During the in-cab inspection, what should the driver check regarding gauges and controls?

The IN-CAB INSPECTION phase of the pre-trip check verifies that all cab equipment is functional before the vehicle leaves the yard. WHAT TO CHECK: GAUGES: Oil pressure — should come up within seconds of engine start; if no oil pressure within 5-10 seconds, shut down immediately; Coolant temperature — should rise to normal operating range (usually 160-200°F) and stay there; Voltmeter/ammeter — should show charging (alternator working); Air pressure gauges (if air brakes) — build rate, operating range 90-130 psi; Engine warning lights — verify they lit at key-on and then extinguished after engine start (if any remain on, investigate before driving); CONTROLS: Steering wheel — check for excessive play (more than 2 inches at the rim for a 20-inch wheel is too much); Accelerator — smooth, full travel, returns when released; Clutch — proper free play, doesn't drag; Service brakes and parking brakes — test; VISION: Mirror adjustment (all mirrors, both sides); Windshield — clean, no chips in critical vision area; Wipers work; defroster works; SAFETY EQUIPMENT: Fire extinguisher present and charged; emergency triangles (3) present; spare fuses if not circuit breakers; first-aid kit if required. DOCUMENT: Most operations require completion of a pre-trip inspection report (DVIR — Driver Vehicle Inspection Report); keep this for 24 hours in the cab.