Coefficient of permeability is obtained from the equation
when $a$ = sectional area
$t$ = time
$L$ = Soil specimen length
$A$ = Cross sectional area
$h_0$ = initial reading
$h_1$ = final reading
In a falling head permeability test, the coefficient of permeability is given by the formula based on the ratio of head drop over time, marked as option (D) in the key: $K = 2.3 \frac{aL}{AL} \log_{10} \frac{h_0}{h_1}$.
Q2mcq1 mark
Non leaky artesian formula is given by
$W(u)$ = well function, dimensionless
Where $S$ = Draw down in the observation well
$s$ = Storage coefficients at radius ($r$)
$Q$ = Pumping rate
$T$ = Transmissibility coefficient
$t$ = time after pumping started
$r$ = Distance of the observation well from the pumping well
$S = \frac{Wu 4\pi T}{Q}$ and $u = \frac{4Tt}{r^2 s}$
c.
$S = \frac{Q}{Wu} 4\pi T$ and $u = \frac{r^2}{4Tts}$
d.
$S = \frac{QT}{Wu 4\pi}$ and $u = \frac{r^2 s}{4Tts}$
Step-by-Step AI Explanation
Verified Method
According to Theis' non-equilibrium formula for non-leaky artesian aquifers, drawdown $s$ (or $S$) and $u$ are related by well function $W(u)$ such that $S = \frac{Q}{4\pi T} W(u)$ and $u = \frac{r^2 S}{4Tt}$, marked as choice (A).
Q3mcq1 mark
The ground water flow is calculated as
a.
Cross sectional area of aquifer $\times$ Slope of ground water table $\times$ permeability of the aquifer
Correct Answer
b.
Cross sectional area of aquifer $\times$ slope of ground water table $\times$ transmissibility of the aquifer
c.
Width of aquifer $\times$ slope of piezometer surface $\times$ transmissibility of aquifer
d.
Width of aquifer $\times$ slope of ground water table $\times$ permeability of aquifer
Step-by-Step AI Explanation
Verified Method
According to Darcy's Law, groundwater discharge $Q = K \cdot i \cdot A$, which corresponds to Permeability of the aquifer $\times$ Slope of the ground water table (hydraulic gradient) $\times$ Cross-sectional area of the aquifer.
Q4mcq1 mark
Ground water flow
Where $K$ = coefficient permeability
$i$ = hydraulic gradient
$A$ = Gross sectional area of the aquifer
$W$ = Width of the aquifer
$b$ = Saturated thickness of the aquifer
$T$ = Transmissibility of the aquifer
a.
$Q = K W b \frac{\Delta h}{L}$
Correct Answer
b.
$Q = \frac{K W b L}{\Delta h}$
c.
$Q = \frac{W b L}{K \Delta h}$
d.
$Q = \frac{W b \Delta h}{K L}$
Step-by-Step AI Explanation
Verified Method
By Darcy's Law, $Q = K \cdot i \cdot A$. Here cross-sectional area $A = W \times b$ and hydraulic gradient $i = \frac{\Delta h}{L}$. Thus, $Q = K W b \frac{\Delta h}{L}$.
Q5mcq1 mark
The specific capacity of a well is confined aquifer under equilibrium conditions and within the working limits of drawdown
a.
can be taken as constant
b.
decreases as the drawdown increases
Correct Answer
c.
increases as the drawdown increases
d.
increases or decreases depending upon the size of the well
Step-by-Step AI Explanation
Verified Method
Because of well losses that increase quadratically with discharge ($s_w = BQ + CQ^2$), the specific capacity ($Q/s_w$) decreases as drawdown or discharge increases.
Q6mcq1 mark
Which statement is wrong in the development process of well
(i) Increasing the specific capacity of the well
(ii) Preventing sand flowing
(iii) Maximum well life
(iv) Increasing the porosity of well
a.
(iv)
Correct Answer
b.
(ii)
c.
(i) and (ii)
d.
(ii) and (iii)
Step-by-Step AI Explanation
Verified Method
Well development aims to remove fines, increase permeability around the screen, stabilize the formation, prevent sand entry, and maximize well life and specific capacity. 'Increasing the porosity of well' is an incorrect/inappropriate statement.
Q7mcq1 mark
Which types of boring is most suitable for unconsolidated strata and for depth over 163m
a.
Hydraulic Rotary method
Correct Answer
b.
Cable Tool method
c.
Wash boring method
d.
Water jet boring method
Step-by-Step AI Explanation
Verified Method
The hydraulic rotary method is fast, efficient, and best suited for unconsolidated formations and deep boreholes exceeding 150–160 m depth.
Q8mcq1 mark
The average annual rainfall in India is
a.
189 cm
b.
319 cm
c.
89 cm
d.
118 cm
Correct Answer
Step-by-Step AI Explanation
Verified Method
The average annual rainfall of India is approximately 118 cm to 119 cm (1180–1190 mm).
Q9mcq1 mark
A self - recording rain - gauge
a.
Records by hourly depth of rain
b.
Records the rainfall intensity
c.
Records the onset and cessation of rainfall
d.
Records the cumulative depth of rainfall
Correct Answer
Step-by-Step AI Explanation
Verified Method
A self-recording rain gauge (like the natural siphon or float type) records mass curve of rainfall, which gives the cumulative depth of rainfall versus time.
Q10mcq1 mark
Lithosphere is the Environment which is
a.
Below the Hydrosphere
Correct Answer
b.
Above the Hydrosphere
c.
Below the Atmosphere
d.
Above the Atmosphere
Step-by-Step AI Explanation
Verified Method
The lithosphere represents the solid crust and uppermost mantle of the Earth, which underlies oceanic and surface water bodies (hydrosphere).
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In the Barometer, difference in elevation between the two stations may be obtained by the formula where
$H$ : the difference in elevation in m between the two stations
$h_1$ = the barometer reading in cm @ the lower station
$h_2$ = the barometer reading in cm @ the higher station
$T_1$ = the temperature of the air in degrees centigrade @ the lower station
$T_2$ = the temperature of the air in degree centigrade @ the higher station
Identify the correct representation of depreciation of machine ($D$) in hours.
where,
$C$ - Initial cost of machinery
$J$ - Salvage value
$L$ - Life of machinery (years)
$H$ - Working hours of machine (h/year)
a.
$D = C + J / L \times H$
b.
$D = C - J / L \times H$
c.
$D = L \times H / (C - J)$
d.
$D = C - J / L + H$
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The rate of use of a particular raw material from stores is 20 units per year. The cost of placing and receiving an order is Rs. 40. The cost of each unit is Rs. 100. The cost of carrying inventory in percent per year is 0.16 and it depends upon the average stock. Determine the economic order quantity. If the lead time is 3 month, calculate the reorder point.
a.
10 and 5 units
b.
5 and 10 units
c.
15 and 5 units
d.
5 and 15 units
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Consider the following operations involved in forging a hexagonal bolt from a round bar stock, whose diameter is equal to the bolt diameters. Find the correct sequence of the operations
a.
Up setting - Swaging - Cambering - Flattening
b.
Up setting - Flattening - Swaging - Cambering
c.
Swaging - Up setting - Flattening - Cambering
d.
Flattening - Up setting - Swaging - Cambering
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Match the following:
(a) Neutral flame — 1. Application are similar to electro gas welding
(b) Oxidizing flame — 2. Stick welding
(c) Carburizing flame — 3. Small and narrow
(d) Shielded metal arc welding — 4. Inner cone of 3040-3300°C
(e) Electro slag welding — 5. Blue envelope
a.
4 3 5 2 1
b.
3 4 5 2 1
c.
5 2 4 3 1
d.
3 4 5 1 2
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A Crude Oil of kinematic viscosity 0.4 stoke is flowing through a pipe of diameter 300 mm at the rate at 300 litre per second. Find the velocity of flow.
a.
4.14 m/s
b.
4.24 m/s
c.
4.34 m/s
d.
4.44 m/s
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Which among the following is one of the widely practised method between production and marketing of perishable agricultural commodities towards extended shelf life?
a.
Cold storage
b.
Sterilization
c.
Pasteurization
d.
Canning
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Which of the following statements are true about evaporators?
Statement I : Open pan evaporators have poor evaporation capacity.
Statement II : Pan evaporators have low surface/volume ratio.
a.
I and II
b.
I
c.
II
d.
None of the statements are true
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Vacuum packaging used to prevent _______ in the food products.
(i) lipid oxidation
(ii) loss of vitamins
(iii) loss of pigments
(iv) oxidative browning
a.
(i), (iii) only
b.
(i), (iv) only
c.
(i), (ii), (iii) and (iv)
d.
(ii), (iii) only
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Match the types of Dryer used for various food and foods by-products.
(a) Fruits and vegetables — 1. Spray dryer
(b) Instant coffee and tea — 2. Compartment and tunnel tray dryer
(c) Breakfast cereals — 3. Film drum
(d) Predigested infant foods — 4. Conveyor band
a.
(a)-2, (b)-1, (c)-4, (d)-3
b.
(a)-3, (b)-4, (c)-1, (d)-2
c.
(a)-2, (b)-4, (c)-1, (d)-3
d.
(a)-1, (b)-4, (c)-3, (d)-2
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Facts about radiation heat transfer
(i) Electromagnetic radiation wavelength is $10^{-7}$ to $10^{-4}\text{ m}$
(ii) Intensity of radiation depends on temperature of the source
(iii) Does not require any material medium
(iv) Transport energy in the form of waves
a.
(i), (iv) only true
b.
(ii), (iii) and (iv) only true
c.
(i), (ii), (iii) and (iv) are true
d.
Only (i), (ii) and (iii) are true
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Which statement is true about thermal conductivity?
(I) It varies with temperature
(II) It is pressure dependent in case of gases
(III) SI unit is w/mk
a.
I, II and III
b.
Only I, II
c.
Only II and III
d.
Only I and III
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Which of the statement is true about heat exchangers?
(I) Fouling reduces efficiency of heat exchange
(II) Burnt pulp, denatured protein cause fouling
(III) Fouling cannot be eliminated
a.
I and II
b.
II and III
c.
I and III
d.
I, II and III
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In ________ system of surface drainage the laterals are constructed parallel to each other and they are connected to main drain when the land is perfectly level.
a.
Regular
b.
Random
c.
Terrace
d.
Bedding
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The electronic moisture meter developed by Central Plantation Crop Research Institute, Kasaragod can read moisture content of Copra from _____ to _____ %.
a.
5 to 40
b.
0 to 100
c.
0 to 25
d.
5 to 75
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Which of the following properties are related with raw rice production?
(i) More gruel loss
(ii) Quick cooking
(iii) Less oil content in bran
(iv) More prone to infect infestation
a.
(i) and (ii)
b.
(i), (ii) and (iii)
c.
(i), (iii) and (iv)
d.
(i), (ii), (iii) and (iv)
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The separation of cleaned product into various quality fractions that may be defined on the basis of size, shape, density texture and colour is called as
a.
Sorting
b.
Grading
c.
Cleaning
d.
Scalping
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Which of the following statements are true about the moisture content of grains?
(i) Dry basis moisture content is higher than wet basis moisture content
(ii) Direct methods of moisture determination is more precise than in-direct methods
(iii) Infra red method of moisture determination is classified under in-direct method
a.
(i) only
b.
(i) and (ii)
c.
(i) and (iii)
d.
(ii) and (iii)
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Calculate the vertical height of a watt governor when it rotates at 60 RPM. Also find the change in vertical height when its speed increases to 61 RPM.
a.
6 mm
b.
8 mm
c.
9.5 mm
d.
12 mm
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Match the following thermal processes:
List I
(a) Torrefaction
(b) Pyrolysis
(c) Gasification
(d) Combustion
List II
1. excess amount of oxydant
2. incomplete amounts of oxydant
3. absence of oxydant
4. pretreatment process
a.
(a)-4, (b)-3, (c)-2, (d)-1
b.
(a)-3, (b)-4, (c)-1, (d)-2
c.
(a)-2, (b)-1, (c)-4, (d)-3
d.
(a)-1, (b)-2, (c)-3, (d)-4
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Determine the efficiency of converting a tonne of wood with a heating value of 21 MJ/kg to biomass of heating value 35 MJ/kg when the biomass yield is 50%.
a.
83.3%
b.
95%
c.
60%
d.
66.67%
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In a solar flat plate collector, the top loss coefficient can be determined by considering ________ and ________ losses from the absorber plate in the ________ direction.
a.
Convection, radiation and upward
b.
Conduction, radiation, upward
c.
Convection, radiation, downward
d.
Conduction, radiation, downward
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The concentration ratio of a cylindrical parabolic solar concentrator of 2.5 m width and 9 m length when the outside diameter of the absorber tube is 6.5 cm is about
a.
12
b.
24
c.
36
d.
06
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