LRC is flown as a mach no but as I said it is a point on the drag curve and

Lrc is flown as a mach no but as i said it is a point

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LRC is flown as a mach no but as I said it is a point on the drag curve and using our ERTM graph EAS would be the constant so LRC as a mach no. decreases with decreasing altitude. Question 253: Under which condition should you fly considerably lower (4 000 ft or more) than the optimum altitude ?
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A If at the lower altitude either considerably less headwind or considerably more tailwind can be expected. B If at the lower altitude there is a greater headwind. C If at the lower altitude there is less tailwind. D If the maximum altitude is below the optimum altitude. Explanation: Cruise altitude is usually at the optimum altitude, to reduce fuel consumption but if there's a favourable wind (either reducing headwind which is slowing you down, or increasing tailwind which will increase your speed) you may prefer to fly at different altitude. Question 254: If, after experiencing an engine failure when cruising above the one- engine-inoperative ceiling, an aeroplane is unable to maintain its cruising altitude, the procedure that should be adopted is: A Drift Down Procedure. B ETOPS. C Long Range Cruise Descent. D Emergency Descent Procedure. Explanation: NO Question 255: 'Drift down' is the procedure to be applied A after engine failure if the aeroplane is above the one engine out maximum altitude. B to conduct a visual approach with one engine out. C after cabin depressurization. D to conduct an instrument approach at the alternate. Explanation: NO Question 256: If the level-off altitude is below the obstacle clearance altitude during a drift down procedure A fuel jettisoning should be started at the beginning of drift down. B the recommended drift down speed should be disregarded and it should be flown at the stall speed plus 10 kt. C fuel jettisoning should be started when the obstacle clearance altitude is reached. D the drift down should be flown with flaps in the approach configuration. Explanation: The question states: „If the leve l-off altitude is below the obstacle clearance altitude during a drift down procedure‟ Therefore, because at the original mass obstacle clearance at the end of driftdown cannot be maintained when stabilised then the mass must be
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reduced by jettisoning fuel at the start of the driftdown commensurate with retaining sufficient reserves to make the alternate airfield. Question 257: Which statement is correct for a descent without engine thrust at maximum lift to drag ratio speed? A The higher the gross mass the greater is the speed for descent. B The mass of an aeroplane does not have any effect on the speed for descent. C The higher the gross mass the lower is the speed for descent. D The higher the average temperature (OAT) the lower is the speed for descent. Explanation: NO Question 258: The maximum mass for landing could be limited by A the climb requirements with one engine inoperative in the approach configuration.
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