Instrument Ground School Flashcards
Written Test Prep
One characteristic that a properly functioning gyro depends upon for operation is?
- Deflecting force developed from the angular velocity of the spinning wheel.
- Resistance to deflection of the spinning wheel or disc.
- Ability to resist precession 90 degrees to any applied force.
Answer: (2.) resistance to the deflection of the spinning wheel or disc
Explanation:
Any rotating body exhibits gyroscopic properties according to Newton’s laws of motion. The first law states: a body at rest will remain at rest; or if in motion in a straight line, it will continue in motion in a straight line unless acted upon by an outside force. The second law states: the deflection of a moving body is proportional to the deflective force applied and is inversely proportional to its weight and speed. A gyro is a wheel or disc designed to utilize these principles.
Altimeter setting is the value to which the scale of the pressure altimeter is set so the altimeter indicates?
- Pressure altitude at field elevation.
- True altitude at field elevation.
- Pressure altitude at sea level.
Answer: (2) True altitude at field elevation.
Explanation:
The altimeter setting broadcast by each Flight Service Station is a computed correction for nonstandard surface pressure only, for a specific location and elevation. Consequently, altimeter indications based upon a local altimeter setting indicate true altitude at field elevation.
During recoveries from unusual attitudes, level flight is attained the instant?
- The horizon bar on the attitude indicator is exactly overlapped with the miniature airplane.
- A zero rate of climb is indicated on the VSI.
- The altimeter and airspeed needles stop prior to reversing their direction of movement.
Answer: (3) The altimeter and airspeed indicator needles stop prior to reversing their direction of movement.
Prior to starting an engine, you should check the turn-and-slip indicator to determine if the?
- needle is approximately centered and the tube is full of fluid.
- ball will move freely from one end of the tube to the other when the aircraft is rocked.
- needle indication properly corresponds to the angle of the wings or rotors with the horizon.
Answer: (1) needle is approximately centered and the tube is full of fluid.
If a half-standard rate turn is maintained, how long would it take to turn 135°?
- 1 minute.
- 1 minute 20 seconds.
- 1 minute 30 seconds.
Answer: (3) 1 minute and 30 seconds
Explanation:
A standard rate turn is one during which the heading changes 3° per second. In this case, the aircraft is turning one-half that rate, or 1.5° per second. Therefore, a turn of 135° would require 135/1.5 or 90 seconds (1 minute 30 seconds).
What should be the indication on the magnetic compass as you roll into a standard rate turn to the left from an east heading in the Northern Hemisphere?
- The compass will initially indicate a turn to the right.
- The compass will remain on east for a short time, then gradually catch up to the magnetic heading of the aircraft.
- The compass will indicate the approximate correct magnetic heading if the roll into the turn is smooth.
Answer: (3) The compass will indicate the approximate correct magnetic heading if the roll into the turn is smooth.
When you are on a east or west heading, the compass indicates correctly as you start a turn in either direction.
What force causes an airplane to turn?
Horizontal lift component.
An aircraft requires a sideward force to make it turn. In a normal turn, this force is supplied by banking the aircraft so that lift is exerted inward as well as upward. The horizontal lift component is the sideward force that causes the aircraft to turn.
What CAS must be used to maintain a filed TAS of 180 knots at 12,000 MSL if the outside air temperature is +5 degrees C?
- 154 KCAS.
- 147 KCAS.
- 150 KCAS.
147 KCAS.
If a standard rate turn is maintained, how much time would be required to turn to the left from a heading of 090° to a heading of 300°?
- 40 seconds.
- 30 seconds.
- 50 seconds.
50 seconds
During flight if the pitot tube becomes clogged with ice, which of the following instruments would be affected?
airspeed indicator only
What is the third fundamental skill in attitude instrument flying?
- Power control.
- Instrument cross-check.
- Aircraft control.
Aircraft control.
The three fundamental skills involved in all instrument flight maneuvers are: 1. Instrument cross-check. 2. Instrument interpretation. 3. Aircraft control.
What CAS must be used to maintain a filed TAS of 160 knots at 11,000 MSL if the outside air temperature is +5 degrees C?
- 129 KCAS.
- 139 KCAS.
- 133 KCAS.
Answer: 133 KCAS
The advancement of avionics in light general aviation airplanes has enhanced situational awareness for properly trained pilots. However, there is concern that this technology could lead to?
- complacency.
- resignation.
- fatigue.
Answer: complacency
If, while in level flight, it becomes necessary to use an alternate source of static pressure vented inside the airplane, which of the following should the pilot expect?
- The gyroscopic instruments to become inoperative.
- The altimeter and airspeed indicator to become inoperative.
- The vertical speed to momentarily show a climb.
Answer: the vertical speed to momentarily show a climb.
Explanation:
If the alternate static source is vented inside the airplane, where static pressure is usually lower than outside static pressure, selection of the alternate source may result in the following instrument indications: 1. The altimeter reads higher than normal; 2. Indicated airspeed greater than normal; and 3. The vertical-velocity indicator momentarily shows a climb.
(Refer to Figures 98 and 99.) To which aircraft position does HSI presentation ‘E’ correspond?
- 15
- 5
- 6
Answer: 6
Explanation:
HSI Indicator ‘E’ has a course selection of 360°, and the TO/FROM indicator is pointing to the tail of the course arrow. So the aircraft is flying away FROM the station, and is north of R-270 and R-090. The CDI bar is to the left, which means the aircraft is east of R-000. The aircraft heading is 360°, which describes aircraft 6. See the figure.
(Refer to Figures 96 and 97.) To which aircraft position(s) does HSI presentation ‘B’ correspond?
- 5 and 13.
- 11
- 7 and 11.
Answer: 5 and 13
When checking the sensitivity of a VOR receiver, the number of degrees in course change as the OBS is rotated to move the CDI from center to the last dot on either side should be between?
- 5° and 6°.
- 10° and 12°.
- 8° and 10°
Answer: 10 and 12
Explanation:
Course sensitivity may be checked by noting the number of degrees of change in the course selected as you rotate the OBS to move the CDI from center to the last dot on either side. This should be between 10° and 12°.
In which publication can the VOR receiver ground checkpoint(s) for a particular airport be found?
- Airport/Facility Directory.
- Aeronautical Information Manual.
- En Route Low Altitude Chart.
Answer: Airport/Facility Directory
Explanation:
A list of VOR receiver check points and VOR Test Facilities (VOT) can be found in the back of the Airport/Facility Directory.
What are the main differences between the SDF and the localizer of an ILS?
- The useable off-course indications are limited to 35° for the localizer and up to 90° for the SDF.
- The SDF course may not be aligned with the runway and the course may be wider.
- The course width for the localizer will always be 5° while the SDF course will be between 6° and 12°.
Answer: the SDF course may not be aligned with the runway and the course may be wider.
Explanation:
The SDF course may not be aligned with the runway and the course may be wider than an ILS localizer course. The ILS localizer course width varies between 3° and 6° and is tailored to provide 700 feet at the threshold (full-scale limits).
(Refer to Figure 111.) In which general direction from the VORTAC is the aircraft located?
- Southeast.
- Northeast.
- Northwest.
Answer: Northwest
Explanation:
The course selected is 360° and the TO/FROM indicator is pointing away from the course, which means the aircraft is north of the course. The CDI needle is deflected to the right, which means the aircraft is left (or west) of course. Therefore, the aircraft is northwest of the VORTAC. See the figure.
(Refer to Figures 96 and 97.) To which aircraft position does HSI presentation ‘I’ correspond?
- 4
- 11
- 12
Answer: 11
Explanation:
HSI Indicator ‘I’ is set up with the head of the arrow pointing to 090°. The aircraft is to the north of the extended centerline on a heading of 270°. The CDI is using reverse sensing, so position #7 or #11 would be appropriate. See the figure.
(Refer to Figures 96 and 97.) To which aircraft position does HSI presentation ‘H’ correspond?
- 1
- 2
- 8
Answer: 1
Explanation:
HSI Indicator ‘H’ is set up with the head of the arrow pointing to 270°. The CDI is deflected to the left, so the aircraft is to the north on a heading of 215°. Position #1 is the only position corresponding to the CDI presentation. See the figure.
Your avionics system offers advisory VNAV functions, but does not use WAAS or baro-VNAV systems. Which statement is true?
- You may use your avionics system to execute approaches to LNAV/VNAV minimums.
- Your avionics system cannot be used to execute approaches to LNAV/VNAV minimums.
- You may use your avionics system to execute approaches to LNAV/VNAV and LPV minimums.
Answer: Your avionics system cannot be used to execute approaches to LNAV/VNAV minimums.
(Refer to Figures 139 and 142.) Which displacement from the localizer and glide slope at the outer marker is indicated?
- 1,550 feet to the left of the localizer centerline and 210 feet below the glide slope.
- 775 feet to the left of the localizer centerline and 420 feet below the glide slope.
- 1,550 feet to the right of the localizer centerline and 210 feet above the glide slope.
Answer:
1,550 feet to the left of the localizer centerline and 210 feet below the glide slope.
Explanation:
With the CDI two dots to the right, we are to the left of course, and according to FAA Figure 139, at the 5.6 NM location 1,550 feet to the left of course. The glide slope indication is one dot below the glide slope and at the 5.6 NM mark, that would put you 210 feet below the glide slope.
What action should you take if your DME fails at FL240?
- Advise ATC of the failure and land at the nearest available airport where repairs can be made.
- Notify ATC that it will be necessary for you to go to a lower altitude, since your DME has failed.
- Notify ATC of the failure and continue to the next airport of intended landing where repairs can be made.
Answer: Notify ATC of the failure and continue to the next airport of intended landing where repairs can be made.
A flight is to be conducted in VFR-On-Top conditions at 12,500 feet MSL (above 1,200 feet AGL). What is the in-flight visibility and distance from clouds required for operation in Class E airspace during daylight hours?
- 3 miles; 1,000 feet above; 2,000 feet horizontal; 1,000 feet below.
- 5 miles; 1,000 feet above; 2,000 feet horizontal; 500 feet below.
- 5 miles; 1,000 feet above; 1 mile horizontal; 1,000 feet below.
5 miles; 1,000 feet above; 1 mile horizontal; 1,000 feet below.