更多"High pressure and low pressure alar"的相关试题:
[单项选择]When you are making a high potential test on a piece of repaired electrical machinery, a rise in leakage current indicates （）.
A. good insulation
B. bad insulation
C. high insulation power factor
D. a high slot discharge factor
[单项选择]The period at high or low tide during which there is no change in the height of the water is called the （）.
A. range of the tide
B. plane of the tide
C. stand of the tide
D. reversing of the tide
[单项选择]High firing pressures and a low exhaust temperature in a diesel engine may result from （）.
A. decreased piston to cylinder head clearance
B. increased exhaust system back pressure
C. early fuel injection timing
D. low scavenge air temperature
[单项选择]What separate the high pressure side from the low pressure side in a refrigeration system?（）
A. Condenser and thermal expansion valve
B. King and solenoid valves
C. Compressor and thermal expansion valve
D. Condenser and solenoid valve
[单项选择]Low cylinder compression pressure and a high exhaust temperature may indicate （）
A. early fuel injection timing
B. leaking valves
C. a continuously open scavenge air port
D. low cooling water temperature
[单项选择]High cylinder firing pressure, accompanied by low exhaust temperature, can result from （）
A. improper fuel rack positing
B. lengthy exhaust valve duration
C. extend operation at light load
D. excessively early injection timing
[单项选择]The difference between the heights of low and high tide is the（）.
A. period
B. range
C. distance
D. depth
[单项选择]If both the “high level” and “low level” alarms come on for the same address of a centralized control console, the most likely problem is a/an （）.
A. sensor failure
B. failed alarm
C. low level
D. extremely high level
[单项选择]（） pistons have low inertia and high coefficient of thermal expansion.
A. Cast iron
B. Cast steel
C. Forged steel
D. Aluminum
[单项选择]风挡排雨系统风挡雨刷的工作由P5板底部的三位旋钮(HIGH,LOW,OFF)控制：（）
A. HIGH位马达线圈串联, LOW位马达线圈并联，OFF位马达反转到停留位后断电
B. HIGH位马达线圈并联, LOW位马达线圈串联，OFF位马达反转到停留位后断电
C. HIGH位马达线圈并联, LOW位马达线圈串联，OFF位马达正转到停留位后断电
D. HIGH位马达线圈串联, LOW位马达线圈并联，OFF位马达正转到停留位后断电
[单项选择]The device used for low-pressure control and high-pressure cutout on a compressor is called a（）
A. cutout
B. pressure controller
C. controller switch
D. cutout switch
[单项选择]在linux系统中，用命令rmdir删除/test/test1目录，当/test目录为空时，希望一并删除，以下要用到的参数是（）。
A. r
B. R
C. p
D. f
[简答题]离线LOW-E与在线LOW-E的优缺点？
[单项选择]在linux系统中，将文件/tmp/test1和/tmp/test2压缩到/tmp/test.gz，正确的命令是（）。
A. tar -czvf test1 test2 test.gz
B. tar -czvf test.gz test1 test2
C. tar test.gz test1 test2
D. tar test1 test2 test.gz
[单项选择]在linux系统中，删除/test/test1目录，当/test目录为空时，希望一并删除，以下命令中正确的是（）。
A. rmdir -r /test/test1
B. rmdir -p /test/test1
C. rmdir -R /test/test1
D. rmdir -l /test/test1
[名词解释]统计检验 statistical test
[单项选择]测试机组氧气系统气流时，RESET-TEST手柄放TEST位：（）
A. 流量指示器猫眼应闭合
B. 流量指示器猫眼应张开
[名词解释]耐量试验 tolerance test
