616: Gestation period of a goat is about:

(a) 150 days

(b) 200 days

(c) 250 days

(d) 365 days
617: A rapid increase in the rate of inflation is sometimes attributed to the "base effect", What is "base effect" ?

(a) It is the impact of the price levels of previous year on the calculation of inflation rate

(b) It is the impact of drastic deficiency in supply due to failure of crops

(c) It is the impact of the surge in demand due to rapid economic growth

(d) None of the statements (a), (b) and (c) given above is correct in this context
Explanation:
The base effect relates to inflation in the corresponding period of the previous year. For e.g. if the inflation rate was too low in the corresponding period of the previous year, even a smaller rise in the Price Index will arithmetically give a high rate of inflation now; On the other hand if the price index had risen at a high rate in the corresponding period of the previous year and recorded high inflation rate, a similar absolute increase in the Price index now will show a lower inflation rate now.
618: Consider the following statements:

1. Purchasing Power Parity (PPP) exchange rates are calculated by comparing the prices of the same basket of goods and services in different countries.
2. In terms of PPP dollars, India is the sixth largest economy in the world.

Which of the statements given above is/are correct?

(a) 1 only

(b) 2 only

(c) Both 1 and 2

(d) Neither 1 nor 2
Explanation:
PPPs measure the total amount of goods and services that a single unit of a countrys currency can buy in another country. The PPP between countries A and B measures the amount of country As currency required to purchase a basket of goods and services in country A as compared to the amount of country Bs currency to purchase a similar basket of goods and services in country B.

Source: http://agricoop.nic.in/sites/default/files/Cwwg%20data%20as%20on%2012.10.2018.pdf
619: The rainbow and the rainbow-like colours seen on a thin film of oil on a water surface are two phenomena. They are
(a) Similar in nature and both are due to refraction of light
(b) Different in nature and rainbow is due to interference of light, while colour of thin film is due to diffraction
(c) Similar in nature and both are due to interference of light
(d) Different in nature and rainbow is due to refraction, while colour of thin film is due to interference of light
620: Why do you feel chill after having a dip in sea water?

(a) The difference in temperature between sea water and the atmosphere

(b) Evaporation of water from the body

(c) Deposition of salt on the body

(d) None of these