← JE Departmental
Past Questions
Which of the following is/are the factor(s) affecting water consumption?
A)
Size of the city
B)
Characteristics of population
C)
Efficiency of water works management
D)
All of these
Water consumption (or water demand) in a community is influenced by several socio-economic and technical factors.
1. Size of the city: Larger cities often have different consumption patterns compared to small towns. While per capita consumption might vary, the overall scale of infrastructure and the presence of large industrial hubs in bigger cities significantly affect total water demand.
2. Characteristics of population: This includes the standard of living, habits of the people, climate of the region, and the socio-economic status. For example, high-income areas may have higher water usage due to luxuries like lawns and swimming pools.
3. Efficiency of water works management: The quality of the distribution system plays a huge role. Poor management leads to high 'non-revenue water' (water lost through leakages or theft), which increases the apparent consumption/demand from the source.
Since all three factors (a, b, and c) directly or indirectly influence the amount of water consumed or required by a population, the correct answer is 'All of these'.
Which of the following is among the harmful ingredients in Brick earth?
A)
Iron pyrites
B)
Alumina
C)
Oxide of iron
D)
Silica
Brick earth is composed of several constituents, some of which are essential for the brick-making process and some of which are harmful.
1. **Iron Pyrites (Correct):** These are harmful ingredients. When present in brick earth, they cause the bricks to disintegrate over time due to the formation of expansive salts or cause 'efflorescence' and structural instability after burning.
2. **Alumina (Incorrect):** This is a primary constituent of brick earth. It imparts plasticity to the clay, allowing it to be molded into the desired shape. However, an excess of alumina can cause the bricks to crack during drying.
3. **Oxide of Iron (Incorrect):** This is a beneficial constituent. It acts as a flux to fuse the particles and gives the bricks their characteristic red color.
4. **Silica (Incorrect):** This is the main constituent of brick earth. It prevents shrinkage, cracking, and warping during the drying and burning process.
Sanitary sewers are designed to carry
A)
Sanitary sewage
B)
Industrial waste produced by community
C)
Only such ground, surface and storm water as may enter through poor joints, around manhole covers and through other deficiencies
D)
All of these
Sanitary sewers are intended to carry sanitary sewage, i.e., domestic wastewater from toilets, baths, kitchens, and similar sources. They are not designed to carry industrial waste unless specifically treated and admitted under special conditions, and they do not normally carry storm water. Option (c) describes infiltration/inflow entering sewers through defects, which is not the intended design flow. Therefore, the correct answer is (a) Sanitary sewage.
If Ø denotes the diameter of steel reinforcement, as a rough rule, full anchorage of steel stressed to ultimate strength, for tension, may be taken as
A)
30 Ø
B)
32 Ø
C)
40 Ø
D)
41 Ø
In Reinforced Concrete Design, 'anchorage length' (or development length) is the minimum length of an embedded bar required to develop the full design strength of the bar through bond stress between the steel and the concrete. While the precise calculation depends on the grade of concrete, the grade of steel, and the type of bond (plain or deformed), a widely accepted 'rough rule' or empirical thumb rule used in structural engineering for steel stressed to its ultimate strength in tension is approximately 40 times the diameter of the bar (40Ø). This ensures that the bar will yield or reach its ultimate strength before it pulls out of the concrete. Options a, b, and d do not align with this standard empirical approximation for full anchorage at ultimate stress.
The disposal of sewage by discharging it into water courses such as streams is called
A)
Primary treatment
B)
Secondary treatment
C)
Land treatment
D)
Dilution
Step-by-step reasoning: 1. The question asks for the term used when sewage is discharged directly into water courses like streams. 2. 'Dilution' is the process of reducing the concentration of pollutants by mixing the sewage with a larger volume of water (the receiving stream). Historically, this was a common method of sewage disposal based on the principle that 'the solution to pollution is dilution.' 3. 'Primary treatment' (Option a) refers to the physical removal of solids (screening and sedimentation). 4. 'Secondary treatment' (Option b) refers to biological degradation of organic matter using microorganisms. 5. 'Land treatment' (Option c) involves applying sewage to land for filtration and absorption (e.g., sewage farming or septic tanks). Therefore, discharging raw or partially treated sewage into a stream to lower its pollutant concentration is termed dilution.
The wall thickness of hollow brick is generally
A)
15mm to 20mm
B)
18mm to 22mm
C)
20mm to 25mm
D)
22mm to 26mm
Hollow bricks are designed to reduce the dead load of the structure and provide better thermal and acoustic insulation compared to solid bricks. To ensure that the brick maintains sufficient structural integrity and compressive strength while remaining lightweight, the thickness of the walls (the shells) of the hollow brick is typically maintained between 20mm and 25mm. If the walls are thinner than 20mm, the brick becomes too fragile and prone to cracking during handling or under load. If they are significantly thicker, the benefit of weight reduction and insulation is diminished. Therefore, the standard engineering range for the wall thickness of a hollow brick is 20mm to 25mm.
The weight of 16mm Reinforcement bars of Kg/Rm is:
A)
1.58
B)
1.85
C)
1.78
The unit weight of a steel bar per running meter is given by the standard formula: Weight (kg/m) = d^2 / 162, where d is the diameter in mm. For a 16 mm bar: 16^2 / 162 = 256 / 162 ≈ 1.58 kg/m. However, among the given options, 1.58 corresponds to option a, not c. So the correct numerical answer is 1.58 kg/Rm, which means option a is correct. The other options are incorrect because 1.78 kg/m and 1.85 kg/m do not match the standard calculation for a 16 mm bar.
In a rectangle having sides ‘L’ and ‘B’, the Area is given by:
A)
L + B
B)
L x B
C)
2(LxB)
Based on established principles in Quantitative Aptitude, the correct and most appropriate choice is '2(LxB)' (Option C).
Plinth area for Type-I Quarter is:
A)
34.00M2
B)
37.00M2
C)
33.00M2
Based on established principles in Civil Engineering, the correct and most appropriate choice is '33.00M2' (Option C).
C-Wrench Pipe lifter is associated with:
A)
Pipeline
B)
Handpump Tube well
C)
Pumping System
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'Pipeline' (Option A).
If a population of a Town is 5 lakhs and average water consumption is 70 Lpcd, then capacity of the reservoir should be:
A)
80 mld.
B)
70 mld.
C)
35 mld.
Based on established principles in the relevant subject area, the correct and most appropriate choice is '80 mld.' (Option A).
The recommended per capita water supply levels for Villages are:
A)
55 Lpcd
B)
43Lpcd
C)
45Lpcd
Based on established principles in the relevant subject area, the correct and most appropriate choice is '55 Lpcd' (Option A).
True or False: Hardness of Water cause corrosion & incrustation of pipes & plumbing fixtures.
F)
False
T)
True
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'nan' (Option B).
The value acceleration due to gravity in MKS unit is:
A)
9.91
B)
9.81
C)
10
Based on established principles in the relevant subject area, the correct and most appropriate choice is '9.81' (Option B).
Manning formula is use to determine:
A)
flow in open channel
B)
Head loss due to friction is pies
C)
Head loss in open channel
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'flow in open channel' (Option A).
The number of standard modular bricks (IS) required to make 1m3 of masonry is:
A)
500
B)
495
C)
540
Based on established principles in Civil Engineering, the correct and most appropriate choice is '540' (Option C).
A layer of dry bricks put below the foundation concrete, in the case of soft soils, is called:
A)
Shoring
B)
D.P.C.
C)
Soling
Based on established principles in Civil Engineering, the correct and most appropriate choice is 'Soling' (Option C).
Seasoning of Timber is the process of -
A)
Burning of Timber
B)
Adding Preservations
C)
Removing Water
D)
Painting Timber
Based on established principles in Civil Engineering, the correct and most appropriate choice is 'Painting Timber' (Option D).
1 (One) megawatt is:
A)
1000 Watts
B)
1000Kilowatt
C)
100 Kilowatt
1 megawatt (MW) = 10^6 watts. Since 1 kilowatt (kW) = 10^3 watts, 1 MW = 10^6 / 10^3 = 10^3 kW = 1000 kilowatts. So option b is correct. Option c (100 kilowatt) is too small by a factor of 10, and option a (1000 watts) is far too small because 1000 watts = 1 kilowatt, not 1 megawatt.
The Mass per unit Volume of Water is:
A)
1000.00Kg./m3
B)
100Kg./m3
C)
10Kg./m3
The mass per unit volume of water is its density. For pure water, density is approximately 1000 kg/m³ (more precisely about 998 kg/m³ at room temperature, often taken as 1000 kg/m³ in exams). Therefore, option (a) is correct. Option (b) 100 kg/m³ is far too low for water, and option (c) 10 kg/m³ is even lower and not applicable to water.
True or False: The consumer shall be responsible for the safe custody against loss, damage or tempering of water meter.
F)
False
T)
True
True. In water-supply rules and standard utility practice, the consumer is responsible for the safe custody of the water meter installed on the premises, including protection against loss, damage, or tampering. This is because the meter is used to record consumption and must be kept intact and accessible for accurate billing and inspection. The False option is incorrect because it contradicts this standard responsibility placed on the consumer.
Cement Concrete 1 : 2 : 4 mix approximates to which grade of concrete:
A)
M-25
B)
M-30
C)
M-15
Based on established principles in Civil Engineering, the correct and most appropriate choice is 'M-15' (Option C).
The weight of 12mm Reinforcement bars of Kg/Rm is:
A)
0.87
B)
0.84
C)
0.89
Based on established principles in Civil Engineering, the correct and most appropriate choice is '0.89' (Option C).
Contour lines:
A)
Close somewhere
B)
Cross each other
C)
are uniformly spaced
Based on established principles in Civil Engineering, the correct and most appropriate choice is 'are uniformly spaced' (Option C).
Water is freezing at:
A)
100C
B)
40C
C)
00C
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is '40C' (Option B).