General Awareness Test-12 - NDA MCQ

The upper and lower portions in common type of bifocal lenses are concave and convex respectively. 

Tungsten has the highest melting point and lowest vapour pressure of all metals. 

The inert gas within the bulb prevents the filament from evaporating. Thus it increases the life of the filament. 

Short wavelength is slowed down and refracted the most. 

Oscilloscope is and instrument which allows us to see waves produced by sound. The microphone can then pick up the sound and convert it to an electrical signal which can be displayed on the oscilloscope.

Maximum n of electrons in K, L, M and N is 2, 8, 18 and 32 respectively. 

Moderators like carbon and Graphite are used for slowing down the neutrons from fission have very high speeds and must be slowed greatly by “moderation” to maintain the chain reaction. 

The object is rest because body displacement not changes with respect to time.

Khajuraho temples were built between 950 and 1050 by the Chandela dynasty. The Khajuraho Group of Monuments is a group of Hindu and Jain temples in Madhya Pradesh, India, about 175 kilometers (109 mi) southeast of Jhansi. They are one of the UNESCO World Heritage Sites in India.
 

The Mehrauli iron pillar of Delhi, India is a 7 meter (22 feet) high pillar in the Qutb complex which is notable for the composition of the metals used in its construction. The pillar was erected by Chandragupta II Vikramaditya in the Gupta period.

The dead sea has the highest salinity. The Dead Sea is 306 m (1,004 ft) deep, the deepest hypersaline lake in the world. With 34.2% salinity (in 2011), it is also one of the world’s saltiest bodies of water.

The diurnal temperature range (DTR) is the difference between the daily maximum and minimum temperature. Desert areas typically have the greatest diurnal temperature variations.

ARTICLE 365-When any State has failed to comply with, or to give effect to, any directions given in the exercise of the executive power of the Union under any of the provisions of this Constitution, it shall be lawful for the President to hold that a situation has arisen in which the Government of the State cannot be carried on in accordance with the provisions of the Constitution.

The Bretton Woods Agreement is the landmark system for monetary and exchange rate management established in 1944. It was developed at the United Nations Monetary and Financial Conference held in Bretton Woods, New Hampshire, from July 1 to July 22, 1944. The Currency Convertibility concept in its original form is originated in the Bretton Woods agreement.

Stomata are the microscopic openings or pores in the epidermis of leaves and young stems. Stomata are generally more numerous on the underside of leaves. They provide for the exchange of gases between the outside air and the branched system of interconnecting air canals within the leaf.
 

If a small piece of sodium is dropped into some ethanol, it reacts steadily to give off bubbles of hydrogen gas and leaves a colourless solution of sodium ethoxide.
 

Reproductive part of the flower is androecium and gynoecium. Androecium (or stamen) refers to the male part of the flower whereas the gynoecium (or pistil or carpel) refers to the female part of the flower.

All prokaryotic organisms come under Kingdom Monera. Monera includes bacteria, mycoplasmas, cyanobacteria (blue-green alga) and actinomycetes.