terry

On Apr 17, 9:30 pm, "Barry" <a...@b.c> wrote:
> > I am confused by this practice commercial nav question. ( at least I
> > am confused by the answer in the book which was b. but I think both a
> > and c are correct), but I appreciate some other opinions.
>
> > Day 1 Altimeter reads elevation of 1390 feet with 1013 HPa set on
> > subscale
> >         ( thats equivalent to 29.92 inches of Hg for the US folks)
> > Day 2 Altimeter reads elevation of 1000 feet
> > Assuming the altimeter subscale was not changed between day 1 and day
> > 2 it could be said that
>
> > a. The QNH is higher on day 2
> > b. The QNH is lower on day 2
> > c. The pressure altitude at the airport is lower on day 2
> > d.  The atmospheric pressure at the aerodrome has not changed.
>
> I agree with you - answers a and c are both correct.  Day 2 QNH is about 1026.

Yep, thats what I get
Thanks