Civil Engineering MCQs

2965 MCQs  (Page 252 of 297)

Pressure of the order of 10″‘ torr can be measured by_______________ ?
A. Bourdon tube
B. Pirani gauge
C. Micro-manometer
D. Ionisastion gauge
In an isothermal atmosphere, the pressure__________________?
A. Decreases linearly with elevation
B. Remains constant
C. Varies in the same way as the density
D. Increases exponentially with elevation
Barometer is used to measure__________________?
A. Pressure in pipes, channels etc.
B. Atmospheric pressure
C. Very low pressure
D. Difference of pressure between two points
The vapour pressure over the concave surface is________________?
A. Less MAN the vapour pressure over the plane surface
B. Equal to the vapour pressure over the plane surface
C. Greater than the vapour pressure over the plane surface
D. Zero
To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than_______________?
A. 2.4 m above the hydraulic gradient
B. 6.4 m above the hydraulic gradient
C. 10.0 m above the hydraulic gradient
D. 5.0 above the hydraulic gradient
Surface energy per unit area of a surface is numerically equal to___________________?
A. Atmospheric pressure
B. Surface tension
C. Force of adhesion
D. Force of cohesion