Questions

The meanings of the given words are as follows:
Tremulous: shaking or quivering slightly 

Stringent: (of regulations, requirements, or conditions) strict, precise, and exacting

Garrulous: excessively talkative, especially on trivial matters
Quivery: shaking or trembling slightly
Steady: firmly fixed, supported, or balanced; not shaking or moving
Conjunctive: relating to or forming a connection or combination of things
Desist: stop doing something; cease or abstain

Abstain: restrain oneself from doing or enjoying something
Defer: put off (an action or event) to a later time; postpone
Terse: sparing in the use of words; abrupt
Abrupt: sudden and unexpected
Therefore, it can be observed that option B i.e. ‘quivery, steady’ forms a synonym-antonym pair of ‘tremulous’.

A rotameter is a flow meter that measures volumetric flow of liquids and gases.

In S.I. System unit of angular momentum is "joule.Second".

SI unit of Planck's constant is joule-seconds(j-s).

The Union Ministry of Shipping has extended period of Coastal Berth scheme of flagship Sagarmala Programme for three years upto March, 2020. Besides, its scope was also expanded to cover capital dredging at Major Ports and preparation of detailed project report (DPR) for coastal berth project. The projects under Coastal Berth Scheme are distributed over eight states with highest number of projects in Maharashtra (12 projects), Andhra Pradesh and Goa (10 projects), Karnataka (6 projects), Kerala and Tamil Nadu (3 projects), Gujarat (2 projects) and West Bengal (1 project).

Sun - The Solar Energy is the ultimate source of energy in an ecosystem.