Practice Test for BEE Energy Auditor Exam - Paper 2

Description

In this practice test set, you will get a total 5 five tests to solve and practice. All this five practice test questions are related to the BEE Energy Auditor and Energy Manager Exam. The Questions which are included in the five test is in MCQ format. Most of the relevant and previous years questions are included in the test. For the numerical the shortest solution is provided so, it will be easy for you to study and practice the various questions.

The practice tests include the following point-based questions: 

• Fuels and Combustion

• Boilers

• Steam System

• Furnaces

• Insulation and Refractories

• FBC Boilers

• Cogeneration

• Waste heat recovery

• Heat Exchangers

Sample Questions:

1] An oil fired reheating furnace has an operating temperature of around 1000 °C. Average furnace oil consumption is 330 litres/hour. Flue gas exit temperature after the air preheater is 820 °C. Combustion air is preheated from ambient temperature of 35 °C to 215°C through the air preheater. The other data are as given below

• Specific gravity of oil = 0.92

• Calorific value of oil = 10,200 kcal/kg

• Average O2 percentage in flue gas = 13.5 %

• Theoretical air required = 14 kg of air per kg of oil

• Specific heat of air = 0.23 kcal/kg°C

• Specific heat of flue gas = 0.25 kcal/kg°C

The sensible heat carried away by the exhaust flue gases in kcals/hr and as a percentage of the energy input.

Solution:

• Fuel input = (330 litres/hr x 0.92 kg/litre) = 303.6 kg/hr

• Energy Input = (303.6 kg oil/hr x 10,200 kcals/kg oil) = 30,96,720 kcal/hr

• Excess air = [O2 x 100/(21-O2)] = (13.5 x 100)/(21 - 13.5) = 180 %

• Theoretical air required = 14 kg of air/kg of oil

• Actual mass of air required = 14 x (1 + 180 /100) = 39.2 kg air/kg of oil

• Mass of flue gas (m) = (39.2 + 1) = 40.2 kg flue gas/kg oil

• Specific heat of flue gas (Cp) = 0.25 kcal/kg.oC

• Sensible heat loss in the flue gas = (m x Cp x ΔT)flue gas = (40.2 x 0.25 x (820-35))  Sensible heat loss in the flue gas= 7889.3 kcal/kg of oil

• Sensible heat loss in the flue gas= (7889.3 kcal/kg of oil x 303.6 kg oil/hr)

• Sensible heat loss in the flue gas = 2395176.3 kcal/hr

• Sensible heat loss in the flue gas as % heat loss to input energy = (2395176.3 / 30,96,720) x 100 = 77.35 %

Money Back Guarantee:

The practice test involves a diversity of questions, and i am definitely sure i will help you in your exam preparations. And you will pass the exams with this practice test.

About Author:

Author Mr. Kiran Beldar is  BEE Certified Energy Manager and he himself has cleared the exam. He is a professor at Mumbai University. His vast experience is passed on through this practice test.

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