1546: Which one of the following is used as an anti-freeze for the automobile engines?
(a) Propyl alcohol
(b) Ethanol
(c) Methanol
(d) Ethylene glycol
1547: In which one of the following periods were the rock-cut "Hindu" temples a characteristic feature of architecture?
(a) Sungas
(b) Satavahanas
(c) Pallavas
(d) Cholas
1548: In which of the following activities are Indian Remote Sensing (IRS) satellites used?
1. Assessment of crop productivity
2. Locating groundwater resources
3. Mineral exploration
4. Telecommunications
5. Traffic studies
Select the correct answer using the code given below.
(a) 1, 2 and 3 only
(b) 4 and 5 only
(c) 1 and 2 only
(d) 1, 2, 3, 4 and 5
1549: LMNOP, is a semi-circle with centre at R and diameter LP, LSR and RQP are also semi-circles with centres at T and U and diameters LR = RP = 1/2 LP. The ratio of perimeters of LMNOP and LSRQP is
(a) 0.75 : 1
(b) 1 : 1
(c) 1 : 0.75
(d) 1.25 : 1
1550: Which one of the following is not correctly matched ?
(a) Isopleth : A line joining places of equal height
(b) Isobar : A line joining places of equal pressure
(c) Isohyet : A line joining places of equal rainfall
(d) Isotherm : A line joining places of equal temperature