Ovality and Taper Guages are used

The job holding chuck out of roundness or the non rigid tool clamping(holding) may be one of a major cause of ovality during turning operation. SOme times when job is hold between centre, the centre OOR(Out of roundnedd) is also cause of ovality in turning.

twice of the value of circular tolerance

It is about 14 days after your last period ended. Here's a good site: http://www.fertilityfriend.com/p/163/index14.html?gclid=CNDdwsGw3JACFQqwQwodKhvUWA It will help you to calculate when you ovulate because everyone is different

it may be due to loss of compression.the cylinder liner may have become oval,combustion is not complete so check the ignition timing.check the ovality of liner.with the use of a 'feeler gauge' check the clearance between liner & piston rings.