*** the answer is underlined

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1.       After heavy landing,

a.       Sagging

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2.       Oil Canning  inwared is

a.       Between rivet line

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3.       Bolt,rivet and skin take

a.       Shear load

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4.       Double Pole Double Throw (DPDT) switch is a switch that has

a.       2 input , 4 output

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5.       Antiskid, normal brake and autobrake system is

a.       Independent system