examination may be incomplete with the applicant neither passing nor failing.
He may not pass until he has successfully completed each part of the
examination separately. He must fail as soon as he demonstrates he is unable to
pass. The examination is incomplete, therefore, when it is discontinued for
some reason other than the applicant's lack of ability. For example, when a
motorcycle runs out of gas, has a puncture or otherwise fails to function
during the traffic examination, the examination is discontinued, but the driver
is not disqualified.