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Browse complete papersHydrostatic pressure in a fluid at a given depth is directly proportional to:
Fluid density
Fluid velocity
Fluid temperature
Viscosity
Correct answer
Fluid density
In which of the following cases does the flow in a pipe become fully developed?
When the velocity profile is fully formed and the flow is steady
When the pipe diameter increases significantly
When the Reynolds number is less than \(2000\)
When the flow is unsteady
Correct answer
When the velocity profile is fully formed and the flow is steady
Which of the following is true regarding laminar flow in a pipe?
The velocity profile is parabolic
The flow is characterized by large swirling eddies
The Reynolds number is greater than \(4000\)
The friction factor is constant and independent of Reynolds number
Correct answer
The velocity profile is parabolic
In open channel flow, which geometric condition must be met for a channel to be considered hydraulically most efficient (i.e., to carry the maximum discharge for a given cross-sectional area and slope)?
The hydraulic radius is maximized.
The Froude number is equal to 1.
The specific energy is minimized.
The velocity of flow is equal to the critical velocity.
Correct answer
The hydraulic radius is maximized.
The Froude number in open channel flow is used to determine which of the following characteristics of the flow?
The relationship between gravitational forces and inertial forces, which helps classify the flow as subcritical, supercritical, or critical, with respect to the flow depth and velocity
The variation of the velocity profile across the flow section, by analyzing the depth-averaged velocity and hydraulic radius
The discharge capacity of the channel, accounting for channel shape, roughness, and slope, in addition to Froude number
The intensity of turbulence and the onset of flow separation, particularly in channels with varying roughness and steep gradients
Correct answer
The relationship between gravitational forces and inertial forces, which helps classify the flow as subcritical, supercritical, or critical, with respect to the flow depth and velocity
At a point on a streamline, the velocity of the fluid is \(5 \text{ m/s}\), and the radius of curvature is \(2 \text{ m}\). If the rate of change of velocity along the streamline is \(2 \text{ m/s}^2\), what is the total acceleration at this point?
\(6 \text{ m/s}^2\)
\(15.56 \text{ m/s}^2\)
\(12.65 \text{ m/s}^2\)
\(10 \text{ m/s}^2\)
Correct answer
\(6 \text{ m/s}^2\)
Which of the following is not included in detailed estimates?
Material cost
Labour cost
Future market trends
Contingencies
Correct answer
Material cost
Rate analysis involves calculation of:
Only materials
Only labour
Materials, labour, and overheads
Only equipment
Correct answer
Only materials
A rectangular building plan has external dimensions of \(10 \text{ m} \times 8 \text{ m}\). If all the walls are \(0.3 \text{ m}\) thick, what is the total length of the walls using the Centreline Method?
\(36.4 \text{ m}\)
\(36.0 \text{ m}\)
\(35.4 \text{ m}\)
\(34.8 \text{ m}\)
Correct answer
\(36.4 \text{ m}\)
Carpet area is also known as:
Net usable area
Built-up area
Super built-up area
Gross floor area
Correct answer
Net usable area