1. Which of the following materials will witness a decrease in resistance when its temperature d ecreases? 1. Mica 2. Aluminum 3. Paper 4. Rubber Ans - 2 2. The operating temperature of a gas-filled tungsten filament lamp is about ______. 1. 2700⁰ C 2. 2000⁰ C 3. 1500⁰ C 4. 2200⁰ C Ans - 1 3. The application of stepper motor is______. 1. Hair dryer 2. Mixture & grinder 3. Exhaust fan motor 4. Printers & fax machine Ans - 4 4. Which of the following is NOT an effect of single phasing in a three-phase induction motor ? 1. Motor will continue run from running position 2. Motor current is increasing 2.5 times to average current 3. Motor cannot be increasing the heating 4. Motor cannot be started from stop position Ans - 1 5. When metal body of equipment is earthed, it protects the equipment from? 1. Over current 2. Leakage current 3.  Under current 4. Breakdown voltage Ans - 2 6. As a thumb rule for 415 V, 3-phase squirrel cage induction motors , full load current can...