what is the unit weight of PCC
Anonymous Quiz
65%
2400 kg per metre cube
22%
2500 kg per metre cube
8%
3000 kg per metre cube
6%
none of the above
Forwarded from UNACADEMY STUDY GROUP GATE 2023 < MOHAN >
the action of negative skin friction on pile is to
Anonymous Quiz
31%
increase the ultimate load on the pile
34%
reduce the allowable load on the pile
14%
maintain the working load on the pile
22%
reduce the settlement of the pile
Properties of Ordinary hydraulic cement
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Forwarded from UNACADEMY STUDY GROUP GATE 2023 < MOHAN >
the action of negative skin friction on pile is to
Anonymous Quiz
31%
increase the ultimate load on the pile
34%
reduce the allowable load on the pile
14%
maintain the working load on the pile
22%
reduce the settlement of the pile
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Forwarded from UNACADEMY STUDY GROUP GATE 2023 < MOHAN >
Hardness of water is measured in terms of
Anonymous Quiz
65%
Calcium carbonate
13%
sodium
8%
magnesium
13%
none of the above
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Forwarded from GATE CIVIL 2023( GATE civil engineering )
Theodolite is an instrument used for_________________?
Anonymous Quiz
4%
A. tightening the capstan-headed nuts of level tube
11%
B. measurement of horizontal angles only
7%
C. measurement of vertical angles only
78%
D. measurement of both horizontal and vertical angles
Forwarded from UNACADEMY STUDY GROUP GATE 2023 < MOHAN >
Dumpy level is most suitable when______________?
Anonymous Poll
26%
A. the instrument is to be shifted frequently
19%
B. fly levelling is being done over long distance
29%
C. many readings are to be taken from a single setting of the instrument
57%
all
in torsion balance method for the determination of water content which type of radiation is used for drying soil
Anonymous Quiz
42%
infrared radiation
24%
violet radiation
28%
both
6%
none
For coarse grain soil which type of analysis is used ?
Anonymous Quiz
66%
sieve analysis
6%
pippete analysis
8%
hydrometer analysis
20%
all of the above
in fine sieving sample is washed with....
Anonymous Quiz
42%
sodium hexametaphosphate in in 1 litre of water
13%
potassium dichromate
8%
aluminium hydroxide
37%
water
Forwarded from UNACADEMY STUDY GROUP GATE 2023 < MOHAN >
For less plastic soil which apparatus is used
Anonymous Quiz
34%
ASTM
39%
Casa Grande apparatus
23%
both
4%
none
Forwarded from UNACADEMY STUDY GROUP GATE 2023 < MOHAN >
particle size less than .2 micron can be analysed by the following...
Anonymous Quiz
49%
sedimentation analysis
26%
x ray diffraction method
20%
both of these
5%
none of the above
Forwarded from UNACADEMY STUDY GROUP GATE 2023 < MOHAN >
For less plastic soil which apparatus is used
Anonymous Quiz
34%
ASTM
39%
Casa Grande apparatus
23%
both
4%
none
Forwarded from UNACADEMY STUDY GROUP GATE 2023 < MOHAN >
the range of void ratio between which quick sand condition occur in cohesion less granular soil deposit is....
Anonymous Quiz
42%
0.4 - 0.5
41%
0.6 - 0.7
12%
0.8 - 0.9
5%
none
◼️Physical characteristics of drinking water
🔻 Temperature (10 ℃ to 20 ℃)
👉 Temperature should not be less than 10 ℃.
👉 Higher the temperature lower will be solubility.
🔻 Colour (5 ppm - 10 ppm)
👉 It is measured by Tintometer
👉 It is measured on Platinum Cobalt Scale
🔻 Turbidity (5 ppm - 10 ppm)
Turbidity is the measure of resistance to the passage of light through water
👉 It is measured on Silica scale
👉 It is measured by turbidity meter.
♦️ Taste and Odour (< 3TON)
👉 Odour is expressed in terms of TON (Threshold odour Number)
👉 Odour is measured by an apparatus called Osmoscope
👉 It is tested normally at 20℃ to 25℃
🔻 Specific Conductivity
👉 To know dissolved salt content. Determined by Dionic water tester.
🔻 Temperature (10 ℃ to 20 ℃)
👉 Temperature should not be less than 10 ℃.
👉 Higher the temperature lower will be solubility.
🔻 Colour (5 ppm - 10 ppm)
👉 It is measured by Tintometer
👉 It is measured on Platinum Cobalt Scale
🔻 Turbidity (5 ppm - 10 ppm)
Turbidity is the measure of resistance to the passage of light through water
👉 It is measured on Silica scale
👉 It is measured by turbidity meter.
♦️ Taste and Odour (< 3TON)
👉 Odour is expressed in terms of TON (Threshold odour Number)
👉 Odour is measured by an apparatus called Osmoscope
👉 It is tested normally at 20℃ to 25℃
🔻 Specific Conductivity
👉 To know dissolved salt content. Determined by Dionic water tester.
🔳Chemical Characteristics of drinking water
🔻 Total Dissolved solids (<500)
👉 Total solids can be found by evaporating a sample of water and weighing the dry residue left.
👉 Suspended solids can be found by filtering water sample through Whatman filter paper No.44
🔻 pH (6.5 to 8.5)
👉 It is measure hydrogen ion concentration in water.
👉 It is measure by Potentiometer and Colorimetric method
▪️ Alkalinity - It is caused by bicarbonates of Ca & Mg and carbonates, hydroxides of Ca, Mg, Na, K.
▪️ Acidity - It is caused by Mineral Acids, Free Co2, Sulphates of Fe & Aluminium.
▪️ Alkalinity effect - Incrustation and sediment deposit in pipelines and difficult in chlorination.
▪️ Acidity effects - Tuberculation & Corrosion of pipe lines.
👉 Alkalinity and Acidity is estimated by Titrometry.
👉 Total Alkalinity < 200 mg/l as CaCo3
🔻 Hardness (<200 ppm)
👉 It is measured by EDTA test( Versante method)
👉 Temporary hardness caused by Bicarbonates and carbonates of Ca & Mg
👉 Permanent hardness caused by sulphate, chloride and nitrate of ca & Mg.
💢 1 French degree hardness = 10 ppm
💢 1 British degree hardness = 14.25 ppm
💢 1 American degree hardness = 17.15 ppm
🔻 Total Dissolved solids (<500)
👉 Total solids can be found by evaporating a sample of water and weighing the dry residue left.
👉 Suspended solids can be found by filtering water sample through Whatman filter paper No.44
🔻 pH (6.5 to 8.5)
👉 It is measure hydrogen ion concentration in water.
👉 It is measure by Potentiometer and Colorimetric method
▪️ Alkalinity - It is caused by bicarbonates of Ca & Mg and carbonates, hydroxides of Ca, Mg, Na, K.
▪️ Acidity - It is caused by Mineral Acids, Free Co2, Sulphates of Fe & Aluminium.
▪️ Alkalinity effect - Incrustation and sediment deposit in pipelines and difficult in chlorination.
▪️ Acidity effects - Tuberculation & Corrosion of pipe lines.
👉 Alkalinity and Acidity is estimated by Titrometry.
👉 Total Alkalinity < 200 mg/l as CaCo3
🔻 Hardness (<200 ppm)
👉 It is measured by EDTA test( Versante method)
👉 Temporary hardness caused by Bicarbonates and carbonates of Ca & Mg
👉 Permanent hardness caused by sulphate, chloride and nitrate of ca & Mg.
💢 1 French degree hardness = 10 ppm
💢 1 British degree hardness = 14.25 ppm
💢 1 American degree hardness = 17.15 ppm