science & tech MCQ section 7 Practice Questions Answers Test with Solutions & More Shortcuts
science & tech PRACTICE TEST [7 - EXERCISES]
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science & tech MCQ section 7
Question : 36
Which of the following nuclear power plants (planned or active) are correctly matched with the state where they are located?
- Kakrapar Gujarat
- Gorakhpur Rajasthan
- Mithivirdi Maharashtra
a) 2 only
b) 1 and 2 only
c) 1 only
d) 1 and 3 only
Answer »Answer: (c)
Gorakhpur nuclear power plant has been proposed to be constructed at Fatehabad (Haryana), but has met with continuous protest from the farmers. Recently, Ministry of Environment, Forests & Climate Change has given coastal regulatory zone approval to Mithivirdi Nuclear Power Plant, Bhavnagar (Gujarat).
Question : 37
Consider the following:
- Bluetooth device
- Cordless phone
- Microwave oven
- Wi-Fi device
a) 3 and 4
b) 1, 2 and 4
c) 1 and 2
d) 1, 2, 3 and 4
Answer »Answer: (d)
Microwaves are electromagnetic waves with wavelengths ranging from as long as one meter to as short as one millimetre, or equivalently, with frequencies between 300 MHz (0.3 GHz) and 300 GHz. A microwave oven passes (nonionizing microwave radiation (at a frequency near 2.45 GHz) through food, causing dielectric heating by absorption of energy in the water, fats and sugar contained in the food.
Bluetooth and Wi-Fi have many applications: setting up networks, printing, or transferring files. They also work in the given frequency range. All cordless sold in the US use the 1.9 GHz or 2.4-GHz bands.
Question : 38
Which one of the following was discovered first in the chromosphere of the sun?
a) Helium
b) Krypton
c) Neon
d) Xenon
Answer »Answer: (a)
The chromosphere (literally, “sphere of colour”) is the second of the three main layers in the Sun’s atmosphere and is roughly 2,000 kilometers deep. It sits just above the photosphere and just below the solar transition region. Helium, the lighter of the noble gases, was the first to be discovered. In fact, this element was first identified in the Sun’s chromosphere rather than in the Earth.
Question : 39
Which of the following statements are correct regarding HAL Advanced Medium Combat Aircraft (AMCA)?
- It is twin engine fifth generation fighter plane being developed by HAL.
- It will be equipped with the stealth technology.
- It will have the ability to release weapons at supersonic speeds.
- It is fitted with Kaveri engines.
a) 1, 3 and 4 only
b) 3 and 4 only
c) 1, 2 and 3 only
d) All of these
Answer »Answer: (c)
AMCA will be fitted with K9 or K10 engines. The engines will be developed in collaboration with a foreign manufacturer.
Question : 40
Consider the following statements about INS Kolkata.
- It is constructed by the Mazagon Dockyards Limited.
- It is largest indigenously-built warship.
- It is equipped with Combined Gas and Gas (COGAG) propulsion system.
a) 1 and 3 only
b) 2 and 3 only
c) 1 and 2 only
d) All of the above
Answer »Answer: (d)
Length: 164 m, Width: 18 m, Full load displacement: 7400 tonnes;
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