AGK-04

What is used to help start a diesel engine in cold conditions?. Compression heating. Glow plugs. Induction heating. Spark plugs.

An aircraft flies at 31 000 ft, OAT = -50°C, RAS = 275 kt. The TAS will be: 446 kt. 275 kt. 434 kt. 456 kt.

A plug type passenger door on a pressurised aircraft. Cannot be opened in flight. Cannot be opened if the pressure inside the cabin is greater than outside. Can be opened at anytime in flight while the aircraft is pressurised. Will close itself when the aircraft is pressurised.

An aircraft flies at 25 000 ft, OAT = -38°C, RAS = 270 kt. The TAS will be: 396 kt. 184 kt. 389 kt. 405 kt.

A DGI in an aircraft is updated to the magnetic compass immediately before a turn is made. During the turn, the: DGI is more accurate than the magnetic compass. DGI and magnetic compass are equally accurate. DGI is the more accurate in the northern hemisphere but the magnetic compass is more accurate in the southern hemisphere. Magnetic compass is more accurate than the DGI.

Dynamic pressure is equal to: ½ (ρv)². ½ ρv². (1/2 ρv)². ½ vρ².

Deviation in a magnetic compass is caused by the: Foreign objects placed next to it. Difference in the location between true north and magnetic north. Presence of flaws in the permanent magnets of the compass. Magnetic fields within the aircraft distorting the lines of magnetic force.

Dynamic pressure is found in the ASI by: Adding static line pressure and pitot tube pressure. Subtracting static line pressure from pitot tube pressure. Subtracting pitot tube pressure from static line pressure. Subtracting total pressure from static line pressure.

Which of the following is not an advantage of a diesel engine compared to a petrol engine?. Fuel is less volatile and therefore has less risk of fire or explosion. Better power to weight ratio. Better fuel efficiency. Fuel is cheaper.

The method of construction utilizing a framework covered by a stressed skin sharing the load is known as: Semi-monocoque. Monocoque. Strut braced. Integral.

Why can't petrol be used in a diesel engine?. The lead content is unacceptable. Because it would detonate explosively instead of burning smoothly. It wouldn't provide the necessary lubrication for the fuel pump. Because diesel carburettors are particularly vulnerable to icing.

If an aircraft is equipped with a fixed-pitch propeller and a float-type carburetor, the first indication of carburetor ice would most likely be. a drop in oil temperature and cylinder head temperature. loss of RPM. engine roughness.

Real wander of a gyroscope may be caused by: Rotation of the earth. Mechanical imperfections. Movement over the earth’s surface. Too high a rotational speed of the gyro.

As air enters the restriction of a Venturi, velocity_____, static or ambient pressure_____ and temperature_____. decreases; increases; decreases. increases; decreases; decreases. decreases; decreases; increases. increases; increases; increases.

Engine compression ratio is the ratio of the: clearance volume to the swept volume. swept volume to the clearance volume. swept volume to the total volume. total volume to the clearance volume.

During flight you suspect that the static line may be blocked and elect to use the alternate static source. When compared to the main static source, alternate static pressure is: The same. Lower. Either higher or lower depending on the ambient pressure. Higher.

As an aircraft with a variable-pitch, constant-speed propeller accelerates along the runway: the blade pitch angle increases, maintaining a constant angle of attack and RPM. the angle of attack will remain constant and the engine RPM will increase. the angle of attack will decrease and the engine RPM remain constant. the linear velocity of the propeller tip will gradually decrease.

A precaution for the operation of an engine equipped with a constant-speed propeller is to: always use a rich mixture with high RPM settings. avoid high manifold pressure settings with low RPM. avoid high RPM settings with high manifold pressure.

In a four stroke piston engine a normal “Otto” cycle each valve will open: Twice. Once. Four times. Three times.

How longitudinal (fore and aft) structural members of a semi-monocoque fuselage are called?. Spars and ribs. Longerons and stringers. Ribs and stringers.

Connecting two 12 volt, 40 ampere-hour, capacity batteries in series will provide a battery of: 12 volts and 80 ampere-hours capacity. 24 volts and 40 ampere-hours capacity. 24 volts and 80 ampere-hours capacity. 12 volts and 40 ampere hours capacity.

A double pole electrical system;. has the return current flowing back through the metal of the airframe to complete the circuit. is fail-safe, and so does not require a battery. requires one cable taking the current to the component and another to complete the circuit back to the negative side of the generator or alternator. is not required in aircraft which are made of non-conductive materials.

Detonation is: Cannot be identified externally. Also known as “piston slap”. Part of normal engine running. Harmful to the pistons.

During flight, the DGI has to be resynchronized to the magnetic compass every 10 to 15 minutes to correct: Real drift, earth rotation, latitude nut correction, longitude drift. Real drift, earth rotation, longitude drift. Earth rotation, real drift, transport wander. Real drift, earth rotation, latitude drift.

If there are metallic objects close to an aircraft's magnetic compass: They should have no effect on compass indications. They will have a significant effect on magnetic variation. The Direction Indicator will not be able to be synchronized with the compass. They will cause errors in the indications of the compass.