GATE 1999

The correct answer is a row of free sanding columns surrounding an area. The term “peristyle” in architecture indeed refers to a row of free-standing columns that surrounds an open space or courtyard. A peristyle is a characteristic architectural feature commonly found in ancient Greek and Roman architecture. It provides both structural support and aesthetic beauty to a building or space.

A peristyle typically consists of a series of columns (usually of a uniform style) placed at regular intervals around the perimeter of an open area. These columns support an entablature, which may include elements such as an architrave, frieze, and cornice. The space enclosed by the peristyle is often used as a courtyard or garden, and it serves various functional and decorative purposes.

The correct answer is star shaped urban form. Washington, D.C., is often cited as an example of a radial or star-shaped urban layout rather than a purely star-shaped urban form. In a radial layout, the city’s streets and avenues radiate outward from a central point, creating a spoke-like pattern. In the case of Washington, D.C., the central point is the U.S. Capitol building, and the city’s streets extend outward like spokes on a wheel.

The correct answer is Sodium vapour. SON lamps, short for “Sodium-Over-Neon” lamps, operate by creating a discharge within a chamber filled with sodium vapor. This discharge produces light when the sodium atoms are excited and then emit photons as they return to their ground state, resulting in the characteristic yellowish-orange light emitted by SON lamps.

The correct answer is Triangulation. Triangulation is a method of control survey that employs a network of triangles. This technique involves measuring the angles and sides of interconnected triangles to determine the relative positions of points on the Earth’s surface. Triangulation is a fundamental method in geodetic surveying and cartography, as it provides accurate and precise measurements for mapping and land surveying purposes.

The correct answer is a straight line moving over two other straight lines at an angle to one another..

A hyperbolic paraboloid can indeed be generated by a straight line moving over two other straight lines at an angle to one another. This mathematical surface is created through a process called ruled surface generation, where a straight line (the generator) moves along two distinct straight lines in space while maintaining a fixed angle between them. As the generator moves, it traces out the hyperbolic paraboloid shape. This type of surface is commonly found in architecture and engineering, often used for constructing structures like shell roofs and certain types of antennas due to its structural stability and unique geometric properties.

The correct answer is grasslands with drought-resistant trees. Savannas are indeed grasslands with drought-resistant trees. These ecosystems are characterized by a mixture of grasses and scattered trees or shrubs. The presence of drought-resistant trees, such as acacias or baobabs, distinguishes savannas from other types of grasslands. Savannas are typically found in regions with a pronounced dry season and provide important habitats for various wildlife species adapted to this environment. The combination of grasses and trees in savannas supports a diverse and dynamic ecosystem.

The correct answer is square of standard deviation of activity duration. The variability of project duration in PERT (Program Evaluation and Review Technique) analysis is indeed measured in terms of the square of the standard deviation of activity duration. PERT is a project management tool that helps assess the uncertainty or variability associated with project schedules. It takes into account three time estimates for each activity: optimistic (O), pessimistic (P), and most likely (M). The standard deviation is calculated from these estimates, and the variance (square of the standard deviation) represents the measure of variability or uncertainty in the activity duration. This variance is then used to calculate the variability or uncertainty in the overall project duration, allowing project managers to better plan and manage projects with inherent uncertainty.

The correct answer is dead city. The term “necropolis” indeed refers to a “city of the dead.” It is a word of Greek origin, where “necro” means “dead,” and “polis” means “city.” A necropolis is typically a large cemetery or burial ground containing tombs, mausoleums, or other structures where the deceased are interred. It is often associated with ancient civilizations and can be found in various cultures around the world, serving as a final resting place for the deceased.

The correct answer is Photoperiodism. The phenomenon of contorted growth of trees due to unequal irradiation of light on two sides is not known as “Photoperiodism.”

Photoperiodism is actually the response of an organism (typically plants) to the relative length of daylight and darkness. It involves processes like flowering, dormancy, and other seasonal activities triggered by changes in the duration of daylight.

The correct answer is 90 m³/hr .

The correct answer is 25 m.

The correct answer is internal rate of return. In a Build-Operate-Transfer (BOT) based project, while the internal rate of return (IRR) is an important evaluation criterion, it may not necessarily be the “most” important criterion in all cases. The choice of the most important evaluation criteria can vary depending on the specific project, its objectives, and the stakeholders involved.

The correct answer is 93 dBA.
The addition of decibel levels does not follow the same rules as simple arithmetic addition. Decibels (dB) are used to express the relative intensity or power of a sound or signal on a logarithmic scale. When you add two sound levels together, you need to use a formula to calculate the combined level.

The formula to calculate the combined sound level in dB when adding two sound sources together is:

L_total = 10 * log10(10^(L1/10) + 10^(L2/10))

The correct answer is m . The velocity head of a water supply line is indeed measured in terms of meters (m). Velocity head represents the energy associated with the flow velocity of water in the pipe and is typically used in fluid mechanics and hydraulics to analyze the flow characteristics of water in pipelines and other conduits. It is an important parameter for calculating pressure drops, designing water supply systems, and evaluating the performance of fluid systems.

The correct answer is same image complementary colour.