NBRC Pulmonary Function Testing

Question 1

Spirometry is primarily used to detect and quantify:

Accepted Answer

Obstructive and restrictive ventilatory defects

Answer

Gas transfer abnormalities

Answer

Pulmonary vascular resistance

Answer

Lung perfusion abnormalities

Question 2

An FEV1/FVC ratio below 70% (or below the lower limit of normal) indicates:

Accepted Answer

Obstructive lung disease

Answer

Restrictive lung disease

Answer

Normal lung function

Answer

Diffusion impairment

Question 3

In restrictive lung disease, spirometry typically shows:

Accepted Answer

Proportionally reduced FEV1 and FVC with a normal or elevated FEV1/FVC ratio

Answer

Reduced FEV1/FVC ratio with preserved FVC

Answer

Increased total lung capacity

Answer

Elevated residual volume

Question 4

The DLCO (diffusing capacity for carbon monoxide) is reduced in which condition?

Accepted Answer

Emphysema

Answer

Asthma

Answer

Obesity

Answer

Neuromuscular weakness

Question 5

Body plethysmography is used to measure which lung volume that spirometry cannot directly assess?

Accepted Answer

Residual volume

Answer

Tidal volume

Answer

Inspiratory reserve volume

Answer

Expiratory reserve volume

Question 6

Post-bronchodilator testing showing ≥12% and ≥200 mL improvement in FEV1 indicates:

Accepted Answer

Significant bronchodilator reversibility (consistent with asthma)

Answer

Fixed airflow obstruction

Answer

Restrictive physiology

Answer

Normal baseline spirometry