问题 问答题 简答题

在泵站电气设备中电缆的完好标准是什?

答案

参考答案:

(1)橡套电缆无明显损伤,不露出芯线绝缘或屏蔽层,护套损伤伤痕深度不超过厚度1/2,长度不超过20mm(或沿周长1/3),无老化现象。

(2)电缆标志牌齐全,改变电缆直径的接线盒两端、拐弯处、分岔处及沿线每隔200m均应悬挂标志牌,注明电缆编号、电压等级、截面积、长度、用途等项目。

(3)电缆接线盒零部件齐全完整,无锈蚀、密封良好。

(4)电缆上部无淋水(有淋水必须采取防护措施)。

(5)电缆应用吊钩(卡)悬挂,橡套电缆严禁用铁丝悬挂。

(6)电缆悬挂整齐、不交叉、不落地,应有适当松弛度,在承受意外时能自由坠落。悬挂高度应在矿车掉道时不致碰撞,在电缆坠落后,不致落在道轨或运载机械上。

(7)电缆悬挂的间距:在水平或倾斜巷道内不得超过3m。

(8)不得超负荷运行,接头温度不得超过60℃。

(9)工作电压应与电缆额定电压相符,千伏级以上橡套电缆在井下使用时,应采用不延燃屏蔽电缆。

(10)运行中电缆不应盘圈成“∞”字形(屏蔽电缆、采煤机电缆除外)。

(11)巷道内的电话和信号电缆应与电力电缆分别挂在巷道的两侧,至少应距电力电缆300mm以上,并挂在电力电缆的上面。高、低压电缆的间距不小于100mm,同等电压电缆之间的距离应不小于500mm。

(12)接线盒的额定电压与电缆使用电压相符。

(13)橡套电缆接头温度不得超过电缆温度。

(14)电缆绝缘电阻:6kV-100MΩ/km;1140V-50MΩ/km;600V-10MΩ/km。

(15)接地装置符合规定。

选择题
阅读理解

Bugs Bunny's Hoping Carrot Hunt
In this game you are Bugs Bunny.and your goal is to reach the finish line.A carrot truck has spilled its cargo! Gather as many carrots as you can, and when you get the big carrot, you'll be able to jump even higher!
Instructions: Use the mouse to move Bugs left and right, and click to jump a gap while   gathering carrots.
Category: Action 
 
Mushroom Madness
You are in charge of protecting several farms.It's up to you to make sure the mushrooms there reach maturity before the animals in the forest get their hands on them.Use your swatter(苍蝇拍)to fight off anything that comes near them; use heavier weapons if necessary.
Instructions:Slap any creature that conies near your mushrooms.Use the mouse to control the swatter.If you see a "power up", click to use it.Collect coins to buy upgrades after each level.
Category: Action
 
Rudolph's Kick and Fly
Santa's little helpers have worked all year preparing for Christmas.When Santa finally leaves to deliver his presents, the elves(精灵)head down to the snowfields with Rudolph, the reindeer, to play their favorite game: Kick and Fly!
Instructions:  1.Use the mouse to aim, and click to launch an elf.
2.While in the air, click again to catch, and to gain extra height.
3.The goal is to collect as many Christmas ornaments(装饰物)possible, and get 10    points for each one.
Tips: If you're heading towards an obstacle(障碍), be sure to avoid it!
Category: Action 
 
Click Flick
Your mission is to save chicks falling from the sky.Use your trampoline (蹦床) to bounce them up and direct them into a nest.But hurry—if you don't, many chicks will fall and lose their lives.There will be falling bombs, worms, nuts and eggs and you can get extra points by collecting the worms and nuts.Save the amount of chicks shown to unlock the next level!
Instructions: Move the chicks left and right using keys or the mouse.
Category: Adventure
 
小题1:The main purpose of the passage is to ___________.
A.tell us different categories of games
B.ask us to decide which game is the best
C.introduce several interesting computer games
D.let us evaluate whether we are interested in the games
小题2:If a player has collected some worms and nuts, he ____________.
A.is playing Mushroom MadnessB.will lose the game quite soon
C.will get 10 points for each oneD.will get extra points and get ahead
小题3:Which of the following statements about the games is TRUE according to the
passage?
A.Bugs Bunny needs to be fast to win.
B.All four games are in the same category.
C.Players can only use the mouse to control the targets.
D.The number of elves decides whether a player wins in Rudolph's' Kick and Fly.
小题4:If a player wants to become stronger to drive animals away, he should try to _____.
A.find a "power up" or use heavier weapons
B.collect falling bombs as quickly as possible
C.click the elf while it's in the air
D.get the big carrot while running
小题5:In which game are there obstacles you must avoid?
A.Bugs Bunny's Hopping Carrot Hunt.B.Mushroom Madness.
C.Rudolph's Kick and Fly.D.Click Flick.