Know your strengths and practice your concepts with this quiz on NHPC JE Recruitment 2021. This quiz for NHPC JE Recruitment 2021 is designed specially according to NHPC Syllabus 2021.
Quiz: Civil Engineering
Each question carries 1 mark
Negative marking: 1/4 mark
Time: 8 Minutes
Q1. A vertical plate of a plate girder is called
(a) Web plate
(b) Flange plate
(c) Cover plate
(d) None of these
Q2. An aggregate is said to be flaky if its least dimension is less than …………….
(a) 1/5th of mean dimension
(b) 2/5th of mean dimension
(c) 3/5th of mean dimension
(d) 4/5th of mean dimension
Q3. A line joining some fixed points on the main survey lines, is called a
(a) Check line
(b) Tie line
(c) Base line
(d) None of these
Q4. In absence of detailed design, the percentage for steel concrete may be taken approximately for beams is
(a) 0.7% to 1.0%
(b) 1.0% to 2.0%
(c) 1.0% to 5.0%
(d) 0.5% to 0.8%
Q5. Which of the following method is not a direct stream flow measurement technique?
(a) Dilution method
(b) Ultrasonic method
(c) Area-velocity method
(d) Slope-area method
Q6. The type of cement used in lining of deep tube wells is:
(a) Blast furnace slag cement
(b) Portland pozzolana cement
(c) Oil well cement
(d) High alumina cement
Sol. A vertical plate of a plate girder is called web plate. The thickness and depth of web plate depends upon bending moment and shear stress acting on the plate.
Sol. An aggregate is said to be flaky it the percentage of particle having their least size smaller than 3/5th of their mean dimension.
Sol. Lines used in surveying →
Main line → These lines connect main stations also called survey line or chain line.
Check line → It is used to check the accuracy of work.
Base line → It is the biggest central line which divide the whole area into two parts.
Tie line → It is used for detailing of features or nearby objects in area and join some fixed points on the main survey line.
Sol. In the absence of detailed design, the percentage of steel is taken as-
In case of raft foundation → 0.5% to 0.8%
In case of slab → 0.7% to 1.0%
In case of beam → 1.0% to 2.0%
In case of column → 1.0% to 5.0%
Sol. Slope area method is not a direct stream flow measurement technique. This method is used for high water marks and wash lines. Manning’s equation is used in this method to calculate the discharge.
Q=1/n AR^(2/3) S^(1/2)
n= Meaning’s co-efficient
R= Hydraulic mean radius
S= side slope
Sol. Portland – Pozzolana cement (PPC) is used in lining of deep tube wells. It is manufactured by grinding OPC and Pozzolana (containing fly ash 10 to 25% by mass). It is also used in mass concreting and places of high temperature.