Final answer:
To test hydraulic brakes for leaks, you can use a combination of methods: using a pressure gauge, leak detection solution, and visual inspection. Therefore, the correct answer is All of the above.
Step-by-step explanation:
To test hydraulic brakes for leaks, you can use a combination of methods:
1) Using a pressure gauge: Connect the pressure gauge to the brake system and check if there is any drop in pressure, which could indicate a leak.
2) Using a leak detection solution: Apply a leak detection solution to the brake system and look for any bubbles or signs of leakage.
3) Using a visual inspection: Check the brake system visually for any signs of fluid leakage, such as wet spots or stains.
Therefore, the correct answer is All of the above.