第21题:[多选题]B-B-A-0264 7 2 设备检査的意义()» A. 科学检査 B. 保证安全生产 C. 改善生产条件 D. 提高经济效益 参考答案:BCD
第22题: [单项选择]Which of the following may lead to the engine NOT to start on air?() A. starting air pressure too high B. correct timing of starting air valves C. three of the six starting valves stuck D. the turning gear disengaged 参考答案:C