ISRO Draughtsman Civil Mock Test - 1 - Civil Engineering (CE) MCQ

Plants give oxygen during the daytime, much more than what they require, activity being maximum at mid-noon, due to the sun's effects on photosynthesis.

The relation between the degree of saturation (S), voids ratio (e), moisture content (W), and specific gravity (G) is given by,

e × S = W × G

The relation between the unit weight of saturated soil (γ­_Sat), specific gravity (G), unit weight of water (γ­_W), and voids ratio (e) is given by

And white lead for wooden surfaces.

It is essentially an instrument used for setting put right angles. In its simplest form, it is known as open cross-staff. It consists of two pairs of vertical slits providing lines of sight mutually at right angles.

So cross-staff is used for finding right angles.

(Re≥2000→ Flow is Turbulent )

• Pycnometer: A device used for measuring the specific gravity of liquids or fine-grained solids.


• Specific Gravity: Pycnometer helps measure the density of a substance compared to water. It involves weighing the pycnometer with and without the sample.


• Water Content: By knowing the weight of the wet and dry soil, the pycnometer can also help in determining the water content.


• Correct Answer: C: Water content and specific gravity.


 

For a UDL load applied on a simply supported beam, shear force

Here L=5m

The effective depth of the beam is 0.5m; hence critical section for shear occurs at a distance of 0.5m from the face of the column.

Therefore, design shear force.

Plywood is made from common timber. It is a type of engineered wood product manufactured from thin layers or "plies" of wood veneer that are glued together with adjacent layers having their wood grain rotated up to 90 degrees to one another. This cross-graining technique enhances the strength and stability of the plywood, making it suitable for various applications in construction, furniture-making, and other industries.

1. Tension failure in the plates

2. Shearing failure across one or more planes and shearing failure of the rivet

3. Bring failure between the plates and the rivets.

Hence the option D is correct.

- Cantilever 7

- Simply supported 20

- Continuous 26

* For spans above 10 m, the values may be multiplied by 10/span in meters, except for the cantilever, columns in which case deflection calculations should be made.

Hence the option B is correct.

Hence the option D is correct.

Hence the correct answer is option C.

A beveled closer is a brick that is cut in such a way that one end has half the width of a full brick while the other end retains the full width of a brick. This type of brick is often used in masonry to maintain the bond pattern at the corners of walls or openings, ensuring a more seamless and stable construction.

Hence the correct answer is option A.

Q = 2000 Kn

Z = 7m

σ_z = 3.53kN/m²

Hence the correct answer is option A.

Hence the correct answer is option C.

Hence the correct answer is option C.

• While Brickwork for thin partition walls is measured in a square meter.

• Brick walls are measured in square meter if the thickness of the wall is half brick or as a partition wall.

• For one or more than one thick brick wall, brickwork is measured in a cubic meter.

Hence, the correct option is (B)

Hence, the correct option is (A)

Hence, the correct option is (C)

• Due to the hygroscopic nature of cement, it quickly absorbs moisture from the atmosphere.

• This moisture or dampness is the main hazard for cement, making it hard like stone, and it converts it to a useless material not suitable for construction.

• Storage of cement requires more care as the strength of cement decreases with time.

• Storage of cement should be done so that it is not exposed to the atmosphere, which can be done by packing in air-tight bags.

• For storage guidelines, rules are mentioned in IS 4082:1996

Given

Void ratio, e = 0.5

Discharge velocity = 6 × 10^-7 m/s

Velocity distribution profile equation is written as:

It is a parabolic equation, So the velocity distribution is parabolic.

It converts nitrogen oxide, carbon monoxide & hydrocarbon like harmful products into carbon dioxide, water vapor & nitrogen gas like less harmful products.

Electrostatic precipitator: It is a device that removes suspended dust particles from a gas or exhaust by applying a high-voltage electrostatic charge and collecting the particles on charged plates.

Cyclone separators are separation devices (dry scrubbers) that use the principle of inertia to remove particulate matter from flue gases.

A bag filter is an air pollution control device and dust collector that removes particulates out of air or gas released from commercial processes or combustion for electricity generation.

As per IS 800:2007, in a bolted joint to ensure that the effect of bending stress is less than the specified value in the code, the grip length, L_g [/ngtr?] 5d

where d = diameter of the bolt

To take care of additional bending stress developed in the connection,

5d < L_g <  8d

If  L_g > 8d then the section should be redesigned.