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Civil Quiz 49
The friction experienced by a body, when in motion, is known as
dynamic friction
rolling friction
limiting friction
static friction
The bull headed rails are provided on points and crossings.
Both A and B
No
None of the above
Yes
Which of the following is type of cofferdam?
Rock-filled crib cofferdam
Cellular cofferdam
Suspended cofferdam
All of the above
In which type of water demand, minimum average consumption of water takes place?
domestic water demand
fire demand
institutional and commercial water demand
industrial water demand
The discharge of regulated chemicals into surface waters is controlled by
pdac
cercla
npdes
sara
If D is distance between centres of two parallel track of gauge G, then, total length of cross-over (from the point of commencement to the point of termination) with an intermediate straight portion and N crossing, is given by
DN + G [2N + N2)]
DN + G [N + N2)]
DN + G [3N + N2)]
DN + G [4N + N2)]
Where is the turbine not used?
Solar power
Windmill
Water wheels
Gas plant
For preparing porcelains, the clay should be
Of good plasticity
Of high degree of tenacity
All the above
Sufficiently pure
In flemish bond_____..
all course are header course
alternate brick of stretcher and header formation is same course
alternate course of the stretcher and headers
all course are stretcher course
Quick lime is (i) Slow in setting (ii) Rapid in slacking (iii) Good in strength The correct answer is
Both (i) and (ii)
Both (ii) and (iii)
Only (i)
Only (ii)
Varingon's theorem of moments states that if a number of coplaner forces acting on a particle are in equilibrium, then
their algebraic sum is zero
the algebraic sum of their moments about any point in their plane is zero
the algebraic sum of their moments about any point is equal to the moment of their resultant force about the same point
their lines of action are at equal distances
In the mid-section formula
the area of mid-sections is calculated by using mean depth
all of the above
the volume of the earth work is calculated by multiplying the mid-section area by the distance between the two original sections
the mean depth is the average of depths of two consecutive sections
Voids that implode near metal surface develops a
Drag force
Shock waves
Flow speed View Answer
Cyclic stress
The thickness t of a single flat lacing should not be less than
1/40th length between inner end rivets
1/60th length between inner end rivets
1/50th length between inner end rivets
1/30th length between inner end rivets
The overall length of a turn out is the distance between the end of stock rail and
Toe of crossing
Throat of crossing
Actual nose of crossing
Heel of crossing
If a number of forces are acting at a point, their resultant will be inclined at an angle ? with the horizontal, such that
tan ? = ?V x ?H
tan ? = ?H / ?V
tan ? = ?V / ?H
None of the above
The piles which do not support the load by themselves, but act as a medium to transmit the load from the foundation to the resisting sub-stratum, are known as
batter piles
friction piles
compaction piles
bearing piles
For sea water concreting _______ . cement shall be used.
Portland pozzolana slag cement
Super sulphated cement
Portland slag cement
All of above
Discharge in inward flow reaction turbine
Gradually decreases
Increases
Remains constant
Decreases
Euler number is important in which of the following flow situations?
Pressure rise due to sudden closure of valves
Flow through pipes
All of the above
Discharge through orifices, mouthpieces and sluices
A runoff river plant is
a high head scheme
a low head scheme
none of the above
a medium head scheme
Which of the following factors determine the friction factor for turbulent flow in a rough pipe?
Froude's number and relative roughness.
Froude's number and Mach's number
Reynolds number and relative roughness
Mach number and relative roughness
Construction team means
All the above
An owner
An engineer
An architect
The pipe joint commonly used in pumping stations is
flanged joint
expansion joint
flexible joint
spigot and socket joint
A pre-stressed concrete member is preferred because
Removal of cracks in the members due toshrinkage
Its dimensions are not decided from the diagonal tensile stress
Large size of long beams carrying large shear force need not be adopted
All the above
Which of the following excavators is most suitable for digging under water?
Clam shell
Drag line
Hoe
Dipper shovel
In level crossing, the water level of canal is much higher than that of the drainage.
TRUE
FALSE
Both A and B
None of the above
The method of levelling in which the heights of mountains are found by observing the temperature at which water boils is known as
barometric levelling
longitudinal levelling
reciprocal levelling
hypometry
The ratio of static friction to dynamic friction is always
equal to one
greater than one
none of these
less than one
Bio-chemical oxygen demand (B.O.D.) of safe drinking water must be
10
0
50
100