1.
1 poise=
Explanation
The unit of viscosity, poise, is defined as the force required to move a surface of 1 cm2 at a velocity of 1 cm/sec, when there is a difference in velocity of 1 cm/sec between the layers of fluid. The unit dyne sec/cm2 represents the dynamic viscosity, which is the force required to move a surface of 1 cm2 at a velocity of 1 cm/sec, when there is a shearing stress of 1 dyne/cm2 between the layers of fluid. Since both units represent the same physical quantity, they are equivalent, hence 1 poise is equal to 1 dyne sec/cm2.
2.
Mercury is used in barometer because it has
Correct Answer
B. High density
Explanation
Mercury is used in barometers because it has a high density. Density is the measure of how much mass is contained in a given volume. In a barometer, the height of the mercury column indicates the atmospheric pressure. Since mercury is much denser than other liquids, it requires a shorter column to balance the atmospheric pressure. This makes it more practical for use in barometers compared to liquids with lower density.
3.
The upward force exerted on a body by fluid when the body is immersed in fluid is called
Correct Answer
buoyancy
Explanation
Buoyancy is the upward force exerted on a body by a fluid when the body is immersed in the fluid. This force is a result of the pressure difference between the top and bottom of the body, with the pressure being higher at the bottom. The buoyant force is equal to the weight of the fluid displaced by the body, according to Archimedes' principle. It is responsible for objects floating in water or other fluids, as the buoyant force counteracts the weight of the object, allowing it to stay afloat.
4.
Gauge pressure in flow system can be measured by
Correct Answer
A. Manometer
Explanation
A manometer is a device used to measure the pressure of a fluid in a closed system. It consists of a U-shaped tube filled with a liquid, such as mercury or water, and connected to the system. The difference in fluid levels in the two arms of the tube indicates the pressure difference between the system and the atmosphere. Therefore, a manometer is an appropriate instrument to measure gauge pressure in a flow system. Vacuum gauge measures pressure below atmospheric pressure, pitot tube measures the velocity of fluid flow, and anemometer measures the speed of airflow.
5.
The dimension of dynamic viscosity is
Correct Answer
A. MLT
Explanation
The dimension of dynamic viscosity is MLT, which stands for mass per unit length per unit time. This dimension represents the resistance of a fluid to flow, and is measured in units such as pascal-seconds (PaÂ·s) or poise (P). It is derived from the fundamental dimensions of mass (M), length (L), and time (T).
6.
1 inch= cm
Correct Answer
2.54
Explanation
The given answer, 2.54, is the conversion factor used to convert inches to centimeters. It represents the number of centimeters in one inch. Therefore, to convert inches to centimeters, you would multiply the number of inches by 2.54.
7.
True meridians
Correct Answer
B. Converge at a point called pole
Explanation
True meridians converge at a point called pole. Meridians are imaginary lines that run from the North Pole to the South Pole on the Earth's surface. They are used to measure longitude. As you move towards the poles, the meridians come closer together until they meet at a single point, which is the pole. Therefore, the correct answer is that true meridians converge at a point called pole.
8.
Rise and fall methods of levelling provides a complete check on
Correct Answer
D. All of these
Explanation
The rise and fall methods of leveling provide a complete check on all of these - backsight, foresight, and intermediate readings. In this method, the instrument is set up at a known height and readings are taken on a leveling staff at various points. The backsight reading is taken on a point of known elevation, the foresight reading is taken on a point where the elevation is to be determined, and the intermediate readings are taken on points in between. By comparing these readings, any errors or mistakes in the leveling process can be identified and corrected.
9.
Line joining points of zero declination are called
Correct Answer
Agonic lines
Explanation
Agonic lines are the lines that connect points on the Earth's surface with zero declination. Declination refers to the angular difference between true north and magnetic north. Zero declination means that the magnetic north and true north coincide at those points. Therefore, the correct answer is "Agonic lines."
10.
When Shear Force is Zero.the Bending Moment is
Correct Answer
Maximum
Explanation
When the shear force is zero, it means that there is no external force acting on the object at that point. In such cases, the bending moment is at its maximum. This is because the absence of shear force allows for the maximum transfer of moment or torque, resulting in a maximum bending moment.
11.
Quartzite is ----------- rock
Correct Answer
A. Silicious
Explanation
Quartzite is a type of rock that is primarily composed of quartz grains. It is formed through the metamorphism of sandstone, where the intense heat and pressure cause the grains to recrystallize and fuse together. Quartzite is known for its high silica content, which gives it its characteristic hardness and durability. Therefore, the correct answer is "silicious," indicating that quartzite is a rock rich in silica.
12.
In which of the following, the limbs are equal in lenth and dip equally in opposite direction
Correct Answer
B. Normal fold
Explanation
A normal fold is characterized by limbs that are equal in length and dip equally in opposite directions. This means that the fold has a symmetrical shape, with both sides of the fold mirroring each other. In contrast, an isoclinal fold is characterized by limbs that are equal in length but do not dip equally in opposite directions. An asymmetric fold is characterized by limbs that are unequal in length, while a box fold is characterized by limbs that are parallel to each other and do not dip in any direction. Therefore, the correct answer is normal fold.
13.
The rocks formed by gradual deposition are called
Correct Answer
sedimentary rocks,sedimentary,sedimentary rock
Explanation
The rocks formed by gradual deposition of sediment particles over time are known as sedimentary rocks. These rocks are formed through processes such as weathering, erosion, and deposition. Sedimentary rocks are characterized by their layered structure and contain fossils and other evidence of past environments. They are one of the three main types of rocks, along with igneous and metamorphic rocks.
14.
Line perpendicular to H.P and parallel to V.P. then the top view is
Correct Answer
point
15.
A badly mixed cement concrete results in
Correct Answer
C. Honey combing
Explanation
When cement concrete is poorly mixed, it can result in honeycombing. Honeycombing refers to the presence of voids or gaps in the concrete, which can weaken its overall structure. This can occur when the cement and aggregates are not properly mixed, leading to poor compaction and the formation of air pockets. Honeycombing can negatively impact the durability and strength of the concrete, making it more susceptible to damage and deterioration over time.
16.
The order of differential equation is (d^{3}y/dx^{3})^{2}+(d^{2}y/dx^{2})^{4}+(dy/dx)=0
Correct Answer
3
Explanation
The order of a differential equation is determined by the highest order derivative present in the equation. In this given equation, the highest order derivative is (d3y/dx3), which means the order of the differential equation is 3.
17.
Find the number in series 2,4,8,14,22,-
Correct Answer
10
Explanation
The given series starts with 2 and each subsequent term is obtained by adding 2 to the previous term, then adding 4, then adding 6, and so on. However, the pattern breaks after the term 22. Instead of adding 8 to 22, the next term is 10. Therefore, the missing number in the series is 10.
18.
The FSI stands for
Correct Answer
A. Floor Space Index
Explanation
The correct answer is Floor Space Index. FSI is a measure used in urban planning and construction regulations to determine the maximum amount of floor area that can be built on a given plot of land. It is calculated by dividing the total covered area on all floors by the area of the plot. FSI helps in regulating the density and intensity of development in urban areas, ensuring proper land utilization and preventing overcrowding.
19.
Identify the instrument---
Correct Answer
Theodolite
Explanation
A theodolite is a precision instrument used in surveying and engineering to measure angles in both horizontal and vertical planes. It consists of a telescope mounted on a base that can be rotated horizontally and vertically. Theodolites are commonly used to measure angles for mapping, construction, and land surveying purposes. They provide accurate and precise measurements, making them an essential tool in various industries.
20.
In the shown figure,which of the following pattern 1,2,3,4,5 fills the F box
Correct Answer
A. 1
Explanation
Based on the given pattern, the number in the F box is the first number in the sequence. Therefore, the number 1 fills the F box.