1- A room in your house in which you receive guests?
Living room; lounge.
2-When you cause the machine to not work any more, what is the verb that you use? Example: She................the washing machine. It is defective now.
To break; 'she broke'
3-That hump-like thing which traffic people construct on roads with the aim to have cars cut off their speed?
Speed bump; road hump; sleeping policeman