91. A piece of metal becomes hot when it lies in the sun through:
(A) Conduction
(B) Convection
(C) Radiation
(D) Heat energy
92. The CPU is located on the main circuit board in a computer. What is this board called?
(A) Motherboard
(B) Fatherboard
(C) Main-board
(D) Base-board
93. The flying of birds is a consequence of Newton’s:
(A) First law of motion
(B) Second law of motion
(C) Third law of motion
(D) Both first and second laws of motion
94. Why do wet clothes dry more quickly on a warm day?
(A) Hot air carries less moisture
(B) Hot air can absorb moisture from the air rather quickly
(C) High temperature of the air helps fast evaporation
(D) Hot air carries much moisture
95. Scalding with steam is more severe than scalding by boiling water because:
(A) Steam can penetrate the skin
(B) Steam is at a lower temperature
(C) Steam contains more energy than boiling water
(D) Steam is at a higher pressure
96. An increase of carbon dioxide in the atmosphere causes:
(A) Fall in Earth’s temperature
(B) Rise in Earth’s temperature
(C) Uniformity in Earth’s temperature
(D) None of the above
97. During a total solar eclipse, there is most likely to be:
(A) A decrease in the rate of photosynthesis
(B) An increase in the rate of photosynthesis
(C) A decrease in the rate of respiration
(D) No effect on either photosynthesis or respiration
98. Friction can be reduced by changing over from:
(A) Sliding to rolling
(B) Rolling to sliding
(C) Potential energy to kinetic energy
(D) Dynamic to static
99. Excessive heating and repeated use of cooking oil are most undesirable because:
(A) The oil vapors can cause indoor pollution
(B) Carcinogenic substances like benzpyrene are produced
(C) Nutrient value of the food is lost
(D) Of the loss and wastage of oil
100. Which of the following statements in regard to diabetes is not correct?
(A) It is a disease of metabolism
(B) It occurs when the blood sugar level decreases
(C) Proper dose (through injection) of the hormone insulin helps to keep the disease under control
(D) If not controlled, it results in loss of weight