There's a difference between a fire engine and a fire truck, despite the fact that the terms are often used interchangeably. A fire engine typically transports the water necessary to fight fires until firefighters can access a fire hydrant, while fire trucks carry the ladders and other important equipment.
Oh Oh Oh...! I remember one. Don't know why they call it that, but, a Free Martin is a female calf twin born with a male. It will be sterile. So if you are into buying a heifer, make sure it was not a twin.