Refer to figure.

1. The rate of climb at 6000 ft with 2050 lb is 800 fpm: INCORRECT.

• Enter with the Pressure altitude 6000 ft from the left and move horizontally to the right to intersect the Gross mass 2050 lb.
• Continue vertically down and read the Rate of Climb: 580 ft/min.

2. The rate of climb at 7500 ft with 1800 lb is 600 fpm: INCORRECT.

• Enter with the Pressure altitude 7500 ft from the left and move horizontally to the right to intersect the Gross mass 1800 lb.
• Continue vertically down and read the Rate of Climb: 780 ft/min.

3. The rate of climb is constant up to 4200 ft: CORRECT.

• The rate of climb is a vertical line, thus constant, for each mass up to 4200 ft.

4. The rate of climb is the same for all masses up to 2000 ft: INCORRECT.

• The rate of climb is a vertical line, thus constant, for each mass to 4200 ft and not the same for all masses.