Why India’s Roads Crack During Rainy Season? | Civil Engineering Explained

 

Why India’s Roads Crack During Rainy Season? | Civil Engineering Explained 🚧🌧️

Every year during the monsoon, roads across India develop cracks, potholes, and surface failures. But have you ever wondered why this happens so frequently?

This is not just a construction problem — it is a major Civil Engineering challenge involving soil mechanics, drainage systems, material quality, and road design.





1. Poor Drainage System 💧

One of the biggest reasons behind road damage is improper drainage.

When rainwater stays on the road surface:

  • Water enters small cracks
  • Weakens the base layer
  • Reduces soil strength
  • Causes pavement failure

Good drainage design is essential for long-lasting roads.


2. Weak Soil Foundation 🌍

Roads are only as strong as the soil beneath them.

In many regions:

  • Clay soil expands during rain
  • Soil loses bearing capacity
  • Roads begin to settle unevenly

Civil engineers perform soil testing before road construction to avoid these failures.


3. Low-Quality Construction Materials 🏗️

Using poor-quality bitumen, aggregates, or improper mix design can reduce road durability.

Common mistakes:

  • Incorrect bitumen content
  • Poor compaction
  • Low-quality aggregates

These issues become more visible during heavy rainfall.


4. Overloaded Vehicles 🚛

Heavy trucks carrying loads beyond legal limits create excessive stress on pavements.

This leads to:

  • Surface cracks
  • Rutting
  • Structural deformation

Roads designed for limited loads fail quickly under excessive traffic pressure.


5. Temperature & Weather Effects ☀️🌧️

Continuous heating and cooling cause expansion and contraction of pavement materials.

During monsoon:

  • Water weakens the structure
  • Heat softens bitumen
  • Repeated stress creates potholes

Modern Solutions Used by Civil Engineers 🚀

Today engineers use advanced techniques such as:

  • Geotextiles
  • Polymer Modified Bitumen
  • Smart Drainage Systems
  • Rigid Pavements
  • AI-based Road Monitoring

These technologies improve road life and reduce maintenance costs.


Future of Road Construction in India 🇮🇳

India is rapidly upgrading highways using modern civil engineering technologies.

Projects like:

  • Expressways
  • Smart Highways
  • Green Roads
  • Sustainable Pavements

are changing the future of transportation.


Final Thoughts

Road construction is much more than laying asphalt. It requires proper planning, engineering design, quality materials, and maintenance.

Civil Engineers play a critical role in building safer and longer-lasting infrastructure for the future.

💬 Do you think Indian roads need better engineering standards? Share your opinion below!

Ghar Ka Foundation Kitna Gehra Hona Chahiye?

Ghar Ka Foundation Kitna Gehra Hona Chahiye? 🏠




Galat Foundation = Ghar Me Crack? 😱

Jab bhi koi ghar banane ka plan karta hai, sabse important sawal hota hai — ghar ka foundation kitna gehra hona chahiye? Bahut log sochte hain ki har ghar ka foundation same hota hai, lekin sach ye hai ki foundation depth har jagah aur har ghar ke liye alag ho sakti hai

Agar foundation sahi depth par na ho, to future me diwaron me crack, building settlement aur structural problems aa sakti hain. Isliye foundation ko lightly lena bahut bada risk ho sakta hai।

Foundation Ki Depth Kis Baat Par Depend Karti Hai?

1. Soil Type (मिट्टी का प्रकार)

Foundation ki depth sabse zyada soil condition par depend karti hai।

  • Hard soil ya rocky soil me kam depth bhi kaafi ho sakti hai।
  • Soft soil ya black cotton soil me zyada depth ki zarurat pad sakti hai kyunki mitti baith sakti hai।

Isliye professional engineer aksar soil test karne ki salah dete hain।

2. Building Load (बिल्डिंग का वजन)

Agar aap:

  • Single floor ghar bana rahe hain 🏠
    to requirement alag hogi।

Aur agar:

  • 2 ya 3 floor building bana rahe hain 🏢
    to foundation aur strong aur gehra ho sakta hai।

Simple si baat hai — jitna zyada load, utna strong foundation chahiye

3. Number of Floors

Bahut log future me extra floor banane ka plan rakhte hain। Aise me foundation ko starting se hi us hisab se design karna zaruri hota hai।

Aaj paisa bachane ke chakkar me weak foundation banwana, kal lakhon ka nuksan kara sakta hai।

Aam Taur Par Foundation Kitna Gehra Hota Hai?

General residential gharon me foundation lagbhag 3–5 feet ya usse zyada ho sakta hai। Lekin ye koi fixed rule nahi hai। Exact depth soil test, structural design aur engineer ke calculation par depend karti hai।

Ek Badi Galti Jo Log Karte Hain ❌

Bahut log padosi ke ghar ko dekh kar bol dete hain:
“Uska 4 feet foundation hai, hamara bhi utna hi kar do.”

Ye approach galat ho sakti hai, kyunki har plot ki soil condition aur building load alag hota hai।



Conclusion




Agar aap ghar bana rahe hain, to foundation par compromise mat kariye। Strong ghar ki shuruaat strong foundation se hoti hai। Sahi foundation aapke ghar ko saalon tak safe aur crack-free rakhne me madad karta hai।

Aap kitne floor ka ghar bana rahe hain? Comment me zarur batayein! 👇


Rainwater Harvesting: भविष्य की सबसे जरूरी Civil Engineering Technology

 

Rainwater Harvesting: Civil Engineering का भविष्य बदलने वाली तकनीक 💧🏗️

भारत में पानी की कमी तेजी से बढ़ती जा रही है। बढ़ती जनसंख्या, शहरीकरण और भूजल स्तर में गिरावट के कारण आने वाले समय में जल संकट और गंभीर हो सकता है। ऐसे में Rainwater Harvesting एक ऐसी तकनीक बन चुकी है जो भविष्य के Sustainable Construction और Civil Engineering का महत्वपूर्ण हिस्सा है।


Rainwater Harvesting क्या है? 🌧️

Rainwater Harvesting एक ऐसी प्रक्रिया है जिसमें बारिश के पानी को इकट्ठा करके भविष्य में उपयोग के लिए सुरक्षित रखा जाता है। यह पानी:

  • भूमिगत टैंकों में स्टोर किया जा सकता है
  • भूजल स्तर बढ़ाने के लिए जमीन में भेजा जा सकता है
  • घरेलू और औद्योगिक कार्यों में उपयोग किया जा सकता है








Civil Engineering में इसका महत्व 🏢

आज हर आधुनिक building project में Rainwater Harvesting System को शामिल किया जा रहा है। यह केवल पानी बचाने का तरीका नहीं बल्कि Sustainable Infrastructure का महत्वपूर्ण भाग बन चुका है।

Civil Engineers इसके माध्यम से:

  • Water Management सुधारते हैं
  • Urban Flooding कम करते हैं
  • Groundwater Recharge बढ़ाते हैं
  • Environment Friendly Structures बनाते हैं

Rainwater Harvesting System के मुख्य भाग ⚙️

1. Catchment Area

वह क्षेत्र जहाँ बारिश का पानी गिरता है, जैसे:

  • Roof Top
  • Open Ground

2. Conveyance System

Pipes और drains जो पानी को स्टोरेज तक पहुँचाते हैं।

3. Filtration Unit

पानी से गंदगी हटाने के लिए filter system लगाया जाता है।

4. Storage Tank

Filtered पानी को storage tank में जमा किया जाता है।

5. Recharge Pit

अतिरिक्त पानी को जमीन में भेजकर groundwater recharge किया जाता है।


Rainwater Harvesting के फायदे 🌱

💧 पानी की बचत

बारिश के पानी का सही उपयोग करके हजारों लीटर पानी बचाया जा सकता है।

🌍 Groundwater Recharge

भूजल स्तर को बढ़ाने में मदद मिलती है।

⚡ कम Water Bills

नगरपालिका के पानी पर निर्भरता कम होती है।

🌧️ Urban Flood Control

शहरों में जलभराव की समस्या कम होती है।

🏗️ Sustainable Construction

Green Building Projects के लिए यह आवश्यक बनता जा रहा है।


भारत में Rainwater Harvesting की जरूरत 🇮🇳

दिल्ली, मुंबई, चेन्नई और बेंगलुरु जैसे शहरों में पानी की समस्या लगातार बढ़ रही है। कई राज्यों में नए building approvals के लिए Rainwater Harvesting System अनिवार्य कर दिया गया है।


Civil Engineering Students के लिए Opportunity 🚀

अगर आप Civil Engineering Student हैं तो आपको:

  • Water Resource Engineering
  • Sustainable Design
  • Environmental Engineering
  • Urban Planning

जैसे विषयों पर विशेष ध्यान देना चाहिए क्योंकि आने वाले समय में इन skills की मांग तेजी से बढ़ेगी।


निष्कर्ष

Rainwater Harvesting केवल पानी बचाने की तकनीक नहीं बल्कि भविष्य की आवश्यकता है। Civil Engineers इस तकनीक के माध्यम से Sustainable और Smart Infrastructure तैयार कर सकते हैं।

💬 क्या आपके शहर में Rainwater Harvesting अनिवार्य है? Comment करके जरूर बताइए!

Green Building Revolution 2026 🌱

 Green Building Revolution 2026 🌱


कैसे बदल रही है Green Construction भारत का भविष्य?

आज की दुनिया में केवल मजबूत इमारतें बनाना ही काफी नहीं है। अब समय है ऐसी इमारतें बनाने का जो पर्यावरण को नुकसान न पहुँचाएँ, बिजली बचाएँ और आने वाली पीढ़ियों के लिए बेहतर भविष्य तैयार करें। यही कारण है कि Green Building Revolution तेजी से पूरी दुनिया में फैल रही है — और भारत भी इसमें पीछे नहीं है।


आखिर Green Building क्या होती है? 🏢


Green Building ऐसी इमारत होती है जिसे इस तरह डिजाइन किया जाता है कि:


बिजली की कम खपत हो

पानी की बचत हो

प्रदूषण कम हो

प्राकृतिक रोशनी और हवा का अधिक उपयोग हो

पर्यावरण को न्यूनतम नुकसान पहुँचे


इन भवनों में आधुनिक तकनीक और eco-friendly materials का उपयोग किया जाता है।


Green Construction क्यों बन रहा है Future? 🌍

1. बिजली की भारी बचत ⚡


Green Buildings सामान्य इमारतों की तुलना में 30–50% तक कम बिजली खर्च करती हैं।


2. पानी की बचत 💧


Rainwater Harvesting और Water Recycling सिस्टम पानी की बर्बादी रोकते हैं।


3. कम Maintenance Cost 💰


शुरुआती लागत थोड़ी अधिक हो सकती है, लेकिन लंबे समय में खर्च काफी कम हो जाता है।


4. बेहतर स्वास्थ्य 😷


Natural ventilation और sunlight से लोगों की productivity और health बेहतर होती है।


Green Building में इस्तेमाल होने वाली Modern Technologies 🚀

🌞 Solar Panels


बिजली उत्पादन के लिए सौर ऊर्जा का उपयोग।


🌧️ Rainwater Harvesting


बारिश के पानी को स्टोर करके उपयोग करना।


🌿 Green Roofs


छतों पर पौधे लगाने से तापमान कम रहता है।


♻️ Recycled Materials


प्लास्टिक, फ्लाई ऐश और recycled steel का उपयोग।


💡 Smart Lighting Systems


Automatic LED systems बिजली बचाते हैं।


भारत में तेजी से बढ़ रहा है Green Construction 🇮🇳


भारत में Smart Cities Mission और Sustainable Development Projects के कारण Green Buildings की मांग तेजी से बढ़ रही है।


बड़े शहरों में:


Delhi

Mumbai

Bengaluru

Hyderabad


Green certified projects की संख्या लगातार बढ़ रही है।


Civil Engineers के लिए Golden Opportunity 👷


भविष्य में कंपनियाँ ऐसे engineers को ज्यादा preference देंगी जिन्हें:


Sustainable Design

Green Materials

BIM Technology

Energy Efficient Planning


की जानकारी होगी।


अगर आप Civil Engineering Student हैं, तो यह skill आपके career को नई ऊँचाई दे सकती है।


Future Prediction 🔥


Experts के अनुसार आने वाले 10 वर्षों में:


Green Buildings construction industry का सबसे बड़ा trend बनेगा

Traditional buildings की demand कम होगी

Eco-friendly construction mandatory हो सकता है

निष्कर्ष


Green Building Revolution केवल एक trend नहीं बल्कि भविष्य की आवश्यकता है।

जो Civil Engineers आज sustainable construction सीखेंगे, वही कल industry के leaders बनेंगे।


🌱 क्या आप Green Construction को भारत का भविष्य मानते हैं? अपनी राय Comment में जरूर बताइए!

NBCC JE CIVIL ENGINEERING 2022 QUESTION WITH ANSWER

NBCC JE  CIVIL ENGINEERING 2022 QUESTION WITH ANSWER




1      The substance bar is used to measure ?

"Vertical distance
Horizontal distance (Correct Answer)
 Level difference
Vertical angle"





2      What is the desirable limit of Calcium in drinking water as per IS 10500:2012?

"20 mg/l
50 mg/l
75 mg/l  (Correct Answer) 
100 mg/l"





3      What is the compressive strength of M-25 concrete?

"25 kg/sqm
25 N/sq.mm  (Correct Answer) 
250 N/sqm
25 N/sqm"






4      1 bag of 50 kg cement =   

             
"0.225 Cu. m.
0.034 Cu. m.  (Correct Answer)
0.17 Cu. m.
0.30 Cu. m."






5      The ratio of surface tension of a spherical droplet and hollow bubble of same diameter is

"1:1
1:2  (Correct Answer)
2:1
3:1"





6  How many of the following instruments are correctly matched with their purpose / what they measure? 

 1. Vee-Bee apparatus - Workability or consistency of concrete mix
 2. Le Chatelier Flask - Specific gravity of
hydraulic cement
 3. Vicat apparatus - Initial and final setting times of cement

"0
1
2
3  (Correct Answer)"




7      In a litre of paint, the volume of solid pigment is 400 cc and volume of non-volatile binder is 600cc. What is the pigment volume concentration number of the paint?


"400
200
40  (Correct Answer) 
4"








8      The ratio of total elongation of a bar of uniform cross-section produced under its own weight to the elongation produced by an external load equal to weight of the bar, would be
"2
1
0.5  (Correct Answer)
 0.25"




9      The value of Poisson ratio is generally not greater than


"0.05
1
0.5  (Correct Answer) 
1.5"





10      The percentile speed which is considered as upper safe unit for vehicles is

"15th percentile speed
85th percentile speed  (Correct Answer) 
98th percentile speed
None of the above"





"11 ) A Cipoletti weir has side slope of         "

"1 horizontal : 1 vertical
1 horizontal : 2 vertical
1 horizontal : 3 vertical
1 horizontal : 4 vertical  (Correct Answer)"



12      When is a floating body is in stable equilibrium?

"When its metacentric height is zero
When the centre of gravity of the body is below the centre of buoyancy 
When its metacentre is above the centre of gravity of body  (Correct Answer) 
In none of the above situations"






13      When the declination of magnetic bearing is towards west then,   
    
"True bearing = magnetic bearing + declination
True bearing = magnetic bearing – declination  (Correct Answer) 
True bearing + magnetic bearing = declination
None of the above"



14      Stoke is the Unit of .........


"Kinematic viscosity in CGS Unit  (Correct Answer) 
Kinemtatic viscosity in MKS Unit
Dynamic viscosity in MKS Unit
Dynamic viscosity in SI Unit"



15      The radius of Mohr’s circle for two unlike principal stresses of magnitude p is:

"p/4
 p/2
p  (Correct Answer)
2p"




16      In simply supported beam of rectangular cross section, at the neutral axis, the bending stress is         and shear stress is            .

"Zero, maximum  (Correct Answer)
Maximum, zero
Zero, zero
Maximum, maximum"


17      Which of the following is a ductile material?
"cast iron
copper  (Correct Answer)
 glass
concrete"



18      The soils having SPT value in between 0 & 2, will have the consistency as

"Very soft  (Correct Answer) 
Medium
Hard
Stiff"


"19      If the original cost of a building is Rs.1,00,000/-, scrap value is Rs. 1,000/- and life of the property is 99 years, the Annual Depreciation calculated by Straight Line Method is       "


"100
1000  (Correct Answer)
90
10000"




20      In BOT (Build-Operate-Transfer) based project, the most important evaluation criterion is

"financial internal rate of return internal rate of return
benefit-cost ratio  (Correct Answer)
present value"




21      Which of the following type of Bituminous emulsion is suitable for surface dressing and penetration macadam type of construction?

 i) Rapid setting (RS) type
 (ii) Medium setting (MS) type

"i only  (Correct Answer) 
ii only
both i and ii
neither i nor ii"

22      Calculate the ratio of Active Earth pressure to Passive Earth Pressure if it is given that the value of internal friction for sandy soil is 30 degrees.


"1/9  (Correct Answer) 
9
3
1/3"
23      Two circular copper bars of equal lengths have diameter ratio 1:2. When each bar is subjected to the same tensile load, the corresponding ratio of elongations will be:
"4:1  (Correct Answer)
1:4
2:1
1:2"



24      The relation between intermediate sight distance (ISD) and stopping sight distance (SSD) is
"ISD = 2 × SSD  (Correct Answer)
 ISD = 3 × SSD
ISD = 4 × SSD
ISD = 5 × SSD"



25      What is Khosla's formula used to calculate?

"Runoff  (Correct Answer) 
Precipitation Evaporation
All of the above"


26      The relation between surface tension (σ), diameter & difference of pressure between inside and outside of a liquid drop is
"P = 4σ/d  (Correct Answer)
 P = 8σ/d
P = 2σ/d
P = 3σ/d"


27      The formula for calculation of toughness index of soil mass is

"Plasticity index / Flow index  (Correct Answer)
 Plasticity index × flow index
Plasticity index – flow index
Flow index / plasticity index"


"28      In the case of OPC, for the cement to possess the property of SOUNDNESS, the quantity of GYPSUM is       
% of clinker"

"3 to 5  (Correct Answer)
8 to 10
10 to 12
12 to 13"



29      What is classification of soil if the degree of saturation of soil mass is 0%?


"dry  (Correct Answer) 
partially saturated
 fully saturated
incorrect data"



30      In Ultimate Load Method, the load used in the design of R.C.C. structures refers to
"Total collapse load

Working load multiplied by a load factor  (Correct Answer)
 Working load divided by a load factor
Plastic load"



31      Travel behaviour characteristics of an urban area can be derived from         .
Parking Survey

"Demographic Survey
 Socio Economic Survey
Origin & Destination Survey  (Correct Answer)"




32      Bulk modulus [K] is ratio of ?

"Volumetric strain / Normal stress
Normal stress / Volumetric strain  (Correct Answer)
 Linear strain / Normal stress
Normal stress / Linear strain"


33      If the average monthly demand of domestic water in a city is q unit, the maximum monthly demand will be

"1.28q  (Correct Answer) 
1.48q
1.5q
2.7q"




34      In a liquid jet of radius ‘r’, the surface tension is expressed as             , where ‘Δp’ is the pressure of the liquid.

"Δp /r
Δp × r  (Correct Answer) 
r/ Δp
r + Δp"



"35      The ratio of slope at free end in cantilever beam having uniform load intensity to varying load intensity
maximum at fixed end, would be"

"0.25
7.5
0.4
4  (Correct Answer)"




36      Along the grains, tensile strength of timber is   

    the corresponding compressive strength
"same less than not comparable
more than  (Correct Answer)"



37      Distemper is used on         
"Brick walls
Plastered surface exposed to weather Concrete surface
Plastered surface not exposed to weather  (Correct Answer)"





38      Expansion joints are generally provided at [ For smooth interface]
"50 m  (Correct Answer) 
30 m
5 m
none"




39      The process which is used for obtaining petroleum bitumen is

"atmospheric vacuum distillation  (Correct Answer) 
destructive distillation
liquefaction
none of the above"



40      What is the minimum grade of concrete to be used for pre-tensioned structural element as per IS 1343:1980?

M10
"M20
 M30
M40  (Correct Answer)"





"42      As per the Indian Standard soil classification system, a sample of silty clay with plasticity index of 28% and
liquid limit of 40% and classified as       "


"CH
Cl  (Correct Answer) 
CL
CL-ML"



43      Which of the following Bogue components is responsible for the ultimate strength of OPC?

"C3S
C2S  (Correct Answer)
 C3A
C4AF"



44      The concrete recommended for radiation shielding is
"fibre reinforced concrete

heavy weight concrete  (Correct Answer)
 light weight concrete
all of the above"





45      A cork is immersed in a jar of water and released. How the cork will move if the jar is assumed to be kept in a satellite orbiting earth:

rise
"sink
remains where left  (Correct Answer)
 none of these"



46      A square based regular pyramid has all sides equal to 10 m. Its height is approximately equal to              m.
"10
14"
"7  (Correct Answer)
5"




47      Which of the following processes can be used for corrosion prevention method of cast iron?
i) Painting 
ii) Epoxy coating 
iii) Quenching 
iv) Galvanizing

"i, ii and iv  (Correct Answer)
 i, ii and iii
i only
iii only"




48      Falling drops of water become spherical because of below properties of fluid ?
"Surface tension  (Correct Answer) 
Cohesion
Adhesion
Viscosity"





49      Type of Earth pressure that exists in case of deep basement wall is       
"Active Earth pressure 
Passive Earth pressure
At rest Earth pressure  (Correct Answer)
Sometimes active, sometimes passive Earth pressure"




50      The shape of transition curve recommended by Indian Railway is
"Circular
Spiral"
"Cubic Parabolic  (Correct Answer)
Lemniscates"


51      Which of the following property/properties is/are possessed by Joint filler?
"Compressibility Elasticity
Durability"
All of the above  (Correct Answer)




52      The correct group symbol of "clayey sand" is

"SM 
OH
SC  (Correct Answer)
GC"




53      For mesurement of Quantity degree of accuracy for volume is taken as .....

"0.01 cu meter  (Correct Answer) 
1 cu meter
10 cu meter
100 cu meter"




54      The correct formula for calculating hydraulic gradient is G : specific gravity of soil solids E : void ratio


"(G - 1) / 1 + e  (Correct Answer)

 (G + 1) / 1 + e
(G - 1) / 1 - e
(G + 1) / 1 - e"




55      Shear stress is_______________ at Neutral axis for rectangular section .

"Maximum  (Correct Answer) 
Minimum
Avergae"
Zero


56      For designing of road and geometrics in India,                      
  traffic volume is considered.


"30th highest hourly  (Correct Answer)
 40th highest hourly
50th highest hourly
60th highest hourly"


57      The centrifugal ratio adopted in design of horizontal curve is defined as
"Weight of the vehicle/Centrifugal force 
Weight of the vehicle X Centrifugal force 
Centrifugal force/Radius of curvature
Centrifugal force/Weight of the vehicle  (Correct Answer)"


58      If the degree of shrinkage Sr (%) of soil mass is < 5%, then the quality of soil is
"good  (Correct Answer)
 medium good
poor
very poor"




59      For a design speed of 80 kmph, minimum visibility distance at a major road intersection, is       
"200 metres
120 metres  (Correct Answer)
 80 metres
100 metres"




60      How many of the following tests are correctly matched with their purpose? 1. Oven dying method - Determination of water content of soil sample 2. Ring and Ball test - Determination of softening point of bitumen 3. Sand bath method - Water content determination of soil


"0
1
2
3  (Correct Answer)"





61      Reinforced cement concrete is strong in       
"Tensile and compressive stresses  (Correct Answer) 
only tensile stress
only compressive stress
neither tensile nor compressive stresses"




62      As per IS 456:2000, the maximum amount of tensile reinforcement in a reinforced concrete beam shall not exceed ......


"0.012 * b * D
0.015 * b * D
0.03 * b * D
0.04 * b * D  (Correct Answer)"




63      What ingredient is used in the production of Aerated Cement Concrete?

"Aluminum  (Correct Answer)
 Calcium chloride
Gypsum
Sulphur"




64      The strain at yield of reinforcing steel is
"elastic strain + (design yield stress/Young's modulus of steel)  (Correct Answer)
 inelastic strain + (design yield stress/elastic strain)
inelastic strain + (design yield stress/Young's modulus of steel)
elastic strain + (design yield stress/inelastic strain)"




65      Which of the following is NOT an ingredient of primer used on woods?
"RED LEAD WHITE LEAD LITHARGE
NONE OF THE ABOVE  (Correct Answer)"



66      The correct formula for calculation of water content is Ww : weight of water W : overall weight of soil mass Ws : weight of solids


"Ww / W Ww / Ws (Correct Answer)
Ws /W Ws /Ww"   



"67 Units of safe bearing capacity of soil is     "
"N/m kg/m m/s" (Correct Answer)  


68 Mathematically, Plasticity index is given by the difference of

"liquid limit and shrinkage limit  
shrinkage limit and plastic limit liquid limit and plastic limit (Correct Answer) none of these"  


69 As compared to laminar flow, in turbulent flow, boundary layers will be .....

"thinner thicker (Correct Answer)  
same half"  



70 Shear stress in a beam having triangular cross-section is maximum at ...

"extreme top fibre
extreme bottom fibre
neutral axis
mid depth (Correct Answer)" 

71 The radius of 1 degree curve in case of railways is
"1750 m (Correct Answer)
573 m 860 m 2292 m"  


72 What does the noise level L90 represent, in measuring traffic noise?
"background noise level (Correct Answer)
lowest noise level average noise level peak noise level"  

73 If the activity of soil mass is smaller than 0.60 , then the soil is classified as 
"inactive (Correct Answer)  
normal active none of the above" 


74 Find out value of Void ration for Fully Saturated soil having water content 30 % and Specific gravity 2.65
"0.565 0.656 0.795 (Correct Answer) 0.895"  



75 Origin and destination survey helps in identifying
"Desire lines of vehicular traffic flow (Correct Answer)  
Location of main traffic nodes Peak capacity of road Peak capacity of road junctions"  




"76 Which of the following may be used as surface course for roads with low traffic in low rain fall regions? 1. Bituminous stabilized layer 2. Soil-lime stabilized layer 3. Cement-lime stabilized layer" "2 and 3 Only 1 (Correct Answer) 1, 2 and 3 1 and 2"   





77 If the annual net income from a commercial property is Rs. 22,000/-and the interest rate is 8%, then the capitalization value of the property in perpetuity is approx       
          . "350000 275000 (Correct Answer) 175000 88000"  



78 As per IS Soil classification system the silt particles size ranges from                    to  

                       ? "0.075 mm to 4.75 mm 4.75 mm to 20 mm 0.002 mm to 0.075 mm (Correct Answer)
2 mm to 20 mm" 





79 When liquidity index is between 0 and 1 the soil will behave like "Liquid Plastic (Correct Answer) Solid Sand" 


80 The acceptable limit required for lead as per Indian Standard Drinking Water Specifications (IS 10500 : 2012) is "0.01 mg/l (Correct Answer) 0.02 mg/l 0.05 mg/l 0.10 mg/l"  


"81 At the point of inflexion, which of the following is true? a) deflected shape changes curvature b) bending moment is zero"
"only a) 
only b) both a) and b) (Correct Answer) neither a) nor b)"  



82 The ratio of ultimate stress to the permissible stress is called   
                
"Factor of safety (Correct Answer)
Design factor Stress factor Load factor"  



83 Unit of measurement of dynamic viscosity is     
    
"poise (Correct Answer) 
poisson stoke joules"  

84 In consistency test Vicat’s plunger penetrates up to a to mm from the bottom of the
Vicat’s mould. ? "2 to 3 mm 3 to 5 mm 5 to 7 mm (Correct Answer) 7 to 10 mm"   


85 The materials used in Prestressed concrete are
"High strength steel and high strength concrete (Correct Answer)  High strength steel and low strength concrete Low strength steel and high strength concrete Low strength steel and low strength concrete"  





86 In Direct Shear Test, the failure strain for loose sand is  

"12 to 16% (Correct Answer) 2 to 4% 20 to 25% 6 to 8%"  



87 For a composite bar system of length L, change in length of the two members are same".
This is referred to as condition "Equilibrium compatibility (Correct Answer) 
momentum neutral"  




88 Poisson's ratio is
      
"Lateral Strain / Linear Strain (Correct Answer)  
Linear Strain / Lateral Strain Lateral Strain / Linear Stress Load / area"  



89 The age of a tree is determined by    
"Counting the number of rings in the stem cross-section (Correct Answer)  Counting the number of leaves on the branches Measuring the height of the tree Measuring the root and stem ratio" 


90 The Elastic modulus of the material is                   if the Poisson’s ratio of material is 0.5  
"Five times its shear modulus 
Equal to its shear modulus
Three times its shear modulus (Correct Answer) Nine times its shear modulus"



ISRO HSFC Answer Key 2022 PDF | Exam Key, Objections

ISRO HSFC Answer Key 2022 





 Exam Key, Objections:

 Are you looking for the ISRO Technical Assistant Answer Key 2022 ?

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