Related Questions

Which of the following is capable of acting both as an acid flux as well as a basic flux in the metal extraction from its ore?
A Silica
B Lime
C Alumina
D Fluorite
Heat flux increases with temperature drop beyond the Leiden frost point in the plot of heat flux vs. temperature drop for a boiling liquid, because
A Convection becomes important
B Conduction becomes important
C Radiation becomes important
D Sub-cooled boiling occurs
In a particular type of welding, flux is prepared in the form of a coarse powder and granulated flux is spread over the joint. What is this type of welding process called?
A Electric arc welding
B Submerged arc welding
C MIG welding
D TIG welding
A person can travel from Dhaka to Faridpur in 5 different ways and then come back in any of these ways. How many different routes are possible for him to go to Faridpur and come back?
A 10
B 9
C 25
D 20
(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.
In a flange coupling, the keys are staggered at __________ along the circumference of the shafts in order to divide the weakening effect caused by key ways.
A 90°
B 135°
C 160°
D 180°
Out of eight crew members three particular members can sit only on the left side. Another two particular members can sit only on the right side. Find the number of ways in which the crew can be arranged so that four men can sit on each side.
A 864
B 863
C 865
D 1728
Choose correct form of voice change in the sentence: The cycolne has caused a great damage.
A A great damage has caused by the cycolne
B A great damage was caused by the cycolne
C A great damage have caused by the cycolne
D A great damage has been caused by the cycolne
The volumetric change of the fluid caused by a resistance is known as
A Volumetric strain
B Volumetric index
C Compressibility
D Adhesion
A certain company assigns employees to offices in such a way that some of the offices can be empty and more than one employee can be assigned to an office. In how many ways can the company assign 3 employees to 2 different offices?
A 5
B 6
C 7
D 8

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