Environmental Engineering - Online Test
Q1. Match the given water properties in Group-I to the given titrants shown in
Group-II
Answer : Option C
Explaination / Solution:
No Explaination.
Q2. A 1 hour rainfall of 10 cm has return period of 50 year. The probability that
1 hour of rainfall 10 cm or more will occur in each of two successive years is
Answer : Option D
Explaination / Solution:
Return period of rainfall, T = 50 years
Probability of occurrence once in 50 years, p = 1/50 = 0.02
Probability of occurrence in each of 2 successive years = p2 = (0.02)2 = 0.0004
Q3. An isohyet is a line joining points of
Answer : Option C
Explaination / Solution:
No Explaination.
Q4. In compacted cylindrical bituminous mix, VMA = 15%(void mineral aggregate); Vv = 4.5% (air void) The magnitude of VFB (void filled bituminous) is
Answer : Option D
Explaination / Solution:
VFB = VB/Vv = ((15-4.5)/15)×100% = 70%
Q5. Elevation and temperature data for places are tabulated below
Based on this data, lapse rate can be referred as
Answer : Option A
Explaination / Solution:
Ambient lapse rate = ((21.25 - 15.70)/(444 - 4))×1000 = 12.6 oC/km[>9.8 oC/km]
When the ambient lapse rate exceeds the adiabatic lapse rate, the ambient lapse
rate is said to be super adiabatic.
Q6. Storm-I of duration 5 hours gives a direct run-off of 4 cm and has an average
intensity of 2cm / hr
Storm-II of 8 hour duration gives a run-off of 8.4 cm.
(Assume φ -index is same for both the storms.)
The value of φ − index is
Answer : Option A
Explaination / Solution:
φ - index = (2×5-4)/5 = (10-4)/5 = 6/5 = 1.2 cm/hr
Q7. Storm-I of duration 5 hours gives a direct run-off of 4 cm and has an average
intensity of 2cm / hr
Storm-II of 8 hour duration gives a run-off of 8.4 cm.
(Assume φ -index is same for both the storms.)
Intensity of storm-II in cm/hr is
Answer : Option D
Explaination / Solution:
Let intensity of storm-II be P cm/hr 1.2 = (P×8-8.4)/8 ⇒ 1.2 × 8 +8.4 = P×8 ⇒ P = 2.25 cm/hr
Q8. The number of independent elastic constants for a linear elastic isotropic and
homogeneous material is
Answer : Option C
Explaination / Solution:
No Explaination.
Q9. A coastal city produces municipal solid waste (MSW) with high moisture content,
high organic materials, low calorific value and low inorganic materials. The most
effective and sustainable option for MSW management in that city is
Answer : Option A
Explaination / Solution:
No Explaination.
Q10. According to the Noise Pollution (Regulation and Control) Rules, 2000, of the
Ministry of Environment and Forests, India, the day time and night time noise
level limits in ambient air for residential areas expressed in dB (A) Leq are
Answer : Option B
Explaination / Solution:
No Explaination.
