Which of the following is checked as part of post-start checks?

• A. Cooling fan speed
• B. Gauges
• C. Gearbox lubrication
• D. Engine pre-start noise

Answer: (B)

Post-start checks focus on confirming the machine is operating safely once the engine is running. The most important part of these checks is looking at the gauges. They show vital information like oil pressure, coolant temperature, hydraulic or transmission pressures, and fuel level, and they help you confirm that everything is within normal limits and no warning lights are active. If any gauge reads abnormally, you should stop and investigate before continuing.

Other options relate to checks done at different times or under different circumstances. Cooling fan speed isn’t typically a primary post-start check—it's more about ensuring the cooling system is functioning properly as part of broader operation. Gearbox lubrication is usually checked as part of pre-start or routine maintenance to ensure there’s enough oil and no leaks. Engine pre-start noise is specifically something you assess before starting the engine to catch obvious issues.