CAPF AC 2018 PYQ with Answer — The tides whose height is 20 percent more than normal tide are called

2018 · Q50

The tides whose height is 20 percent more than normal tide are called

indian-world-geographyoceanography

Aspring tides
Bneap tides
Capogean and perigean tides
Ddaily and semi-diurnal tides

Explanation

Spring tides occur at new and full moon, when the Sun, Moon and Earth align and their gravitational pulls combine, producing tides about 20% higher (and lower) than normal. Neap tides at the quarter moons are weaker; apogean/perigean describe the Moon's orbital distance, not a 20% height increase; daily and semi-diurnal describe tidal frequency. Hence these are called spring tides.