Daily Quiz #4 UPSC Prelims Marathon – July 4, 2019

Explanation: The space research activities were initiated in our country during the early 1960’s, when applications using satellites were in experimental stages even in the United States. With the live transmission of Tokyo Olympic Games across the Pacific by the American Satellite ‘Syncom-3’ demonstrating the power of communication satellites, Dr. Vikram Sarabhai, the founding father of Indian space programme, quickly recognized the benefits of space technologies for India.

Explanation: NHSRCL is implementing the project of high speed train corridor between Ahmedabad and Mumbai. The proposed corridor lies in Western Railway zone. It shall start from Bandra Kurla Complex in Mumbai and will end near Sabarmati Railway Station in Ahmedabad. The High Speed Corridor of Mumbai-Ahmedabad has been proposed with 12 Stations i.e. Mumbai, Thane, Virar, Boisar, Vapi, Bilimora, Surat, Bharuch, Vadodara, Anand/Nadia, Ahmedabad and Sabarmati, all near major traffic points.
High-speed rail is a type of rail transport that operates significantly faster than traditional rail traffic, using an integrated system of specialized rolling stock and dedicated tracks. The first such system began operations in Japan in 1964 and was widely known as the bullet train. High-speed trains normally operate on standard gauge tracks of continuously welded rail on grade-separated right-of-way that incorporates a large turning radius in its design.

Explanation: RUCO is Repurpose Used Cooking Oil. It is an initiative by FSSAI, with an aim to enable collection and conversion of used cooking oil to bio-diesel.
The consumption of Used Cooking Oil(UCO) poses adverse health effects. During frying, several properties of oil are altered, Total Polar Compounds(TPC) are formed on repeated frying. The toxicity of these compounds is associated with several diseases such as hypertension, atherosclerosis, Alzheimer’s disease, liver diseases. Therefore, it is essential to monitor the quality of vegetable oils during frying. In order to safeguard consumer health, FSSAI has fixed a limit for Total Polar Compounds at 25 percent beyond which the vegetable oil shall not be used. From 1st July, 2018 onwards, all Food Business Operators (FBOs) are required to monitor the quality of oil during frying by complying with the said regulations. Repurpose Used Cooking Oil (RUCO) is an ecosystem that will enable the collection and conversion of UCO to biodiesel.

Explanation: ISRO’s PSLV C43 launched India’s first Hyperspectral Imaging Satellite (HysIS). It is an earth observation satellite built around ISRO’s Mini Satellite-2 (IMS-2) bus. It is placed into 636 km polar sun synchronous orbit. The primary goal of HysIS is to study the earth’s surface in the visible, near infrared and shortwave infrared regions of the electromagnetic spectrum.
Types of Orbits:

Geostationary orbit
As satellites in geostationary orbit continuously cover a large portion of the Earth, this makes it an ideal orbit for telecommunications or for monitoring continent-wide weather patterns and environmental conditions. It also decreases costs as ground stations do not need to track the satellite.
Geostationary transfer orbit
This is an elliptical Earth orbit used to transfer a spacecraft from a low altitude orbit or flight trajectory to geostationary orbit. The apogee is at 36 000 km. When a spacecraft reaches this point, its apogee kick motor is fired to inject it into geostationary orbit.
Low Earth orbits
A low Earth orbit is normally at an altitude of less than 1000 km and could be as low as 160 km above the Earth. Satellites in this circular orbit travel at a speed of around 7.8 km per second. At this speed, a satellite takes approximately 90 minutes to circle the Earth.
In general, these orbits are used for remote sensing, military purposes and for human spaceflight as they offer close proximity to the Earth’s surface for imaging and the short orbital periods allow for rapid revisits. The International Space Station is in low Earth orbit.
Polar orbits
As the name suggests, polar orbits pass over the Earth’s polar regions from north to south. The orbital track of the satellite does not have to cross the poles exactly for an orbit to be called polar, an orbit which passes within 20 to 30 degrees of the poles is still classed as a polar orbit.
These orbits mainly take place at low altitudes of between 200 to 1000 km. Satellites in polar orbit look down on the Earth’s entire surface and can pass over the North and South Poles several times a day.
Sun synchronous orbits
These are polar orbits which are synchronous with the Sun. A satellite in a sun synchronous orbit would usually be at an altitude of between 600 to 800 km. Generally these orbits are used for Earth observation, solar study, weather forecasting and reconnaissance, as ground observation is improved if the surface is always illuminated by the Sun at the same angle when viewed from the satellite.

Explanation: Passive Immunity is when readymade or pre formed antibodies are directly injected into body to obtain temporary immunity.
Active Immunity is the one developed by person’s own body either in form of antibodies or activated lymphocytes in response to exposure to living or dead microbes or other antigens.
So both statements in question are wrong.