Instruments 1

In an unpressurized aircraft if the pilot suspects that the static port has become blocked then she should

• open the alternate static port 

• turn on carburetor heat

• not use the attitude indicator 

• turn on pitot Heat

If the pitot tube were to become blocked, then this might affect 

• only the ASI 

• The heading indicator and attitude indicator 

• the ASI, altimeter and VSI 

• the altimeter and VSI 

If the static port were to become blocked, then this might affect

• The Heading indicator and attitude indicator

• the altimeter and VSI

• the ASI, altimeter and VSI

• only the ASI

The static port on a pressurized aircraft is best mounted

• outside the aircraft in such a way that air is not forced into it as the aircraft flies

• within the cockpit close to the pitot static instruments

• on the wing facing directly into the airflow as far from the fuselage as possible

• inside the passenger cabin

The pitot tube on an aircraft blocks while it is in a 500 ft per minute climb at 120 knots. What effect will this have on the ASI?

•  it will have no effect as the ASI is not connected to the pitot tube, only the static port

•  the ASI will continue to record 120 knots

•  The ASI will indicate an increase in airspeed

•  the ASI will indicate a decrease in airspeed

 The basic principle of a conventional VSI is

• firing a beam of radio energy downwards from the bottom of the fuselage and using the Doppler effect to measure how fast the aircraft's altitude is changing

•  integrating the altitude information being transmitted by the aircraft's transponder

•  a microprocessor integrating the changes in the altimeter reading over periods of 5 and 10 seconds and displays the resulting value

•  making a measurement of the rate at which air passes into or out of a container through a controlled leak

 The pitot tube on an aircraft blocks while it is in a climb at a constant speed of 100 knots. What effect will this have on the VSI?

•  the VSI will indicate that the aircraft is flying level

•  the VSI will freeze at the value it had before the blockage

• it will have no effect

•  the VSI will indicate a descent

An aircraft is climbing at 400 ft per minute at 100 knots when the static Port blocks. How will this affect the altimeter?

•  it will have no effect at all

•  it will cause it to remain at the altitude the aircraft was at when the blockage occurred

•  it will cause it to show a slowly decreasing altitude

   

• it will cause it to read zero (sea-level)

A pilot correctly sets his altimeter and takes off from an Aerodrome and climbs several thousand feet. Which of the following conditions might cause his altimeter to overread (display an altitude higher than he actually is)?

•  a very humid day

•  a very cold day

•  a very hot day

•  a day with limited visibility

A blind encoding altimeter is an

• encoded feed from a conventional altimeter used to provide input to the transponder

•  altimeter that is only accurate when set to the local atmospheric pressure

•  altimeter that broadcasts an encoded version of the aircraft's altitude

•  altimeter without a display that feeds a coded version of the aircraft's altitude to the transponder and GPS