Technicians in the motor pool parked several diesel transport trucks outside overnight in sub-zero temperatures. The following morning, the drivers turned the ignition keys, but the engines cranked sluggishly and failed to start. After the maintenance crew wheeled portable heaters into the staging bay and directed warm air onto the fuel tanks and engine blocks for thirty minutes, each vehicle started on the first attempt.
What most likely caused the trucks' initial failure to start?
- AThe application of warm air from portable heaters
- The prolonged exposure to freezing overnight temperaturesCevap
- CA mechanical defect inside the portable heaters
- DThe sluggish cranking of the ignition system
Cevap
The prolonged exposure to freezing overnight temperatures
The passage describes trucks failing to start after exposure to sub-zero temperatures and functioning normally once warmed. This sequence logically implies that the freezing conditions caused the starting failure.
Adım Adım Çözüm
Anahtar Kavram
Recognizing Implied Cause and Effect
Tahmini Süre:45s