ZONE TECH Objective Questions Series

Questions

A masonry dam is founded on pervious sand a factor of safety of 4 is required against boiling. For the sand, n = 45% and G_s = 2.65. The maximum permissible upward hydraulic gradient will be nearly
In a falling head permeability test on a soil, the time taken for the head to fail from h₀ to h₁ is t. The test is repeated with same initial head h₀. The final head h' is noted in time t/2. Which one of the following equations gives the relation between h', h₀ and h₁ ?
A soil has bulk density of 20.1 kN/m³ and water content 15%. What is the water content if the soil partially dries to a density of 19.4 kN/m³ and the void ratio remains unchanged?
Assertion (A): Coarser the particles, less is optimum moisture content.
Reason (R): The specific surface area of coarser particles are less.
Which of the following statements are correct as regards aquifer characteristics?

1. The storage coefficient is the volume of water released from storage from the entire aquifer due to unit depression of piezometric head.

2. The storage coefficient is the same as the specific yield for water table aquifer.

3. Both the aquifer constants, viz. storage coefficient S and Transmissivity T are dimensionless numbers.
An 8-hour storm with incremental rainfall during each successive hour is tabulated herewith. What will be the correction to total runoff when, whereas the actual φ index was 0.5 cm/hour, a wrong magnitude of 0.6 cm/hour was adopted in computing the total runoff?

Time from start (hour)

Incremental rainfall in each hour (cm)

1

0.4

2

0.8

3

1.2

4

0.9

5

1.8

6

1.0

7

0.3

8

0.8

Match List-I with List-II and select the correct answer using the code given below the lists:

List-I	List-II
A. Primary sedimentation	1. Differential settling
B. Coagulation	2. Hindered settling
C. Flocculation	3. Charge neutralization
D. Secondary sedimentation	4. Growth of flocs
	5. Flow through velocity

Codes:

A B C D

Match List-I (Parameter) with List-II (General standard for discharge into the inland surface water in mg/l (max)) and select the correct answer using the codes given below the lists:

List-I	List-II
A. BOD (5 day 20° C)	1. 250
B. COD	2. 100
C. Oil and grease	3. 20
D. Suspended solids	4. 10
	5. 30

Codes:

A B C D

Match List-I with List-II and select the correct answer:

List-I	List-II
A. The type of vortex flow in which no external torque rotates the fluid mass	1. The fall of liquid at the axis of rotation
B. Flow of liquid inside the impeller of a centrifugal pump	2. Free vortex flow
C. Free surface of forced vortex flow	3. Parabolic
D. In forced vortex, the rise of liquid level at ends	4. Forced vortex flow

Codes:

A B C D

Questions

Know

Courses

Student

Time from start (hour)	Incremental rainfall in each hour (cm)
1	0.4
2	0.8
3	1.2
4	0.9
5	1.8
6	1.0
7	0.3
8	0.8

Questions

Follow Us