Atmospheric Pressure - Jamb Physics Past Questions and Answers

Question 11:

• JAMB 1986

Mercury is suitable as a barometric fluid because it

A. Expands uniformly
B. Is opaque
C. Is several times denser than water
D. Is a good conductor of heat

Question 12:

• JAMB 1987

The distance between the fixed points of a centigrade thermometer is 20cm. What is the temperature when the mercury level is 4.5cm above the lower mark?

A. 22.5^oC
B. 29.0^oC
C. 90.0^oC
D. 100.0^oC

Question 13:

• JAMB 1987

As a result of air at the top of a barometer, the height of the mercury column is 73.5cm when it should be 75.0cm; the volume of the space above the mercury is 8.0cm³. Calculate the correct barometer height when the barometer reads 74.0cm and the volume of the space above the mercury is 6.0cm³.

A. 72.0cm
B. 74.5cm
C. 75.1cm
D. 76.0cm

Question 14:

• JAMB 1988

When one arm of a U-tube manometer is connected to a gas supply, the levels of mercury in the two arms of the U-tube is shown in the figure above, if the atmospheric pressure is 76.0cm hg, the gas pressure is

A. 62.6cm hg
B. 72.5cm hg
C. 79.5cm hg
D. 85.9cm hg

Question 15:

• JAMB 1989

Which of the following devices are used to measure pressure? i. Aneroid barometer. ii. hydrometer. iii. hygrometer. iv. manometer.

A. I and iii
B. Ii and iii
C. Iii and iv
D. I and iv