Following are true about COPD, except
Reduced FEV1
Increased Residual Volume
Decreased Diffusion capacity (DLco)
Decreased Maximal Expiratory Flow Rate (MEFR)
COPD is an obstructive lung disease. Obstructive diseases have reduced FEV1, FVC and reduced FEV1/FVC. Flow rates like MEFR (Maximal Expiratory Flow Rate ) are also reduced. 
Due to air-trapping, the residual volume is increased. 
Reduction in DLco is seen interstitial lung diseases or pneumonias, not in COPD . 
DLco may be reduced in Emphysema due to alveolar damage.