We offered RACER.com readers the chance to send in questions for IndyCar's president of operations and competition, Derrick Walker [ @DJWIndyCar ] and we're serializing his replies according to topic. Today, Derrick answers your questions on IndyCar procedure, ranging from standing starts to oval qualifying to unapproved engine changes. •...

We offered RACER.com readers the chance to send in questions for IndyCar's president of operations and competition, Derrick Walker [ @DJWIndyCar ] and we're serializing his replies according to topic. Today, Derrick answers your questions on IndyCar procedure, ranging from standing starts to oval qualifying to unapproved engine changes. Can...