Practice with real exam questions. Get instant feedback with detailed explanations and track your performance.
0%
Your Score
Answer questions to track
0
Correct
0
Wrong
0
Total
Filter Questions
All Subjects /All Chapters/
All Exams
Click an option to answer. Your score is tracked above.
907 Questions
Page 25 of 37
601
The safe threshold limit of CO₂ concentration in the atmosphere in ppm is:
OPSC Prelims 2017 General Issues on Environmental Ecology, Bio-diver
Answer Panel
Select an option to reveal
Click any option on the left to see the answer and explanation.
Detailed Explanation
602
The approximate lifetime of a common electric bulb is 1,000 hrs whereas the approximate lifetime of an LED bulb is:
OPSC Prelims 2017 General Science and Technology
Answer Panel
Select an option to reveal
Click any option on the left to see the answer and explanation.
Detailed Explanation
603
What is a fishing gear?
OPSC Prelims 2017 General Science and Technology
Answer Panel
Select an option to reveal
Click any option on the left to see the answer and explanation.
Detailed Explanation
604
Bleaching powder used in Fish pond is working as:
OPSC Prelims 2017 General Science and Technology
Answer Panel
Select an option to reveal
Click any option on the left to see the answer and explanation.
Detailed Explanation
605
It is thought that dozens of ships and planes have disappeared under mysterious circumstances in the area. To most people, it is an area of bad luck and extraterrestrial activity. This area is known as:
OPSC Prelims 2017 Current Events of National and International Impor
Answer Panel
Select an option to reveal
Click any option on the left to see the answer and explanation.
Detailed Explanation
606
Arid Forest Research Institute (AFRI) is situated at:
OPSC Prelims 2017 Indian and World Geography
Answer Panel
Select an option to reveal
Click any option on the left to see the answer and explanation.
Detailed Explanation
607
Silviculture is the:
OPSC Prelims 2017 Indian and World Geography
Answer Panel
Select an option to reveal
Click any option on the left to see the answer and explanation.
Detailed Explanation
608
Which of the following is an ore of Iron?
OPSC Prelims 2017 Indian and World Geography
Answer Panel
Select an option to reveal
Click any option on the left to see the answer and explanation.
Detailed Explanation
609
Bronze is an alloy of:
OPSC Prelims 2017 General Science and Technology
Answer Panel
Select an option to reveal
Click any option on the left to see the answer and explanation.
Detailed Explanation
610
What does OTEC stand for?
OPSC Prelims 2017 General Science and Technology
Answer Panel
Select an option to reveal
Click any option on the left to see the answer and explanation.
Detailed Explanation
611
What is a bio-gas plant?
OPSC Prelims 2017 General Issues on Environmental Ecology, Bio-diver
Answer Panel
Select an option to reveal
Click any option on the left to see the answer and explanation.
Detailed Explanation
612
The first nuclear reactor in India was built in the year 1956. Its name was:
OPSC Prelims 2017 General Science and Technology
Answer Panel
Select an option to reveal
Click any option on the left to see the answer and explanation.
Detailed Explanation
613
Kyoto Protocol was signed by member countries at Kyoto (Japan) in:
OPSC Prelims 2017 General Issues on Environmental Ecology, Bio-diver
Answer Panel
Select an option to reveal
Click any option on the left to see the answer and explanation.
Detailed Explanation
614
LNG stands for:
OPSC Prelims 2017 General Science and Technology
Answer Panel
Select an option to reveal
Click any option on the left to see the answer and explanation.
Detailed Explanation
615
Which of the following cities is associated with the organization of the "Earth Summit"?
OPSC Prelims 2017 General Issues on Environmental Ecology, Bio-diver
Answer Panel
Select an option to reveal
Click any option on the left to see the answer and explanation.
Detailed Explanation
616
The pollutant generated in high quantity by the thermal power plants is:
OPSC Prelims 2017 General Issues on Environmental Ecology, Bio-diver
Answer Panel
Select an option to reveal
Click any option on the left to see the answer and explanation.
Detailed Explanation
617
The pollutants like phenol and mercury can be removed from water by:
OPSC Prelims 2017 General Issues on Environmental Ecology, Bio-diver
Answer Panel
Select an option to reveal
Click any option on the left to see the answer and explanation.
Detailed Explanation
618
Considering the global warming potential of CO₂ as one, the global warming potential of CH₄ has been estimated to be approximately:
OPSC Prelims 2017 General Issues on Environmental Ecology, Bio-diver
Answer Panel
Select an option to reveal
Click any option on the left to see the answer and explanation.
Detailed Explanation
619
Ozone layer in the stratosphere is affected by the increase in the atmospheric concentration of:
OPSC Prelims 2017 General Issues on Environmental Ecology, Bio-diver
Answer Panel
Select an option to reveal
Click any option on the left to see the answer and explanation.
Detailed Explanation
620
In a pond ecosystem, the BOD increases due to:
OPSC Prelims 2017 General Issues on Environmental Ecology, Bio-diver
Answer Panel
Select an option to reveal
Click any option on the left to see the answer and explanation.
Detailed Explanation
621
Biological equilibrium is the balance between:
OPSC Prelims 2017 General Issues on Environmental Ecology, Bio-diver
Answer Panel
Select an option to reveal
Click any option on the left to see the answer and explanation.
Detailed Explanation
622
The introduction of new life forms in a denuded habitat is initiated by the process of:
OPSC Prelims 2017 General Issues on Environmental Ecology, Bio-diver
Answer Panel
Select an option to reveal
Click any option on the left to see the answer and explanation.
Detailed Explanation
623
Dark-colored soil with high water-holding capacity is considered highly productive as it contains:
OPSC Prelims 2017 Indian and World Geography
Answer Panel
Select an option to reveal
Click any option on the left to see the answer and explanation.
Detailed Explanation
624
Three US Scientists have been awarded the Nobel prize in Physics for their work on gravitational waves. Which of the following is not one of them?
OPSC Prelims 2017 Current Events of National and International Impor
Answer Panel
Select an option to reveal
Click any option on the left to see the answer and explanation.
Detailed Explanation
625
Which of the following sectors has attracted the highest Foreign Direct Investment flows into India during the recent years?
OPSC Prelims 2017 Indian Economy and Social Development
Answer Panel
Select an option to reveal
Click any option on the left to see the answer and explanation.