Related Questions

Mr. Ali decided to walk down the escalator of a tube station. He found that if he walks down 26 steps, he requires 30 seconds to reach the bottom. However, if he steps down 34 stairs he would only require 18 seconds to get to the bottom. If the time is measured from the moment the top step begins to descend to the time he steps off the last step at the bottom, find out the height of the stair way in steps?
A 23 steps
B 16 steps
C 46 steps
D 26 steps
For a particle settling in water at its terminal settling velocity, which of the following is true?
A Buoyancy = weight + drag
B Weight = buoyancy + drag
C Drag = buoyancy + weight
D Drag = weight
Drag co-efficient in hindered settling is __________ that in free settling.
A Less than
B Equal to
C Not necessarily greater than
D Always greater than
For motion of spherical particles in a stationary fluid, the drag co-efficient in hindered settling compared to that in free settling is
A More
B Less
C Equal
D More or less, depending on the type of particle
If the flame of a miner's safety lamp in the upper layers of the sewer forms an explosive, the sewer certainly contains
A Hydrogen sulphide
B Carbon dioxide
C Methane
D Oxygen
Most suitable section of sewer in separate sewage system is
A Rectangular section
B Circular section
C Standard form of egg shaped sewer
D Modified egg shaped section
A pipe conveying sewage from plumbing system of a single building to common sewer or point of immediate disposal is called
A House sewer
B Lateral sewer
C Main sewer
D Sub-main sewer
The sewer which transports the sewage to the point of treatment, is called
A House sewer
B Out-fall sewer
C Branch sewer
D Main sewer
The sewer pipe which carries sewage from a building for immediate disposal is
A House sewer
B Lateral sewer
C Intercepting sewer
D Main sewer
The sewer that unloads the sewage at the point of treatment is called
A Main sewer
B Outfall sewer
C Branch sewer
D House sewer

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