Geotechnical Engineering

Determination of Liquid and Plastic Limit

Question 1
Marks : +2 | -2
Pass Ratio : 100%
The depth of the groove cut by casagrande tool for determining the liquid limit is ______
10 mm
11.0 mm
2 mm
8 mm
Explanation:
The casagrande tools cut a groove of size 11.0 mm wide at the bottom.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
The grooving tool which is used for finding liquid limit is _________
ASTM tools
Grooving tools
All of the mentioned
None of the mentioned
Explanation:
ASTM tool and casagrande tools are two types of grooving tools are used in determining liquid and plastic limit.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
The type of tools which is preferred for sandy soil for the purpose of grooving is _______
ASTM tool
Casagrande tool
All of the mentioned
None of the mentioned
Explanation:
ASTM tool is used only for more sandy soil, where the Casagrande tool tends to tears the side of the groove.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
The plastic index is calculated from the relation ____________
IP = WP-WL
IP = WL-WP
IP= IL-IS
IP=IW-IS
Explanation:
The plasticity index is given by the formula, IP=WL-WP.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
The cone which is used to penetrate the soil pat has a central angle of ___________
26 degree
30 degree
31 degree
40 degree
Explanation:
The cone has a central angle of 31° since the total sliding mass is 80 g.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
The toughness index (It) is defined by the ratio of __________
It=WP/IP
It=IP/If
It=IF/IP
It=WL/If
Explanation:
Toughness index (It) is determined by the ratio of plasticity index to the flow index: It=IP/If.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
The number of revolutions per second, at which the handle is rotated in process of finding the liquid limit is _________
2
7
4
9
Explanation:
In liquid limit apparatus, the handle is rotated at a rate of about 2 revolutions per second.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
The soviet liquid limit device is based on the principle of ___________
Station penetration
Soil moisture
Soil water content
None of the mentioned
Explanation:
Static cone penetration method is used in operation of soviet liquid limit device.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
One-point method, used for determining the liquid limit is majorly applicable for finding ________
Accurate value
Precise value
Rough value
None of the mentioned
Explanation:
Since the liquid limit is found out by only one reading of water content and its corresponding number of blows. One point method is applicable for finding rough value.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
What is the diameter of the sieve that is used for finding the liquid limit?
275 microns
700 microns
425 microns
200 microns
Explanation:
425 micron sieve is used as a standard, for filtering the given specimen.