Why are manhole covers round?
Submitted by: AdministratorThis is a classic brainteaser, which was reportedly first asked by a Microsoft interviewer. Here's how to ""solve"" this brainteaser (remember to speak and reason out loud while solving this brainteaser): Why are manhole covers round? Could there be a structural reason? Why aren't manhole covers square? It would make it harder to fit with a cover. You'd have to rotate it exactly the right way.
The pipes below are also round, so fitting them might be easier, as might be making them. So many manhole covers are round because they don't need to be rotated. There are no corners to deal with. Also, a round manhole cover won't fall into a hole because it was rotated the wrong way, so it's safer. Looking at this, it seems corners are a problem. You can't cut yourself on a round manhole cover. And because it's round, it can be more easily transported. One person can roll it.
Submitted by: Administrator
The pipes below are also round, so fitting them might be easier, as might be making them. So many manhole covers are round because they don't need to be rotated. There are no corners to deal with. Also, a round manhole cover won't fall into a hole because it was rotated the wrong way, so it's safer. Looking at this, it seems corners are a problem. You can't cut yourself on a round manhole cover. And because it's round, it can be more easily transported. One person can roll it.
Submitted by: Administrator
Read Online Atomic Physics Teacher Job Interview Questions And Answers
Top Atomic Physics Teacher Questions:
☺ | Why did you leave your last job As Atomic Physics Teacher? |
☺ | Tell me an occasion when you needed to persuade someone to do something? |
☺ | What do you like to do outside of work? |
☺ | What makes a product successful? |
☺ | What's a time you disagreed with a decision that was made at work? |
Top Teaching Categories
☺ | English Teacher Interview Questions. |
☺ | ICT Teacher Interview Questions. |
☺ | Physics Teacher Interview Questions. |
☺ | Preschool Teacher Interview Questions. |
☺ | Teaching Assistant Interview Questions. |