some radio aids and instrument question
Aviator mates need some help with couple of question i am stuck with,your help will be really appreciated.
Q1. The time from transmission of interrogation pulse to the receipt of the reply from DME ground is 2000microsecs{ignore delay in dme}The slant range is:
a. 330nm
b. 185nm
c. 165nm...ANS
d. 370nm
Q2.Flying an ILS approach with 3degree glideslope referenced to 50feet above threshold,an a/c at4.6nm should be at approximate height of:
a. 1400ft
b. 1380ft
c. 1500ft
d. 1450ft......ANS
{acc. to me the ans should be height=glide path angle*range*100feet=3*4.6*100feet=1380feet i.e. B option but that is not the answer plz explain.}
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INSTRUMENT QUESTIONS
Q3.An a/c is fitted with 2 altimeters.One is corrected for position error,the other is not corrected for position error.
a.Provided that ADC is working normally,there will be no error to either altimeter
b.at high speed the non-compensated altimeter will show lower altitude
c.at high speed the non-compensated altimeter will show higher altitude
(ANS is {c}....but i think ans should be {b}...please explain.)
Q4.A low altitude Radio altimeter used in precision approaches,following characteristics:
1. 1540mhz to 1660mhz range
2. pulse transmission
3. frequency modulation
4. height range between 0-5000feet
5.accuracy of +/-2ft between 0-500ft.
a. 1,4,5
b 3,4.....ANS...
c 3,5
d 2,3,5
{The height range of radio altimeter is from 50-2450 feet}explain,.....acc. to me and should be {c})
thanks
Q3.