4481: Monazite is an ore of
(a) zirconium
(b) thorium
(c) titanium
(d) iron
4482: The average salary of skilled employees in a firm is Rs. 520 and that of the unskilled employees is Rs. 420. If the average salary of both the groups of employees is Rs. 500, then the percentage of skilled employees in the firm is
(a) 50
(b) 20
(c) 80
(d) 70
4483: The ideal climatic conditions for the cultivation of rice are
(a) rainfall above 100 cm, temperature above 25°C
(b) cool and moist climate for the entire crop period
(c) rainfall below 100 cm, temperature below 25°C
(d) warm and dry climate during the entire crop period
4484: One of the major towns in the Satavahana kingdom was
(a) Arikkamedu
(b) Pratishthana
(c) Korkkai
(d) Maski
4485: A small weight put on the pressure cooker increases the pressure of steam because:
(a) It is air tight
(b) Area of contact is very small
(c) Density of metal is very high
(d) Pressure builds up irrespective of the weight placed