CDS 2011 (2) ( held on 18.09.2011 )

Solved Question Paper - General Knowledge

87. When you pull out the plug connected to an electrical appliance, you often observe a spark. To which property of the appliance is this related?

  1. Resistance
  2. Inductance
  3. Capacitance
  4. Wattage

88. The focal length of a convex lens is

  1. the same for all colours
  2. shorter for blue light than for red
  3. shorter for red light than for blue
  4. maximum for yellow light

89. If the door of a running refrigerator in a closed room is kept open, what will be the net effect on the room?

  1. It will cool the room
  2. It will heat the room
  3. It will make no difference on the average
  4. It will make the temperature go up and down

90. When a ball drops onto the floor it bounces. Why does it bounce?

  1. Newton’s third law implies that for every action (drop) there is a reaction (bounce)
  2. The floor exerts a force on the ball during the impact
  3. The floor is perfectly rigid
  4. The floor heats up on impact

91. Renewable energy can be obtained from

  1. Fossils
  2. Radioactive elements
  3. Biomass
  4. Natural gas

92. A body has a mass of 6kg on the Earth; when measured on the Moon, its mass would be

  1. nearly 1 kg
  2. less than 1 kg
  3. less than 6 kg
  4. 6 kg

93. Which one among the following is not included in the basic functions of operating system?

  1. Job control
  2. Job scheduling
  3. Memory management
  4. Data management

94. Transformer is a kind of appliance that can

  1. Increase power
  2. Increase voltage
  3. Decrease voltage
  4. Measure current and voltage

Select the correct answer using the codes given below:

  1. 1 and 4
  2. 4 only
  3. 2 and 3 only
  4. 2, 3 and 4

95. What is the main constituent of a Pearl?

  1. Calcium carbonate and magnesium carbonate
  2. Calcium sulphate only
  3. Calcium oxide and calcium sulphate
  4. Calcium carbonate only

96. From which one among the following water sources, the water is likely to be contaminated with fluoride?

  1. Ground water
  2. River water
  3. Pond water
  4. Rain water

97. Which one among the following will you put into pure water in order to pass electric current through it?

  1. Kerosene
  2. Mustard oil
  3. Lemon juice
  4. Sugar

98. Gypsum (CaSO4.2H2O) is added to clinker during cement manufacturing to

  1. decrease the rate of setting of cement
  2. bind the particles of calcium silicate
  3. facilitate the formation of colloidal gel
  4. impart strength to cement

99. Sodium thiosulfate (Na2S2O3) solution is used in photography to

  1. remove reduced silver
  2. reduce silver bromide (AgBr) grain to silver
  3. remove undercomposed AgBr as a soluble silver thiosulfate complex
  4. convert the metallic silver to silver salt

100. Fire fly gives us cold light by virtue of the phenomenon of

  1. Fluorescence
  2. Phosphorescence
  3. Chemiluminescence
  4. Effervescence

101. The Iron Pillar near Qutub Minar draws attention of scientists due to its

  1. Antiquity
  2. Glitter
  3. Hardness
  4. Rustlessness

102. Sacrificial anode protects iron of ships, underground pipelines etc. from rusting, a process known as cathodic protection. Which one of the following metals cannot be used as a sacrificial anode?

  1. Tin
  2. Zinc
  3. Magnesium
  4. Aluminium

103. Match List I with List II and select the correct answer using the code given below the Lists:

List – I
(Acid)		List - II
(Source)
A. Lactic acid1. Tamarind
B. Tartaric acid2. Orange
C. Oxalic acid3. Tomato
D. Citric acid4. Sour curd

Codes:

  1. A - 2; B - 3; C - 1; D - 4
  2. A - 2; B - 1; C - 3; D - 4
  3. A - 4; B - 3; C - 1; D - 2
  4. A - 4; B - 1; C - 3; D - 2

104. Which one among the following will be absorbed fastest through the wall of digestive system?

  1. Black coffee as a hot beverage
  2. DDT taken as a poison
  3. Raw alcohol taken as a drink
  4. Ice cream as a desert

105. One of the occupational health hazards commonly faced by the workers of ceramics, pottery and glass industry is

  1. stone formation in gall bladder
  2. melanoma
  3. silicosis
  4. stone formation in kidney

106. It has been observed the astronauts lose substantial quantity of calcium through urine during space flight. This is due to

  1. hypergravity
  2. microgravity
  3. intake of dehydrated food tablet
  4. low temperature in cosmos