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Browse complete papersThe relationship between the elastic modulus (E) and shear modulus (N) of a material is given by E = 3 N. Determine the poisson’s ratio of the material.
0.3
0.5
0.25
0.75
Correct answer
0.3
As per IS 10500 : 2012, in drinking water, the permissible limits of Turbidity in the absence of an alternate source is :
5 NTU
7.5 NTU
1 NTU
10 NTU
Correct answer
5 NTU
The shear force diagram for a cantilever beam of span L as shown in figure, subjected to a concentrated load W at the free end and a uniformly distributed load of intensity w /m length is :
Rectangular with parallel sides of (W + w. L) at the two ends.
Trapezium with parallel sides of W at the free end and (W + 0.5 w. L2) at the fixed end
Right angled Triangle with zero value at the free end and (W + w. L) at the fixed end.
Trapezium with parallel sides of W at the free end and (W + w. L) at the fixed end
Correct answer
Rectangular with parallel sides of (W + w. L) at the two ends.
Given below are six chemicals (with codes for identification) that are used in the water treatment process. Identify the chemicals that cannot be used as coagulants in the coagulation process.
P – Aluminium sulfate, Q - calcium hypochlorite; R - Ferric Chloride; S – Sodium hydroxide; T - Potassium aluminum Sulphate; U – Ammonium Sulphate Use codes for answering.
Q, S, U
S and T
Q and S
P, R, T
Correct answer
Q, S, U
Estimate the power transmitted (in kW units) by a solid circular shaft of diameter 200 mm at 120 rpm if the torque on the shaft is 80000 Nm.
320 π
80 π
640 π
160 π
Correct answer
320 π
Among the different intakes to draw water, multiple inlets at different depths are not provided in this type of intake; identify it :
Canal Intake
Weir Intake
Reservoir Intake
River Intake
Correct answer
Canal Intake
A rectangular short column ABCD of 500 mm × 200 mm cross section carries a load of 10 kN which is off the geometric axis by 100 mm in the vertical plane bisecting the thickness, at point P as shown in figure. Which faces of the section have the maximum and minimum intensity of stress induced in it? (Use codes MX to indicate maximum stress, and MN to indicate minimum stress in options)
MX on BC ; MN on AB
MX on CD ; MN on AD
MX on BC ; MN on AD
MX on AB ; MN on DC
Correct answer
MX on BC ; MN on AB
The following statements (S1 and S2) pertain to the effect of factors affecting the workability of concrete.
S1 : High ratio of volume of coarse aggregate to fine aggregate results in higher workability of the concrete mix (keeping all other parameters of mix constant).
S2 : As the placing time of concrete increases, the workability of the mix decreases.
S1 is False and S2 is True
Both S1 and S2 are True
Both S1 and S2 are False
S1 is True and S2 is False
Correct answer
S1 is False and S2 is True
The addition of Admixtures in the form of Plasticizers (Water reducers) are done to concrete to achieve some desired properties, and are listed as options. Identify the False /incorrect answer.
To achieve the same workability by decreasing the cement content so as to reduce the heat of hydration in mass concrete.
To have a delay in the setting time of concrete, so as to achieve a delay in hardening, when concreting is done in hot weather.
To increase the workability so as to ease placing in inaccessible locations.
To achieve higher strength by decreasing the water cement ratio at the same workability as an admixture- free mix.
Correct answer
To achieve the same workability by decreasing the cement content so as to reduce the heat of hydration in mass concrete.
As per IS (IS 12600 : 1989) specification for initial setting time of Low heat Portaland Cement (LHPC), when tested by the Vicat apparatus method described in IS 4031 (Part 5): 1988, of the following statement is given.
"The initial setting time of LHPC, shall not be less than 30 minutes"
Check whether the statement is correct. If incorrect, give the correct statement.
Incorrect statement ; "The initial setting time of LHPC, shall not be less than 60 minutes"
Incorrect statement ; "The initial setting time of LHPC, shall not be less than 20 minutes"
Correct statement. No modification
Incorrect statement ; "The initial setting time of LHPC shall not be greater than 60 minutes"
Correct answer
Incorrect statement ; "The initial setting time of LHPC, shall not be less than 60 minutes"