4. D.
    When the lock-up piston moves away from the front cover, the pump impeller and turbine runner are mechanically coupled.
Show answer

Correct answer: D

The lock-up clutch mechanically couples the front cover (pump impeller) and turbine runner only when hydraulic pressure presses the lock-up piston tightly AGAINST the front cover. When the piston moves away from the front cover, lock-up is disengaged and power is transmitted hydrokinetically through the fluid.

WordMeaning
lock-up mechanism
damper spring
turbine runner
dish plate

Question 6

Which of the following statements concerning tire characteristics and terminology is CORRECT?

  1. A.
    Static loaded radius is the shortest distance from the axle center to the ground contact surface when a tire inflated to specified pressure is placed vertically on a flat plate under specified load.
  2. B.
    Tire rolling resistance decreases as tire air pressure drops below the specified value because tire deformation becomes smaller.
  3. C.
    Static vertical spring constant refers to the vertical load required to produce a vertical deflection of 10mm in a stationary tire.
  4. D.
    A tire with a larger static vertical spring constant absorbs road shocks more softly and provides better ride comfort.
Show answer

Correct answer: A

Static loaded radius is the shortest vertical distance from the wheel center to the contact patch under specified inflation pressure and load. Lower air pressure increases tire deformation and rolling resistance. The static vertical spring constant is the load per 1mm of vertical deflection (unit: N/mm, not 10mm), and a higher value means a stiffer tire with harsher ride comfort.

WordMeaning
static loaded radius
rolling resistance
static vertical spring constant
ground contact surface

Question 7

What is the compression ratio of an engine with a stroke volume (displacement) per cylinder of 450cm³ and a combustion chamber volume of 50cm³?

  1. A.
  2. B.
  3. C.
  4. D.
Show answer

Correct answer: C

Compression ratio formula: Compression ratio = (Stroke volume + Combustion chamber volume) / Combustion chamber volume. Substituting the values: (450 + 50) / 50 = 500 / 50 = 10.0. A common mistake is dividing 450 by 50 to get 9.0 without adding the combustion chamber volume to the numerator.

💡 Compression ratio formula: (Stroke volume + Combustion chamber volume) / Combustion chamber volume = (Vh / Vc) + 1. Always remember to add the combustion chamber volume in the numerator.

WordMeaning
stroke volume
combustion chamber volume
compression ratio
top dead center

Question 8

Regarding standalone component resistance measurement using a circuit tester, which preparation is appropriate when measuring the horn relay coil resistance as shown in the figure?

Regarding standalone component resistance measurement using a circuit tester, which prepar
  1. A.
    Remove the relay from the vehicle circuit and measure it as an isolated component with no voltage applied.
  2. B.
    Leave the vehicle connector attached and measure the resistance while battery voltage is applied to the coil.
Show answer

Correct answer: A

When measuring resistance (Ω) with a circuit tester, the component must always be disconnected from any power source. Measuring resistance on a live circuit with battery voltage applied causes inaccurate readings and can damage the tester.

WordMeaning
circuit tester
standalone resistance measurement
horn relay
coil resistance

Question 9

From the digital circuit tester display measuring the coil resistance between terminals 1 and 2 of the horn relay shown in the figure (standard value: 60 to 90Ω), which combination of resistance value and pass/fail judgment is appropriate?

From the digital circuit tester display measuring the coil resistance between terminals 1
  1. A.
    75.0Ω · Fail (否)
  2. B.
    75.0Ω · Pass (良)
  3. C.
    7.5Ω · Fail (否)
  4. D.
    750Ω · Fail (否)
Show answer

Correct answer: B

The digital multimeter screen displays 75.0 with the unit Ω (75.0Ω). Since 75.0Ω falls within the specified standard range of 60 to 90Ω, the component is judged as Pass (良).

WordMeaning
terminal
standard value
resistance value
pass/fail judgment

Question 10

During standalone inspection of a stop lamp switch, measuring the terminal resistance with the switch pushed ON (standard value: 1.0Ω or less) produced the tester display shown in the figure. Which combination of measured value and pass/fail judgment is appropriate?

During standalone inspection of a stop lamp switch, measuring the terminal resistance with
  1. A.
    48.5Ω · Pass (良)
  2. B.
    0.48Ω · Pass (良)
  3. C.
    48.5Ω · Fail (否)
  4. D.
    4.85Ω · Fail (否)
Show answer

Correct answer: C

The multimeter displays 48.5Ω. Because the standard resistance when the switch is ON is 1.0Ω or less, a reading of 48.5Ω indicates excessive contact resistance inside the switch and is judged as Fail (否).

WordMeaning
stop lamp switch
standalone inspection
contact resistance
measured value
Practice the full question bank and mock exams in the app

Lessons: Automobile Maintenance (SSW 2)

Zalo