Engineering Questions with Answers - Multiple Choice Questions
MCQs on Definition of Column
Column is a tension member.
Explanation: Compression members are the structural elements that are pushed together or carrying a load; more technically they are subjected to axial compressive forces. Example: Column, strut etc.
__________ is a vertical member subjected to direct compressive force.
Explanation: A vertical member subjected to direct compressive forces is called a column or pillar. The column transfers the load from the beams or slab to the footings and foundations.
The inclined member carrying compressive loads is __________
Explanation: The inclined member carrying compressive load in case of frames and trusses is called as a strut. A strut is a member of a structure in any position carrying an axial load. Strut may be horizontal, inclined or even vertical.
A built up rolled steel section carrying compressive force is called ___________
Explanation: A built up rolled Steel section carrying compressive force is known as “stanchion”. A wood member carrying compressive force is called a “post”.
The process of removing chlorine from water is known as ____________
a) De chlorination
b) Re chlorination
c) Post chlorination
d) Pre chlorination
Explanation: De chlorination means removing the chlorine from the water this is generally required when super chlorination has been practiced.
The organic impurities in the water from a layer on the top of a filtering media are called _______
a) Filter layer
b) Permeable layer
c) Impermeable layer
d) Dirty skin
Explanation: The water from the sedimentation tank is allowed to enter over a bed of sand through the inlet chamber. The water percolates through sand bed during the dry skin is formed. The organic and bacterial impurities are removed by this layer.
The rate of filtration in slow sand filter is ___________
a) 100 to 150 lit/hr/m2
b) 150 to 200 lit/hr/m2
c) 250 to 350 lit/hr/m2
d) 100 to 200 lit/hr/m2
Explanation: The slow sand filter is effective in bacterial removal and it is preferable for uniform quality of treated water. It is simple to construct and supervise. The rate of filtration is small and ranges from 100 to 200 lit/hr/m2.
The sand used for filtration should not lose weight more than ________ when placed in Hcl for 24 hours.
a) 5 %
b) 10 %
c) 15 %
d) 20 %
Explanation: According to the board of Indian Standards [BIS], the sand which is used for filtration process should not lose weight more than 5% when placed in hydrochloric acid for one day (24 hours).
Cleaning period of slow sand filter is taken as __________
a) 1 to 3 weeks
b) 1 to 3 days
c) 1 to 3 months
d) 1 to 2 hours
Explanation: For the purpose of cleaning the top layer of sand is removed to a depth of 15 mm to 25 mm. The water is admitted to the filter the cleaning interval varies from 1 to 3 months.
The efficiency of slow sand filter is about ___________
a) 99 %
b) 95 %
c) 85 %
d) 90 %
Explanation: The slow sand filters remove suspended and bacterial impurities to an extent of 98 to 99%. It requires a large area and unsuitable for treating high turbid water.
What is the uniformity coefficient of sand used in the rapid sand filter?
Explanation: The effective size of sand used in rapid sand filter is 1.5 mm and the uniformity Coefficient varies from 1.25 to 1.35.
The dosage of ozone is about ________ ppm residual ozone.
a) 2 to 3 ppm
b) 2 to 4 ppm
c) 1 to 5 ppm
Explanation: Ozone easily breaks down with oxygen and releases nascent oxygen which is powerful in killing bacteria. It also reduces organic matter present in the water the dosage of ozone is about 2 to 3 ppm.
Which of the following process is also known as Ion exchange process?
a) Lime soda process
b) Base exchange process
c) Demineralization process
d) Cation exchange process
Explanation: Softening of water can be done by the demineralization process which is also known as deionized water. In, each method minerals are removed my pass in the water through a bed of cation exchange resin.
Aeration is effective in removing of _________ odours.
a) 60 %
b) 75 %
c) 30 %
Explanation: Aeration is effective in removing 75% of odours. This process also removes carbon dioxide to a great extent. Aeration is affected by filtering it through perforated trays through different methods.
Which of the following is a control measure of removal of colour, taste and order?
a) Ozone treatment
b) Silver treatment
c) Copper sulphate treatment
d) Use of chloramines
Explanation: Copper sulphate also helps in the removal of colour taste and odour it prevents the growth of algae and also acts as disinfectant. It is used for swimming pool water to give play then colour.