Which gauge rises to normal after starting the engine?

• A. Coolant temperature gauge
• B. Oil pressure gauge
• C. Fuel gauge
• D. Tachometer

Answer: (A)

This question tests how gauges reflect engine warm-up after starting. When the engine is cold at startup, the coolant is cold, so the coolant temperature gauge sits low. As the engine runs, combustion warms the coolant, the thermostat allows circulation, and the gauge rises toward the normal operating range, signaling the engine has reached its typical temperature for efficient operation.

Other gauges monitor different things: oil pressure indicates lubrication pressure, which doesn’t directly map to how warm the engine is; the fuel gauge shows how much fuel remains; and the tachometer shows engine speed, which can rise to idle but doesn’t specifically indicate that the engine has reached normal operating temperature.