| Post Name | ASSISTANT ENGINEER - Ground Water Department |
|---|---|
| Question Paper Code | 168/2025 |
| Category Code | 466/2024 |
| Date of Test | 15 December 2025 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
Which among the following represent control chart for attributes?
(i) R chart; (ii) c chart;
(iii) p chart; (iv) X-bar chart
Answer
C. (ii) and (iii)
2
In the case of transportation problem, where ‘m’ denotes the supply points and ‘n’
denotes the demand points, the solution is non-degerate if :
Answer
A. there are exactly m + n − 1 non-zero allocations and the allocations are in
independent positions.
3
The length of time by which the completion time of any non-critical activity can be
delayed without causing any delay to its immediate successor activities is called :
Answer
B. Free float
4
Which among the following are the features of process layout?
(i) All similar facilities are grouped together.
(ii) Large quantity production, only a few products.
(iii) Sequence of facilities located according to the processing sequence of the product.
(iv) Low quantity production, large range of products.
Answer
D. (i) and (iv)
5
Consider a data set, where one of the data point is zero. Its geometric mean is :
Answer
B. Zero
6
Which of the following is a relative measure of dispersion?
Answer
C. Coefficient of Variation
7
Match the Therbligs indicated in List I with their corresponding color codes indicated
in List II :
List I List II
Answer
D. Use (4) Blue
8
Which among the following organizational structures has the feature of dual reporting?
Answer
A. Matrix
9
When a eutectoid steel is rapidly cooled to a temperature just above the nose of the
TTT curve and held isothermally, the microstructure formed is primarily :
Answer
C. Fine Pearlite
10
Consider the following statements regarding modern steelmaking processes :
(i) In the Basic Oxygen Furnace
Answer
A. Only (i)
11
Which milling machine component is primarily responsible for moving the workpiece in
the X, Y and sometimes Z directions to control feed?
Answer
C. Table
12
A forged steel crankshaft needs to be inspected for internal flaws such as shrinkage
cavities or porosity without cutting or sectioning the component.
Which NDT method is most appropriate?
Answer
C. Ultrasonic testing
13
Consider the following statements regarding gauges used in inspection :
Statement (1) : Plug gauges are primarily used to check internal dimensions such
as hole sizes.
Statement (2) : Snap gauges are used to check external dimensions such as
shaft diameters.
Statement (3) : Feeler gauges are used to measure clearance or gap between
mating parts.
Which of the above statements are correct?
Answer
D. (1), (2) and (3)
14
Consider the following statements about the functions of electrode coatings in
arc welding :
Statement (1) : Electrode coatings supply deoxidizers that help prevent oxygen from
entering and weakening the weld metal.
Statement (2) : The coating forms a slag layer which controls the cooling rate of the
weld and improves bead shape.
Statement (3) : Gases produced from the electrode coatings reduces arc stability
during welding.
Which of the above statements are correct?
Answer
A. (1) and (2) only
15
During a machining operation, the cutting tool begins to produce built-up edge
Answer
B. UE) on
the tool tip.
Which corrective action is most likely to reduce or eliminate the built-up edge?
16
A machinist needs to turn a long, slender shaft that is prone to deflection and vibration
during machining. The operation requires the workpiece to be supported away from the
chuck to maintain accuracy and prevent chatter.
Which lathe accessory should be used?
Answer
C. Steady rest
17
The property by virtue of which fluids undergo a change in volume under the action of
external pressure is known as :
Answer
C. Compressibility
18
SI Unit of surface tension :
Answer
A. N/m
19
Bernoulli’s equation is derived from the principle of conservation of :
Answer
C. Energy
20
A fluid has density of 1000 kg/m3, what is the pressure at a depth of 2 m :
Answer
A. 19.62 kpa
21
The curve which gives an instantaneous picture of the location of the fluid particles,
which have passed through a given point :
Answer
D. Streak line
22
If the operating head available is 100 m and specific speed ranging from 80 to 150 rpm
which turbine is suitable?
Answer
A. Francis
23
The condition for maximum efficiency of a jet of water striking a curved vane when the
vane is moving in the direction of jet is :
Answer
B. Vane velocity = one third of jet velocity
24
For a centrifugal pump the ratio of power out of the pump to the power input to the
pump is known as :
Answer
D. Overall efficiency
168/2025 6 A
25
A bar of circular cross section is subjected to a uniaxial tensile stress, which of the
following statements are correct?
(i) The volumetric strain is zero when Poisson ratio is 0.5.
(ii) The lateral strain is always positive.
(iii) A higher Poisson’s ratio indicates greater lateral contraction for the same
axial strain.
(iv) For perfectly incompressible materials, the bulk modulus is zero.
Answer
B. (i) and (iii) only
26
When a body just begins to move on a horizontal rough surface :
Answer
A. The frictional force decreases slightly and remains constant during motion.
27
Which of the following statements are correct for a simply supported beam?
(i) The shear force at a section is equal to the rate of change of bending moment
at that section.
(ii) The bending moment is maximum where the shear force changes its sign.
(iii) The bending moment diagram under a uniformly distributed load is linear.
(iv) The bending moment at a section is equal to the rate of change of shear force
at that section.
Answer
D. (i) and (ii) only
28
Which of the following statement is correct, for double started square thread?
Answer
C. The lead is twice the pitch
29
Which of the following statements are correct regarding mechanisms where Coriolis
acceleration appears?
(i) Coriolis acceleration always acts opposite to the direction of sliding.
(ii) Coriolis acceleration becomes zero if either the angular velocity of the link or the
sliding velocity becomes zero.
(iii) In a shaper mechanism, Coriolis acceleration may appear when the ram is
connected through a rotating slotted link.
(iv) Coriolis acceleration always acts opposite to centrifugal acceleration.
Answer
A. (ii) and (iii) only
30
Consider two shafts A and B have identical length and are made from the same material.
Shaft A is solid of diameter d, while Shaft B is hollow with same outer diameter d and
an inner diameter 0.6 d. Both shafts must transmit the same torque but must also
satisfy the same angle of twist per unit length. Which shaft requires less material cost
while satisfying this conditions?
Answer
C. Hollow shaft B
31
Which of the following statements are correct?
(i) For involute gears, the velocity ratio remains constant even if the center distance
slightly increases.
(ii) The velocity ratio changes if the pressure angle is changed while keeping the
number of teeth the same.
(iii) In an involute profile, the path of contact shortens if the addendum is increased.
(iv) The pressure angle remains constant throughout the meshing action in involute
gears.
Answer
C. (i) and (iv) only
32
Which of the following statements are correct, bearing characteristics/operation?
(i) Increasing viscosity of the lubricant always increases load-carrying capacity,
regardless of speed.
(ii) A hydrodynamic bearing can generate a supporting pressure only when there is a
relative motion between the journal and the bearing.
(iii) The basic dynamic load rating of a bearing indicates the load under which it can
operate for one million revolutions with 90% reliability.
(iv) Deep-groove ball bearings are better suited for heavy radial loads than cylindrical
roller bearings.
Answer
A. (ii) and (iii) only
33
Which one of the following statements is not true for an Air Standard Otto cycle?
Answer
Question Cancelled
34
Which one of the following statements is not true about the Morse test?
Answer
C. Is used to find the volumetric efficiency of the engine
35
Which one of the following statements is not true about Prandtl number?
Answer
C. It is the ratio of momentum thickness to displacement thickness.
36
The critical radius of insulation (thermal conductivity K, heat transfer coefficient h) of a
spherical shell is given by :
Answer
D. 2K/h
37
In a two stage reciprocating compressor operating between pressures P1 and P3 , the
ideal intermediate pressure (P2 ) is given by :
Answer
C. P1 P3
38
Governing method used in a diesel engine is :
Answer
A. Quality Governing
39
For air with a relative humidity of 70% :
Answer
D. Dew point-temperature is less than wet bulb temperature
40
In a vapour compression refrigeration system with Liquid suction heat exchanger, the
state of refrigerant before it enters the evaporator is :
Answer
D. Wet vapour
168/2025 9 A
41
_____________ is a secondary tillage implement.
Answer
B. Harrow
42
Choose the correct options from the following statement :
(i) Landside is a part of Disc plough.
(ii) Landside is a part of MB plough
(iii) Landside is made of soft centre steel or mild steel or cast iron
(iv) Landside is made of high carbon steel
Answer
D. (ii) and (iii) are correct
43
Choose the correct answer :
Answer
A. Better penetration is achieved at higher disc angle and optimum value
being 44 degrees.
44
The main part of a mower is a cutter bar and is to cut crops and separate it from uncut
portion. Pick up the correct answer after reading carefully the statements below :
(i) The knife sections move back and forth and cut plants in both direction.
(ii) The section of knife should always stop at the centre of the guard on each stroke.
(iii) Guards are provided with ledger plates on which the knife section move.
(iv) Knife clips hold the sections down against the ledger plates but allow it to
move freely.
Answer
D. All statements are correct
45
The main purpose of which of the following unit is; ‘to work as compensating mechanism,
so that when the tractor takes a turn the outer wheel may move faster than the inner
one and still share the load equally and to function as a second speed reduction point in
the tractor power trains’.
Answer
B. Differential
46
‘Toe-in’ of tractors and even of other machines must be provided :
(i) For smooth steering control and longer front tyre life.
(ii) For smooth steering and longer back tyre life.
(iii) For proper ‘toe in’; the spacing of two front wheels should be 3 to 10 mm shorter
than that of the rear of the wheels.
(iv) For proper ‘toe in’; the spacing of two back wheels should be 3 to 10 mm shorter
than that of the front of the wheels.
Answer
A. (i) and (iii) are correct
47
Read carefully the following statements regarding draft of pull type implements and its
measurement :
(i) Draft is the component of pull in direction of travel.
(ii) To measure the draft, spring-type of dynamo meter is connected between tractor
drawbar and the implement hitch and is read directly.
(iii) Spring type dynamometer is suitable for accurate measurement of draft.
(iv) Strain-gage dynamometer is often used for measuring drawbar pull.
Choose the correct options :
Answer
D. (iii) is incorrect
48
Find out the horsepower developed by a pair of bullocks in pulling up a plough at a
forward speed of 3 kmph. The dynamometer indicates an average draft of 75 kgf :
Answer
B. 8.3 × 10–1 hp
49
The most common and practical method of calculation of depreciation which gives a
constant annual charge of depreciation throughout the life of the machine is :
Answer
D. Straight line method
50
High temperature (50 degree celsius) test in laboratory, belt test, track test in field are
carried out at testing stations to assess the likely performance in the field transport and
stationery job to be performed, is associated with :
Answer
D. Tractor test
168/2025 11 A
51
Bicycle ergo meter can be used for human energy measurement for different agricultural
operation under local environment condition through measurement of physiological
parameters corresponding to 'Mechanical work output' using the equation ____________;
where 'T1-T2' is the load on rear wheel in ‘kg’, 'D' is the diameter of rear wheel in 'm' and
'N' is the 'rpm' of the wheel.
πD(T 1 − T 2)N πD (T 1 − T 2)N
Answer
A. PS =
52
Value of CR
Answer
B. 1< CR ≤ 1000
53
Which of the following statement are correct with respect to Betz limit?
Statement 1 : Theoretical minimum power that may be captured by a wind
machine is 59.3% of incoming energy in the wind.
Statement 2 : The major factor influencing energy in the wind is its velocity
Statement 3 : Doubling the wind speed will increase the available power eight
times
Statement 4 : The equation for practical output power of a wind turbine is based on
betz limit.
Answer
C. Statement (2), (3) and (4) are correct
54
Average chemical composition of producer gas delivered from the gasifier is :
Answer
A. CO – 15 - 30%
55
Three stages or process involved in biogas formation are :
Answer
C. Hydrolysis acid formation, methane generation
56
The lower limit of available moisture range in a soil is called :
Answer
B. Permanent wilting point
57
_______________ equation of infiltration expresses the decrease of infiltration capacity
with time as an exponential decay.
Answer
D. Hortons equation
58
Drainage Density is related to the average length of overland flow by the equation :
Answer
A. L O = 1 2 Dd
59
The elevation difference between two points is accurately determined when instrument
cannot be set between the two points by :
Answer
D. Reciprocal Levelling
60
In Remote Sensing, the smallest size of a feature the sensor is able to identify is called
____________ resolution.
Answer
A. Spatial Resolution
61
The most efficient rectangular channel section, the condition is :
Answer
C. Depth of flow should be half the base width
62
Interceptor drain helps to control waterlogging by :
Answer
B. Preventing the subsoil water from reaching the area
63
The discharge per unit drawdown of a well is called :
Answer
B. Specific capacity
64
If the speed of the centrifugal pump is doubled, the power required will be increased by :
Answer
D. 8 times
65
In the hydraulic design of lateral or submain in Drip irrigation, as the number of outlets
increases, the value of outlet factor F
Answer
C. Decreases
66
The property that describes the micro structure of food and the rate and nature of
deformation under stress is :
Answer
D. Rheology
67
The relationship of Equilibrium RH with the moisture content of grain at a particular
temperature is expressed by a curve :
Answer
B. Grain Isotherm
68
The recommended air flow rate of LSU type dryer is :
Answer
Question Cancelled
69
The minimum temperature required for Low acid foods with ph > 4.6 for sterilization is
Answer
D. 121°C
70
The process of storing grains or seeds inside sealed compartments to avoid gas changes
with the environment is :
Answer
A. Hermetic storage
71
In which of the following sequences does the silica content of igneous rocks decrease?
Answer
A. Granite > Diorite > Basalt > Peridotite
72
In an anticline, the rock layers dip :
Answer
C. Away from the axis
73
The freezing method in shaft sinking is primarily used for :
Answer
B. Water-bearing unconsolidated strata
74
If the advance per round in a shaft sinking operation is 2.4 m and the duration of each
cycle is 6 hours, then the daily average sinking rate will be :
Answer
B. 9.6 m
75
The most commonly used method of ventilation during vertical shaft sinking is :
Answer
D. Mechanical ventilation by forcing fan
76
The required minimum clear over-run space between the detaching-hook attachment
point and the detaching bell or plate when the bucket is at the top landing shall be :
Answer
C. 3.6 m
77
How often must every electrical shot-firing apparatus be tested to ensure it is in safe
working order?
Answer
C. Once every three months
78
What is the maximum quantity of explosives that can be kept in a single case or
container?
Answer
B. 5 kg
79
Before connecting shot-firing cables, what must be ensured?
Answer
B. All surplus explosives are removed
80
The main purpose of a safety beam along the outer edge of a bench in opencast mine is :
Answer
B. To prevent trucks and other machineries from backing over
81
The bench height in opencast mine must be :
Answer
B. Below the digging height of the loading machine
82
Which of the following is not a reinforcement measure of pit slope stability?
Answer
D. None of these
83
Which of the following is not a laboratory sizing technique?
Answer
D. None of these
84
The size of protection pillars does not depend on the one of the factor :
Answer
C. Grade of coal
85
Blasting Gallery
Answer
A. More than 5.5 m thick
86
Which of the following is not a part of the permanent adjustment of the theodolite?
Answer
C. Levelling the instrument
87
Which mode of access must be available for Direct Traversing method of correlation
survey?
Answer
A. two adits/drifts
88
The correct expression for determining factor of safety for the pillar design for
development working in underground mine is :
Pillar Stress Pillar Strength
Answer
B. Pillar Strength Pillar Stress
Pillar Strength Pillar Stress
89
Which of following rock parameter is suggested for the design of the modern support
system for permanent and temporary galleries in the underground coal mine of India?
Answer
C. RMR (Rock Mass Rating)
90
The correct expression for determining the pillar stress using the tributary area method
for extensive area development, more than twice the depth and for regular size pillar is :
(Where : H= depth, e = extraction ratio, σ p = pillar stress in kg/cm2) :
0.25H 1−e
Answer
A. σP =
91
In a bi-cable aerial ropeway system, what is the primary function of the “track rope"?
Answer
B. uckets)
92
According to the Tirbutary Area Theory for pillar design, if a mine has square pillars of
width ‘Wp’ and square openings of width 'Wo', what is the total area of overburden
supported by a single pillar?
Answer
C. (WP + WO )2
93
What is the primary objective of “stowing” or "filling" in underground mining?
Answer
D. To fill the extracted void (goaf) to control strata movement, manage
subsidence
168/2025 17 A
94
A cyclone separator is a common air pollution control device. On what physical principle
does it primarily rely on to remove particulate matter from a gas stream?
Answer
A. Centrifugal force
95
If the pressure P required to move air through a mine is given by Atkinson’s Law (P = RQ²), how does the air power Wₐ relate to the airflow quantity Q?
Answer
C. Air Power is proportional to Q³
96
In mine climate monitoring, the Kata Thermometer
Answer
A. The “cooling power” of the air on a human body
97
Under the Mines Rules, 1955, the provision of a “Canteen” is mandatory for every mine
where the number of persons ordinarily employed is more than :
Answer
D. 250
98
Which government body in India is primarily responsible for enforcing the mining safety
legislation?
Answer
B. Directorate General of Mines Safety
99
As per the Mines Act, 1952, what is the minimum age for a person to be employed in any
part of a mine?
Answer
B. 18 years
100
As per The Metalliferous Mines Regulations (MMR), 1961, special precautions are
needed when approaching old workings which may be filled with water. Workings cannot
advance within ____________ of such a place without prior permission and the use of
advanced boreholes.
Answer
C. 60 meters
Discussion
Ask a doubt or share a tip.
No comments yet — start the discussion.