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Chapter 1.2 - Basics of Energy and its Various Forms

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bee_energy
Jawaharlal Nehru Technological University (JNTUH), Hyderabad

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Question bank for Energy Managers & Energy Auditors Chapter 1.2 Basics of Energy and its various forms Part I: Objective Type Questions and Answers 1. The type of energy possessed by the charged capacitor is a) Kinetic energy 2. b) Electrostatic c) Potential The energy stored in the bonds of atoms and molecules is called a) Kinetic energy b) Chemical energy c) Potential energy 3. d) Magnetic energy Active power consumption of motive drives AC 3 phase can be determined by using one of the following relations. a) 3 x V x I b) 3 x V2 x I x cos c) 3 x V x I2 x Cos 4. d) 3 x V x I x Cos The grade of energy can be classified as low, high, extra ordinary. In case of electrical energy it would fall under ____ category. (EM/EA) a) low grade 5. b) extra ordinary grade c) high grade d) none of the above The portion of apparent power that doesn t do any work is termed as a) Apparent power b) Active power c) Reactive Power 6. d) Magnetic d) None of the above Power factor (PF) is the ratio of (EM/EA) a) Apparent power & Active power c) Active Power & Apparent power 7. b) Active power & Reactive power d) Apparent power & Reactive power kVA is also called as a) reactive power c) active power 8. b) apparent power d) captive power The energy consumed by a 50 kW motor loaded at 40 kW over a period of 4 hours is a. 50 kWh 9. b) 160 kWh c) 40 kWh The ratio of maximum demand to the connected load is termed as a) Load factor b) Demand factor c) Contract demand 10. d) none of the above A single phase induction motor is drawing 10 amps at 230 volts. If the operating power factor of the motor is 0.9, then the power drawn by the motor is a) 2.3 kW 11. b) 3.58 kW c) 2.07 kW d) 2.70 kW The quantity of heat required to raise the temperature of 1 gram of water by 1 OC is termed as a) Specific heat 12. d) 2000 kWh b) Heat capacity c) One Calorie d) Sensible heat Nameplate kW or HP rating of a motor indicates a) input kW to the motor c) minimum input kW to the motor 1.2.Basics of Energy and its various forms b) output kW of the motor d) maximum input kW to the motor 7

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