Civil Engineering - Online Test
Q1. Deposit with flocculated structure is formed when
Answer : Option A
Explaination / Solution:
No Explaination.
Q2. Two primary air pollutants are
Answer : Option C
Explaination / Solution:
No Explaination.
Q3. The target mean strength fcm for concrete mix design obtained from the characteristic strength
fck and standard deviation σ, as defined in IS:456-2000, is
Answer : Option D
Explaination / Solution:
No Explaination.
Q4. The transplantation of rice requires 10 days and total depth of water required
during transplantation is 48 cm. During transplantation there is an effective
rainfall (useful for irrigation) of 8 cm. The duty of irrigation water in hectare/
cumecs is
Answer : Option B
Explaination / Solution:
D = 864B / ∆ hectares / cumecs = (864×10)/((48-8)×10) = 216 hectares / cumecs
Q5. The value of 
where δ(t) is the Dirac delta function, is
where δ(t) is the Dirac delta function, is
Answer : Option A
Explaination / Solution:
Q6. Dilatancy correction is required when a strata is
Answer : Option C
Explaination / Solution:
No Explaination.
Q7. Match List-I (Estimation method) with List-II (Corresponding indicator) and
select the correct answer using the codes given below the lists :
List-I List-II
a. Azide modified Winkler method
for dissolved oxygen 1. Eriochrome Black T
b. Dichromate method for chemical
oxygen demand 2. Ferroin
c. EDTA titrimetric method for
hardness 3. Potassium chromate
d. Mohr or Argentometric method
for chlorides 4. Starch
Codes:
Answer : Option B
Explaination / Solution:
No Explaination.
Q8. The modulus of elasticity, E = 500√fck where fck is the characteristic compressive strength
of concrete, specified in IS:456-2000 is based on
Answer : Option B
Explaination / Solution:
No Explaination.
Q9. A multistorey building with a basement is to be constructed. The top 4 m
contains loose silt below which dense sand layer is present upto a great depth.
Ground water table is at the ground surface. The foundation consists of the
basement slab of 6 m width which will rest on the top of dense sand as shown in
figure. For dense sand saturated unit weight is 3 20kN / m3 and bearing
capacity factor, Nq = 40, Nγ = 45, for loose silt saturated unit
weight = 18kN / m3 , Nq = 15, Nγ = 20 . Effective cohesion is 0. Neglect depth factor
average elastic modulus E, and Poisson ratio µ of dense sand is 60 ×102 kN / m2 and 0.3 respectively, using factor of safety = 3. (Take influence
factor = 2)
The net safe bearing capacity (in kN / m3) of foundation is
Answer : Option C
Explaination / Solution:
Q10. Let the eigenvalues of a 2 x 2 matrix A be 1, -2 with eigenvectors x1 and x2 respectively. Then the eigenvalues and eigenvectors of the matrix A2 − 3A + 4I would, respectively, be
Answer : Option A
Explaination / Solution:
