【单选题】【消耗次数：1】
下列不属于塔式起重机安全防护装置的是（）
①
A限位开关（限位器）
②
B钢丝绳防脱装置
③
C风速计
④
D驱动装置
参考答案：
复制
纠错
相关题目
【判断题】
轨道运行的塔式起重机，每个运行方向应设置限位装置，限位装置由限位开关、缓冲器和终端止挡组成。根据《塔式起重机》（GB/T5031），限位开关动作后，应保证塔式起重机停车时其端部距缓冲器的最小距离为700mm。
①
正确
②
错误
【单选题】
下列满足塔式起重机正常使用条件的是（）
①
A工作环境温度42℃
②
B安装架设时塔式起重机顶部3s时距平均瞬时风速15m/s
③
C工作状态时塔式起重机顶部3s时距平均瞬时风速18m/s
④
D海拔高度1200m
随机题目
【单选题】
The number of people invited ____fifty, but a number of them _____absent.
①
were; was
②
was ; was
③
were
④
were; were
【单选题】
The box is _____what I saw in the shop.
①
same as
②
the same like
③
the same that
④
the same as
【单选题】
In the past he often made his sister___, but now he is often made __by his sister.
①
to cry; to cry
②
cry
③
to cry; cry
④
cry; to cry
【单选题】
The reason __he was absent from the meeting was _his car broke down on the way.
①
that; because
②
why; that
③
that; that
④
for; that
【单选题】
What do you think _____solve the problem ?
①
you can do
②
can you do
③
you can do to
④
can you do to
【单选题】
We need fifteen more people _____our team to do the job.
①
but
②
except
③
as well
④
besides