单项选择题

The system will include various （） such as low tank level alarms and remote operation of tank outlet valves in the events of a fire.

A.Switches
B.panels
C.alarm units
D.safety devices

点击查看答案&解析

上一题目录下一题

相关考题

单项选择题

Electric insulation is made of organic substances and so gradually （） with age.

A.deteriorates
B.increases
C.are fouled
D.becomes better

单项选择题

On commonly used ships,if two A√Cgenerators are operated in parallel, the load is distributed evenly by （）.

A.varying the D-Cexciter voltage
B.varying the reluctance of the air gap
C.regulating the speed of prime mover
D.shorting out part of the armature windings

单项选择题

Moisture in a D-Cmotor would cause （）.

A.short circuit
B.speed up
C.slow down
D.hunting