[ARC5] FCC General exam

[Francesco Ledda]

It does have applicability! Carb heat has a clear impact on RPM and engine
output power.  Max engine efficiency is at EGT peak.

This is fully covered on all pilot training material; it is fundamental to
deal with possible carb ice.

Frank
KF5RXV

-----Original Message-----
From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net] On
Behalf Of Robert Eleazer
Sent: Tuesday, November 26, 2013 2:24 PM
To: arc5 at mailman.qth.net
Subject: Re: [ARC5] FCC General exam

I have a real problem with pointless questions on Govt exams.

For example on a Private Pilot written exam, they asked : "What effect does
carburetor heat have on the engine fuel-air mixture?"

As an engineer, I knew that heating the intake air enriches the engine
mixture ratio because the air is thus less dense.  But I never saw that
taught in any ground course and the fact seemed to have no applicability to
light aircraft operations.  In other words, I figured most people would not
know what I know, and answered 'No effect."  The correct answer was indeed
that it enriches the air fuel mixture.

Trivia questions have no place on license exams!  That "highest layer"
question seems to fit that concept to me. 

Wayne
   
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