Related Questions

(i) What is global warming? How global warming affects the rapid change of climate? (ii) What are the bad impacts of climate change? (iii) How climate change affects the environment of Bangladesh (iv) How global warming can be minimized (v) What should be the role of students to protect the environment.
A (i) Global warming is the main natural reason and using harmful chemicals in everyday life the main reason created by men. The climate is changing rapidly that result in the rise of the earth's average temperature
B (ii) Climate change impacts include floods, cyclones, storm surges and drought, ice sheets melting which will seriously affect the agriculture and livelihood especially at the poor.
C (iii) Bangladesh is one of the largest deltas in the world which is highly vulnerable to Natural Disasters because of its Geographical location, Fiat and low-lying landscape, Population density, Poverty, Illiteracy, Lack of Institutional setup, etc.
D (iv) To reduce the bad impact of climate change people should be aware of. Tree plantation can reduce global warming which is the main natural reason for climate change. Stop using harmful chemicals can reduce environmental pollution which is the main man
E (v) Students should be careful to protect the environment and raise awareness. Thus the students can play a vital role to reduce bad impact of climate changes.
Thermal conductivity based continuous flue gas analyser makes use of varying thermal conductivity of the constituents of flue gases. Which of the following constituents of flue gases has the maximum thermal conductivity?
A CO2
B N2
C O2
D CO
Which one of the following equations most directly determines the amount of current flowing through a resistor when you know the value of the resistor and the voltage drop across it?
A E = PR
B E = I2R
C I = E/R
D I = ER
E None of the above
In a circuit a 33 Q resistor carries a current of 2 A.. The voltage across the resistor is
A 33 V
B 66 V
C 80 V
D 132 V
Thermal efficiency of a thermal power plant is of the order of
A 15%
B 20%
C 30%
D 45%
The electric power generation cost in nuclear power plant is less than that in a coal based thermal power plant, mainly because the
A Fuel cost per unit power generated is less
B Thermal efficiency of the former is higher
C Maintenance cost of the former is less
D None of these
The major reason of hydrodynamic noise (i.e., noise resulting from liquid flow) is
A Pipe vibrations
B Cavitation
C Boundary layer separation
D Fluctuation in liquid flow
Aerodynamic noise resulting from turbulent gas flow is the most prevalent source of valve noise in fluid ilow control. It is caused due to
A Reynold stresses
B Shear forces
C Both A & B
D Neither A nor B
The power rating of a resistor determines the minimum power that it can handle safely.
A True
B False
A triple riveted butt joint with double straps of unequal width is to be designed for a boiler shell. The pitch of the rivets in the outer row is double the pitch in the inner row and zigzag riveting is proposed. Which of the following statement is correct?
A There are four rivets per pitch length, all in double shear
B There are four rivets per pitch length, out of which two are in single shear and two are in double shear
C There are five rivets per pitch length, all in double shear
D There are five rivets per pitch length, out of which four are in double shear and one is in single shear

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