EDITORIALS & ARTICLES
December 16, 2020 - Daily Quiz
1. Consider the following statements:
- Coal ash contains arsenic, lead and mercury.
- Coal-fired power plants release sulphur dioxide and oxides of nitrogen into the environment.
- High ash content is observed in Indian coal.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 and 3 only
(c) 3 only
(d) 1, 2 and 3
2. An alloy of zinc, tin and copper contains 90% of copper, 7% of zinc and 3% of tin. A second alloy of copper and tin only is melted with the first, and the mixture contains 85% of copper, 5% of zinc and 10% of tin. Find the percentage of tin in the second alloy.
(a) 27.5%
(b) 55%
(c) 22.5%
(d) 45%
3. Consider the following pairs:
| Rivers |
Flows into |
| 1. Mekong |
Andaman Sea |
| 2. Thames |
Irish Sea |
| 3. Volga |
Caspian Sea |
| 4. Zambezi |
Indian Ocean |
Which of the pairs given above is/are correctly matched?
(a) 1 and 2 only
(b) 3 only
(c) 3 and 4 only
(d) 1, 2 and 4 only
4. Four pipes P, Q, R and S can fill a cistern in 20, 25, 40 and 50 hours respectively. The first pipe P was opened at 6:00 am, Q at 8:00 am, R at 9:00 am and S at 10:00 am. when will the Cistern be full?
(a) 3:09 pm
(b) 4:18 pm
(c) 11:09 am
(d) 12:15 pm
5. Steel slag can be the material for which of the following?
- Construction of base road
- Improvement of agricultural soil
- Production of cement
Select the correct answer using the code given below:
(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
ANSWERS
1. (d)
2. (a)
3. (c) Mekong flows through many countries: China, Burma, Thailand, Laos, Cambodia, and finally Vietnam. The Mekong begins in the Lasagongma Spring which is in the plateaus of Tibet, disputed part of China, and flows about 2,703 miles (4,350 km) south-east to the South China Sea. Thames river flows into North sea.
4. (a)
5. (d)
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