A. Provide insulation for preserving body heat B. Provide striking surface to the wings for flying C. Make the body surface waterproof D. impart coloration for species as well as sex recognition The correct answer to the question: “The primary function of the feathers in birds is to _________?” is “Provide striking surface to the … Read more
A. Concave B. Plane C. Convex D. Biconcave The correct answer to the question: “The rear view mirror of a motor vehicle is ________?” is “Convex”.
A. The value of ‘g’ is less in water B. Density of air is less than that of water C. Of the viscous force in water D. Of The surface tension of water The correct answer to the question: “Lead ball falls through water more slowly than through air because __________?” is “Of the viscous … Read more
A. – 2O°C B. – 10°C C. + 10°C D. + 20°C The correct answer to the question: “A Fahrenheit thermometer indicates a temperature of ‘ 14°F. its corresponding reading on the Celsius scale will be _________?” is “– 10°C”.
A. Red, green and blue B. Orange, back and violet C. White. red and yellow D. Yellow, green and blue The correct answer to the question: “Which one of the following sets of color combinations is added in color vision in TV’?” is “Red, green and blue”.
A. Remain unaffected B. Fall away from the train C. Fall towards the train D. Fall away from or towards the train depending upon the speed The correct answer to the question: “A train goes past a railway station at a high speed. A young boy standing on the edge of the platform is likely … Read more
A. Water is good conductor of heat B. Water has very high specific heat capacity C. Water boils at a comparatively high temperature D. Evaporation of water produces lot of cooling The correct answer to the question: “Water is a highly effective coolant for a car engine because _________?” is “Water has very high specific … Read more
A. Steam can penetrate the skin B. Steam is at a higher temperature C. Steam contains more energy than boiling water D. Steam is at a higher pressure The correct answer to the question: “Scalding with steam is more severe than scalding by boiling water because_______?” is “Steam contains more energy than boiling water”.
A. The hair barging against the charged comb B. Small electric sparks C. The rubbing of the comb with the hair D. None of the above The correct answer to the question: “The cracking sound heard when dry hair is combed with a hard rubber comb is due to_________?” is “Small electric sparks”.
A. Electroplating B. Annealing C. Galvanization D. Vulcanization The correct answer to the question: “In order to prevent the corrosion of iron pipes they are often coated with a layer of zinc. This process is termed as____________?” is “Galvanization”.