66. Which of the following material is not related to coal
(A) Lignite
(B) Bituminous
(C) Anthracite
(D) Collophane
Answer:
(D) Collophane
Explanation:
Lignite, Bituminous, and Anthracite are the primary ranked grades of coal. Collophane is a massive, cryptocrystalline variety of apatite (a phosphate mineral) and has no relation to coal.
67. For extracting aluminium, which of the following mineral is used
(A) Bauxite
(B) Haematite
(C) Laterite
(D) Dolomite
Answer:
(A) Bauxite
Explanation:
Bauxite is a sedimentary rock with a relatively high aluminium content. It is the world’s primary and most important ore used for the extraction and commercial production of aluminium.
68. The book ‘The Test of my Life’ is written by
(A) Yuvraj Singh
(B) Sachin Tendulkar
(C) Sanjay Manjrekar
(D) Mohd. Azharuddin
Answer:
(A) Yuvraj Singh
Explanation:
The Test of My Life: From Cricket to Cancer and back is the deeply personal autobiography of Indian cricketer Yuvraj Singh, detailing his journey of winning the World Cup and subsequently battling cancer.
69. The intensity of sound is measured in unit
(A) Decibel
(B) Orsted
(C) Hertz
(D) Radian
Answer:
(A) Decibel
Explanation:
In acoustics, the decibel (dB) is the standard logarithmic unit used to express the ratio of a physical quantity, commonly used to measure the intensity or loudness of sound.
70. Recently, Indian Railways partnered with whom to provide free high speed WiFi across 400 railway stations in India?
(A) Google
(B) Airtel
(C) Vodafone
(D) MTNL
Answer:
(A) Google
Explanation:
In a major initiative launched in 2015/2016, Indian Railways’ telecom arm RailTel partnered with Google to provide fast, free, public Wi-Fi access across hundreds of railway stations in India.
