Engineering Questions with Answers - Multiple Choice Questions
MCQs on Thin Cylinder with Maximum Shear Stress
Torsional modulus is ___________ to torsional strength.
a) Inversely proportional
b) Directly proportional
Explanation: As the value of torsional modulus increases, the torsional strength increases. For example, a hollow circular shaft compared to that of solid shaft of the same area will have more torsional strength.
_______ torque produces the maximum shear stress due to combined bending.
Explanation: The equipment torque is the twisting moment which acts along to produce the maximum shear stress due to combined bending and torsion.
_______ is the structures installed for the purpose of drawing water.
Explanation: The devices or structures installed for the purpose of drawing water from the sources are called intakes. Water is distributed from the source to the treatment through conduits.
_______ is an example of a gravity conduit.
a) C I pipes
c) W I pipes
d) Steel pipes
Explanation: Gravity conduits are those in which water flows under more action of gravity. Flumes are open channels supported on (over the ground surfaces).
________ is the gravity conduits used while crossing a hill or lock.
Explanation: Tunnels are portions of aqueduct used while crossing a hill or rock. They may be grade tunnels or pressure tunnels depending on whether the water flows with a free surface or under pressure.
In aqueduct, the nominal flow of velocity be ________
a) 0.5 m/s
b) 0.9 m/s
c) 0.6 m/s
d) 0.8 m/s
Explanation: Aqueduct is covered waterways used to carry water from a remote source to origin of distribution. Water is not under pressure, so the aqueduct can even be built of brick with a velocity of 0.9 metre per second.
_____________ coincides with the water surface in a canal or open channel.
Explanation: The hydraulic gradient line in channels coincides with the water surface in a canal or open channel. The generally canals are trapezoidal in shape but rectangular sections prove economical.
Pressure conduits are also known as _______
a) Pipe conduits
b) Gravity conduits
c) Artesian conduits
d) Surface conduits
Explanation: Pressure conduits are also known as pipe conduits in which large amounts of water flow under pressure. The location is so chosen that it will be most favourable with regard to the construction cost and resulting pressures.
What is the flow of velocity in the pressure conduit?
a) 0.5 to 0.6 m/s
b) 0.6 to 0.7 m/s
c) 0.6 to 0.8 m/s
d) 0.8 to 1 m/s
Explanation: Velocities should be high enough to prevent silt deposition in the pipe and should be about 0.6 to 0.8 m/s. At low points, in the pipes, blow off branches with valves are placed to drain the water.
Pressure conduits with steel pipes varies diameter _______
a) 2500 mm
b) 3000 mm
c) 3500 mm
d) 4000 mm
Explanation: Steel pipes are manufactured for various purposes like rising mains, conveying mains distribution systems and inverted siphons. They are used in size ranging from 900 mm to 3000 mm in diameter.
Which of the following conduits possess low resistance to acid nature?
a) RCC pipes
b) PVC pipes
c) Steel pipes
d) PSC pipes
Explanation: A partial vacuum is formed while emptying the steel pipeline, it is likely to collapse easily or get deform permanently. Steel pipes are more liable to resist acidic nature.
_______ pipes are not easily biodegradable.
d) G I
Explanation: Reinforced concrete pipes maybe precast or cast in situ. The life of pipes is more than 65 years. They are not easily biodegradable. They can be manufactured with indigenous equipment.
RCC pipes can be used up to a pressure of 3.0 kg/cm2.
Explanation: RCC pipes can be used up to a pressure of 3 kg/cm2. Cast Iron pipes and steel pipes up to 24 kg/cm2.
a) High Density Polyvinyl Pipe
b) High Density Polyethylene Pipe
c) High Deformed Polyvinyl Pipe
d) High Deformed Polyethene Pipe
Explanation: HDPE stands for High Density Polyethylene Pipe. HDPE pipes of sizes ranging from 300 to 3000 mm internal diameter are manufactured by a helical winding process.
_______ conduits are 1/10 weight of concrete.
Explanation: Fibre glass reinforced plastic pipes are manufactured using glass fibre, polyester resin and fillers to form a homogeneous structure. They are light in weight (1/5 of the steel and 1/10 of concrete).