UPSC Senior Administrative Officer Grade I Paper 2015 – Science

Senior Administrative Officer Grade I in DRDO Paper 2015
Date of Exam 10th May 2015 Second Shift

Which one among the following does NOT belong to algae (Thalophyta)?
(a) Chara
(b) Cladophora
(c) Funaria
(d) Ulothrix

Which of the following is present in both xylem and phloem?
(a) Tracheids
(b) Sieve tubes
(c) Companion cells
(d) Parenchyma

The stars twinkle in the sky because the light coming from the stars passes through air having gradually changing
(a) refractive index
(b) material density
(c) both refractive index and material density
(d) temperature

A piece of wood is placed first in a vessel containing water and then in a vessel containing saline water. What one observes is that the piece of wood
(a) compeltely sinks in saline water
(b) floats less in saline water
(c) floats mor ein saline water
(d) just sinks in saline water

A solid cube, a thin circular plate and a solid sphere are made of the same metal and have the same volume. They are heated to the same temperature. If left in the air to cool, which of these will cool fastest and slowest respectively?
(a) Sphere, circular plate
(b) Cube, Sphere
(c) Circular plate, cube
(d) Circular plate, sphere

A person standing in front of a mirror finds his image larger than himself. This implies that the mirror is
(a) Concave
(b) Convex
(c) Plane
(d) Broken

When pressure is applied on a piece of ice, its melting point
(a) decreases
(b) increases
(c) first increases and then decreases
(d) remains unchanged

In vacuum, a coin and a feather are dropped from the same height simultaneously. Which will reach the ground first?
(a) Feather
(b) coin
(c) Both at the same time
(d) feather drifts away

Lead pencils
(a) contain lead with a little plastic clay
(b) contain bauxite with charcoal
(c) do not contain lead but graphite mixed with a little bit of plastic clay
(d) do not contain graphite at all

Which one among the following is a source of renewable energy?
(a) Wood
(b) Fossil fuel
(c) Coal
(d) Wind power

Which one among the following is NOT a layer of Sun?
(a) Charomosphere
(b) Corona
(c) Photosphere
(d) Mantle

The acid used in lead storage batteries is
(a) Sulphuric acid
(b) Nitric acid
(c) Hydrochloric acid
(d) Acetic acid

Which one among the following is a metalloid element?
(a) Mercury
(b) Germanium
(c) Bismuth
(d) Phosphorus

Which one of the following fractions of petroleum has the lowest boiling point?
(a) Kerosene
(b) Diesel
(c) Petrol
(d) LPG