Departmental (other) • 2023 • Engineering Paper-I
As per IS 10500 : 2012, for drinking water in the absence of alternate source of water, the permissible limits for chloride and sulphate, in mg/ L, respectively are
A)
250 and 200
B)
1000 and 400
C)
200 and 250
D)
500 and 1000
Option B is correct: 1000 and 400.
Departmental (other) • 2023 • Engineering Paper-I
The point at which the centrifugal pump operates at maximum efficiency is called
A)
Duty point
B)
Flow point
C)
Static point
D)
Operating point
Option A is correct: Duty point.
Departmental (other) • 2023 • Engineering Paper-I
Wastewater from different sources like bathrooms, kitchens and wash basins is called
A)
Sewage
B)
Garbage
C)
Sullage
D)
Discharge
Option C is correct: Sullage.
Departmental (other) • 2023 • Engineering Paper-I
In pumping stations, the type of joint generally used, is
A)
Socket and spigot joint
B)
Flanged joint
C)
Expansion joint
D)
Dresser coupling joint
Option B is correct: Flanged joint.
Departmental (other) • 2023 • Engineering Paper-I
Which of the following method is used to forecast the population of old and very large city?
A)
Arithmetical increase method
B)
Geometric progression method
C)
Graphical method
D)
Logistic curve method
Option A is correct: Arithmetical increase method.
Departmental (other) • 2023 • Engineering Paper-I
The organic impurities from sewage are removed by
A)
Preliminary treatment
B)
Primary treatment
C)
Secondary treatment
D)
Tertiary treatment
Option C is correct: Secondary treatment.
Departmental (other) • 2023 • Engineering Paper-I
Which is the fastest method of drilling and especially useful in unconsolidated formations?
A)
Cable tool method
B)
Water-jet boring method
C)
Hydraulic Rotary method
D)
Reverse Rotary method
Option B is correct: Water-jet boring method.
Departmental (other) • 2023 • Engineering Paper-I
In which of the following applications DC series motor is used?
A)
Centrifugal Pump
B)
Motor Operation in DC and AC
C)
Water pump drive
D)
Starter for car
Option D is correct: Starter for car.
Departmental (other) • 2023 • Engineering Paper-I
The specific speed of the pump is 8000. What is the type of pump?
A)
Reciprocating pump
B)
Centrifugal pump
C)
Mixed flow pump
D)
Axial flow pump
Option D is correct: Axial flow pump.
Departmental (other) • 2023 • Engineering Paper-I
Critical time for developing a water hammer, is the time required for
A)
Closing the valve
B)
The wave to travel from valve to the reservoir
C)
The wave to travel from the valve to the reservoir and back
D)
Water column separation
Option C is correct: The wave to travel from the valve to the reservoir and back.
Departmental (other) • 2023 • Engineering Paper-I
If an extra resistance is connected in the rotor circuit of slip ring induction motor, then
A)
Starting current and torque decreases
B)
Starting current increases and torque decreases
C)
Starting current decreases and torque increases
D)
Starting current and torque increases
Option C is correct: Starting current decreases and torque increases.
Departmental (other) • 2023 • Engineering Paper-I
Which of the following is correct about direct current?
A)
Magnitude is constant
B)
Frequency is zero
C)
Can be transported to larger distances with less loss in power
D)
Flows in one direction
Option D is correct: Flows in one direction.
Departmental (other) • 2023 • Engineering Paper-I
The chemical formula of alum is
A)
K, SO, .Al, (SO,), .20H,O
B)
KNO, .Al, (SO,), .24H,O
C)
K, SO, .Al, (SO,), .24H,O
D)
K, SO, .Al, (SO,), .21H,O
Option C is correct: K, SO, .Al, (SO,), .24H,O.
Departmental (other) • 2023 • Engineering Paper-I
Which process is used to remove dirt and sand from wastewater?
A)
Aeration
B)
Chlorination
C)
Sedimentation
D)
Flocculation
Option C is correct: Sedimentation.
Departmental (other) • 2023 • Engineering Paper-I
Which of the following motor is used where an extensive range of control is required
A)
AC Motor
B)
DC Motors
C)
Synchronous Motor
D)
Induction Motor
Option B is correct: DC Motors.
Departmental (other) • 2023 • Engineering Paper-I
How does induce emf in DC motor react to supply voltage
A)
It will aid the supply voltage
B)
It will be double the supply voltage
C)
It will oppose the supply voltage
D)
It will be half of the supply voltage
Option C is correct: It will oppose the supply voltage.
Departmental (other) • 2023 • Engineering Paper-I
In reverse osmosis (RO) the flow of solvent is due to
A)
Potential gradient
B)
Vapour pressure gradient
C)
Concentration gradient
D)
Osmosis solvent
Option A is correct: Potential gradient.
Departmental (other) • 2023 • Engineering Paper-I
Which of the following will happen in a transformer when the number of secondary turns is less than the number of primary turns?
A)
The voltage gets stepped up
B)
The voltage gets stepped down
C)
The power gets stepped up
D)
The power gets stepped down
Option B is correct: The voltage gets stepped down.
Departmental (other) • 2023 • Engineering Paper-I
Which of the following tests is performed to detect the leakage of rain water pipe in the testing of house sewers?
A)
Water test
B)
Smoke test
C)
Temperature test
D)
Airtest
Option A is correct: Water test.
Departmental (other) • 2023 • Engineering Paper-I
The maximum pressure to which a pipe is subjected to during its operation, is known
A)
Working pressure
B)
Design pressure
C)
Test pressure
D)
Pipe pressure
Option A is correct: Working pressure.
Departmental (other) • 2023 • Engineering Paper-I
What is called for an area surrounding a body of water in which that body of water is subject to?
A)
Rainwater harvesting
B)
Watershed
C)
Water pumping
D)
Water cycle
Option B is correct: Watershed.
Departmental (other) • 2023 • Engineering Paper-I
How many methods of rainwater harvesting are there?
A)
One
B)
Two
C)
Three
D)
Four
Option B is correct: Two.
Departmental (other) • 2023 • Engineering Paper-I
The Mizoram Water Supply (Control) Rules was recently approved by the Council of Minister meeting held on 18" May 2023 is
A)
The Mizoram Water Supply (Control) Rules Amendment 2023
B)
The Mizoram Water Supply (Control) Rules Repeal 2023
C)
The Mizoram Water Supply (Control) Rules 2023
D)
The Mizoram Water Supply (Control) Rules & Water Tariff 2023
Option C is correct: The Mizoram Water Supply (Control) Rules 2023.
Departmental (other) • 2023 • Engineering Paper-I
If we connect a DC motor across AC supply, then the motor will be
A)
It will not work
B)
Damages
C)
Speed will be reduced
D)
Works efficiently
Option B is correct: Damages.
Departmental (other) • 2023 • Paper-II
Under what circumstances a Government servant may be placed under suspension? What are the points that a Disciplinary Authority should consider before placing a Government servant under suspension?
