84) The Primary purpose of a meggar is to measure reesistance whose values are in the range of

85) Graphite is used in nuclear reactor

86) The primary unit of measurement for engineering drawings and design in the mechanical industries is the

87) A "fire-wall" in a computer system acts as

88) A man is watching from top of a tower a boat speeding away from the tower. The boat makes an angle of depression of 45 degree with the man's eyes when at a distance of 60 meters from the tower. After 5 seconds, the angle of depression becomes 30 degree. Wh