Questões de Concurso Público CNEN 2014 para Tecnologista em Análise de Segurança
Foram encontradas 95 questões
Read text III to answer 21 through 25.
Acid rain and… the facts
www.acidrain.org.ca / Oxford Children´s Encyclopedia
What causes acid rain?
Acid rain is caused by air pollution. When fossil fuels such as coal and oil are burned, two gases, sulphur dioxide and nitrogen oxide, are released into the atmosphere. These two pollutants eventually react with the moisture in the air. When this polluted mixture falls onto the ground, it is called acid rain.
Rain measuring between 0 and 5 on the pH scale, is acidic therefore called ACID RAIN.
Acid rain is harmful to the environment. It is hard to control because it may be blown by the wind, falling thousands of kilometers from where it was first formed. For example, much of the acid rain in Canada is caused by smoke from factories and power-stations in the USA. The acid rain in Scandinavia may come from Britain.
What are the effects of acid rain?
Acid rain has many different effects. It has killed fish in the lakes of North America, Scandinavia, Scotland, and Wales. Vast areas of forest in northern and central Europe are dying because of it, while in many European cities statues and stone buildings are being eaten away by the acid. Acid rain corrodes metalwork such as steel bridges and railings; it also attacks some types of concrete. Even the water that we drink is slowly being polluted by acid rain.
What are the effects on trees and soil?
One of the most serious impacts of acid precipitation is on forests and soils. Great damage is done when sulphuric acid falls onto the earth as rain. Nutrients present in the soils are washed away. Aluminium also present in the soils is freed and this toxic element can be absorbed by the roots of trees. Thus, the trees starve to death because they have been deprived of their vital nutrients such as calcium and magnesium.
Acid rain is one of the most serious environmental problems of our time. It is a global problems that is gradually affecting our world.
How does acid rain effect lakes?
Lakes that have been acidified cannot support the same variety of life as healthy lakes. As a lake becomes more acidic, various types of fish disappear. Other effects of acidified lakes on fish include: decreased growth, inability to regulate their own body chemistry, reduced egg deposition, deformities in young fish and increased susceptibility to naturally occurring diseases.
Clean rain usually has a pH of 5.6. It is slightly acidic because of carbon dioxide which is naturally present in the atmosphere. Vinegar, by comparison, is very acidic and has a pH of 3.
What is pH?
This is a measure of how acidic or alkaline a substance is. (See a pH scale below).
The initials pH stand for Potential of Hydrogen. Acids have pH values under 7, and alkalis have pH values over 7. If a substance has a pH value of 7. It is neutral-neither acidic or alkaline.
Because the pH scale is logarithmic, a difference of one pH unit represents a tenfold, or ten times change. For example, the acidity of a sample with a pH of 5 is ten times greater than that of a sample with a pH of 6. A difference of 2 units, from 6 to 4, would mean that the acidity in one hundred times greater, and so on.
(Reinildes Dias. Reading Critically in English, 3rd ed. UFMG 2002. Adaptado.)
Acid rain does NOT cause
Read text III to answer 21 through 25.
Acid rain and… the facts
www.acidrain.org.ca / Oxford Children´s Encyclopedia
What causes acid rain?
Acid rain is caused by air pollution. When fossil fuels such as coal and oil are burned, two gases, sulphur dioxide and nitrogen oxide, are released into the atmosphere. These two pollutants eventually react with the moisture in the air. When this polluted mixture falls onto the ground, it is called acid rain.
Rain measuring between 0 and 5 on the pH scale, is acidic therefore called ACID RAIN.
Acid rain is harmful to the environment. It is hard to control because it may be blown by the wind, falling thousands of kilometers from where it was first formed. For example, much of the acid rain in Canada is caused by smoke from factories and power-stations in the USA. The acid rain in Scandinavia may come from Britain.
What are the effects of acid rain?
Acid rain has many different effects. It has killed fish in the lakes of North America, Scandinavia, Scotland, and Wales. Vast areas of forest in northern and central Europe are dying because of it, while in many European cities statues and stone buildings are being eaten away by the acid. Acid rain corrodes metalwork such as steel bridges and railings; it also attacks some types of concrete. Even the water that we drink is slowly being polluted by acid rain.
What are the effects on trees and soil?
One of the most serious impacts of acid precipitation is on forests and soils. Great damage is done when sulphuric acid falls onto the earth as rain. Nutrients present in the soils are washed away. Aluminium also present in the soils is freed and this toxic element can be absorbed by the roots of trees. Thus, the trees starve to death because they have been deprived of their vital nutrients such as calcium and magnesium.
Acid rain is one of the most serious environmental problems of our time. It is a global problems that is gradually affecting our world.
How does acid rain effect lakes?
Lakes that have been acidified cannot support the same variety of life as healthy lakes. As a lake becomes more acidic, various types of fish disappear. Other effects of acidified lakes on fish include: decreased growth, inability to regulate their own body chemistry, reduced egg deposition, deformities in young fish and increased susceptibility to naturally occurring diseases.
Clean rain usually has a pH of 5.6. It is slightly acidic because of carbon dioxide which is naturally present in the atmosphere. Vinegar, by comparison, is very acidic and has a pH of 3.
What is pH?
This is a measure of how acidic or alkaline a substance is. (See a pH scale below).
The initials pH stand for Potential of Hydrogen. Acids have pH values under 7, and alkalis have pH values over 7. If a substance has a pH value of 7. It is neutral-neither acidic or alkaline.
Because the pH scale is logarithmic, a difference of one pH unit represents a tenfold, or ten times change. For example, the acidity of a sample with a pH of 5 is ten times greater than that of a sample with a pH of 6. A difference of 2 units, from 6 to 4, would mean that the acidity in one hundred times greater, and so on.
(Reinildes Dias. Reading Critically in English, 3rd ed. UFMG 2002. Adaptado.)
According to the text, a pH of 8
Read text III to answer 21 through 25.
Acid rain and… the facts
www.acidrain.org.ca / Oxford Children´s Encyclopedia
What causes acid rain?
Acid rain is caused by air pollution. When fossil fuels such as coal and oil are burned, two gases, sulphur dioxide and nitrogen oxide, are released into the atmosphere. These two pollutants eventually react with the moisture in the air. When this polluted mixture falls onto the ground, it is called acid rain.
Rain measuring between 0 and 5 on the pH scale, is acidic therefore called ACID RAIN.
Acid rain is harmful to the environment. It is hard to control because it may be blown by the wind, falling thousands of kilometers from where it was first formed. For example, much of the acid rain in Canada is caused by smoke from factories and power-stations in the USA. The acid rain in Scandinavia may come from Britain.
What are the effects of acid rain?
Acid rain has many different effects. It has killed fish in the lakes of North America, Scandinavia, Scotland, and Wales. Vast areas of forest in northern and central Europe are dying because of it, while in many European cities statues and stone buildings are being eaten away by the acid. Acid rain corrodes metalwork such as steel bridges and railings; it also attacks some types of concrete. Even the water that we drink is slowly being polluted by acid rain.
What are the effects on trees and soil?
One of the most serious impacts of acid precipitation is on forests and soils. Great damage is done when sulphuric acid falls onto the earth as rain. Nutrients present in the soils are washed away. Aluminium also present in the soils is freed and this toxic element can be absorbed by the roots of trees. Thus, the trees starve to death because they have been deprived of their vital nutrients such as calcium and magnesium.
Acid rain is one of the most serious environmental problems of our time. It is a global problems that is gradually affecting our world.
How does acid rain effect lakes?
Lakes that have been acidified cannot support the same variety of life as healthy lakes. As a lake becomes more acidic, various types of fish disappear. Other effects of acidified lakes on fish include: decreased growth, inability to regulate their own body chemistry, reduced egg deposition, deformities in young fish and increased susceptibility to naturally occurring diseases.
Clean rain usually has a pH of 5.6. It is slightly acidic because of carbon dioxide which is naturally present in the atmosphere. Vinegar, by comparison, is very acidic and has a pH of 3.
What is pH?
This is a measure of how acidic or alkaline a substance is. (See a pH scale below).
The initials pH stand for Potential of Hydrogen. Acids have pH values under 7, and alkalis have pH values over 7. If a substance has a pH value of 7. It is neutral-neither acidic or alkaline.
Because the pH scale is logarithmic, a difference of one pH unit represents a tenfold, or ten times change. For example, the acidity of a sample with a pH of 5 is ten times greater than that of a sample with a pH of 6. A difference of 2 units, from 6 to 4, would mean that the acidity in one hundred times greater, and so on.
(Reinildes Dias. Reading Critically in English, 3rd ed. UFMG 2002. Adaptado.)
It is true that clean rain
Read text III to answer 21 through 25.
Acid rain and… the facts
www.acidrain.org.ca / Oxford Children´s Encyclopedia
What causes acid rain?
Acid rain is caused by air pollution. When fossil fuels such as coal and oil are burned, two gases, sulphur dioxide and nitrogen oxide, are released into the atmosphere. These two pollutants eventually react with the moisture in the air. When this polluted mixture falls onto the ground, it is called acid rain.
Rain measuring between 0 and 5 on the pH scale, is acidic therefore called ACID RAIN.
Acid rain is harmful to the environment. It is hard to control because it may be blown by the wind, falling thousands of kilometers from where it was first formed. For example, much of the acid rain in Canada is caused by smoke from factories and power-stations in the USA. The acid rain in Scandinavia may come from Britain.
What are the effects of acid rain?
Acid rain has many different effects. It has killed fish in the lakes of North America, Scandinavia, Scotland, and Wales. Vast areas of forest in northern and central Europe are dying because of it, while in many European cities statues and stone buildings are being eaten away by the acid. Acid rain corrodes metalwork such as steel bridges and railings; it also attacks some types of concrete. Even the water that we drink is slowly being polluted by acid rain.
What are the effects on trees and soil?
One of the most serious impacts of acid precipitation is on forests and soils. Great damage is done when sulphuric acid falls onto the earth as rain. Nutrients present in the soils are washed away. Aluminium also present in the soils is freed and this toxic element can be absorbed by the roots of trees. Thus, the trees starve to death because they have been deprived of their vital nutrients such as calcium and magnesium.
Acid rain is one of the most serious environmental problems of our time. It is a global problems that is gradually affecting our world.
How does acid rain effect lakes?
Lakes that have been acidified cannot support the same variety of life as healthy lakes. As a lake becomes more acidic, various types of fish disappear. Other effects of acidified lakes on fish include: decreased growth, inability to regulate their own body chemistry, reduced egg deposition, deformities in young fish and increased susceptibility to naturally occurring diseases.
Clean rain usually has a pH of 5.6. It is slightly acidic because of carbon dioxide which is naturally present in the atmosphere. Vinegar, by comparison, is very acidic and has a pH of 3.
What is pH?
This is a measure of how acidic or alkaline a substance is. (See a pH scale below).
The initials pH stand for Potential of Hydrogen. Acids have pH values under 7, and alkalis have pH values over 7. If a substance has a pH value of 7. It is neutral-neither acidic or alkaline.
Because the pH scale is logarithmic, a difference of one pH unit represents a tenfold, or ten times change. For example, the acidity of a sample with a pH of 5 is ten times greater than that of a sample with a pH of 6. A difference of 2 units, from 6 to 4, would mean that the acidity in one hundred times greater, and so on.
(Reinildes Dias. Reading Critically in English, 3rd ed. UFMG 2002. Adaptado.)
A difference of four units, from six to two, means that the acidity is
Read text III to answer 21 through 25.
Acid rain and… the facts
www.acidrain.org.ca / Oxford Children´s Encyclopedia
What causes acid rain?
Acid rain is caused by air pollution. When fossil fuels such as coal and oil are burned, two gases, sulphur dioxide and nitrogen oxide, are released into the atmosphere. These two pollutants eventually react with the moisture in the air. When this polluted mixture falls onto the ground, it is called acid rain.
Rain measuring between 0 and 5 on the pH scale, is acidic therefore called ACID RAIN.
Acid rain is harmful to the environment. It is hard to control because it may be blown by the wind, falling thousands of kilometers from where it was first formed. For example, much of the acid rain in Canada is caused by smoke from factories and power-stations in the USA. The acid rain in Scandinavia may come from Britain.
What are the effects of acid rain?
Acid rain has many different effects. It has killed fish in the lakes of North America, Scandinavia, Scotland, and Wales. Vast areas of forest in northern and central Europe are dying because of it, while in many European cities statues and stone buildings are being eaten away by the acid. Acid rain corrodes metalwork such as steel bridges and railings; it also attacks some types of concrete. Even the water that we drink is slowly being polluted by acid rain.
What are the effects on trees and soil?
One of the most serious impacts of acid precipitation is on forests and soils. Great damage is done when sulphuric acid falls onto the earth as rain. Nutrients present in the soils are washed away. Aluminium also present in the soils is freed and this toxic element can be absorbed by the roots of trees. Thus, the trees starve to death because they have been deprived of their vital nutrients such as calcium and magnesium.
Acid rain is one of the most serious environmental problems of our time. It is a global problems that is gradually affecting our world.
How does acid rain effect lakes?
Lakes that have been acidified cannot support the same variety of life as healthy lakes. As a lake becomes more acidic, various types of fish disappear. Other effects of acidified lakes on fish include: decreased growth, inability to regulate their own body chemistry, reduced egg deposition, deformities in young fish and increased susceptibility to naturally occurring diseases.
Clean rain usually has a pH of 5.6. It is slightly acidic because of carbon dioxide which is naturally present in the atmosphere. Vinegar, by comparison, is very acidic and has a pH of 3.
What is pH?
This is a measure of how acidic or alkaline a substance is. (See a pH scale below).
The initials pH stand for Potential of Hydrogen. Acids have pH values under 7, and alkalis have pH values over 7. If a substance has a pH value of 7. It is neutral-neither acidic or alkaline.
Because the pH scale is logarithmic, a difference of one pH unit represents a tenfold, or ten times change. For example, the acidity of a sample with a pH of 5 is ten times greater than that of a sample with a pH of 6. A difference of 2 units, from 6 to 4, would mean that the acidity in one hundred times greater, and so on.
(Reinildes Dias. Reading Critically in English, 3rd ed. UFMG 2002. Adaptado.)
The item that does NOT relate to the text issues is
Read text IV to answer 26 through 30.
Invitation for Bids (IFB)
1. The ECOWAS COMMISSION has allocated own funds towards the cost of the Supply, Deployment & Installation of Network Equipment at the ECOWAS Commission Headquarters Data Centre, Abuja.
2. The ECOWAS Commission therefore invites sealed bids for the Supply, Deployment & Installation of Network Equipment at the ECOWAS Commission Headquarters Data Centre, Abuja described above in one lot.
3. The Bidding Document can be obtained at the Procurement Division, Directorate of General Administration, ECOWAS Commission, Plot 101, Yakubu Gowon Crescent, Asokoro District, Abuja, Nigeria, upon submission of a written request and payment of three hundred US Dollars (US$300.00) by Cash or Bank Draft made in favour of ECOWAS Commission, Abuja.
4. For Bidders outside Nigeria, the Bidding Document can be mailed to interested Bidders upon payment (by Transfer) of non-refundable fee of US$300.00 to the Commission (transfer charges born by the bidder). (Account Details available on request.)
5. Interested Bidders may obtain further information at the address below, during office hours: Monday to Friday from 9.00am (8.00am GMT+1) to 4.00pm (3.00pm GMT+1), ECOWAS Commission, Directorate of General Administration, Procurement Division, 1st Floor, Plot 101, Yakubu Gowon Crescent, Asokoro District, PMB 401 Abuja Nigeria.
E-mail: [email protected]
6. Bids shall be valid for a period of 120 (days) after Bid Opening and must be accompanied by a bid security of US$20,000.00 (Bank Guarantee or Insurance Bond).
7. Bids shall be delivered in sealed envelope and deposited in the ECOWAS Tender Box located Office of the Executive Assistant of Commissioner of Administration & Finance, fifth (5th) floor of the ECOWAS Commission Building, 101, Yakubu Gowon Crescent Asokoro District, P. M. B. 401, Abuja, Nigeria on or before November 7, 2013 at 11.30am (10.30am GMT+1) and clearly marked “International Competitive Bidding for the Production of ECOWAS Biometric Laissez Passer and Supply of Equipment” Do Not Open, Except in Presence of the Committee.
8. Bids will be opened in the presence of the bidders who wish to attend on November 7, 2013 at 12.00 noon (11.00am GMT+1), Room 523, Ecowas Commission, Abuja, Nigeria.
(The Economist, September 4th, 2013. Page 86. Adaptado.)
It is true about the text that
Read text IV to answer 26 through 30.
Invitation for Bids (IFB)
1. The ECOWAS COMMISSION has allocated own funds towards the cost of the Supply, Deployment & Installation of Network Equipment at the ECOWAS Commission Headquarters Data Centre, Abuja.
2. The ECOWAS Commission therefore invites sealed bids for the Supply, Deployment & Installation of Network Equipment at the ECOWAS Commission Headquarters Data Centre, Abuja described above in one lot.
3. The Bidding Document can be obtained at the Procurement Division, Directorate of General Administration, ECOWAS Commission, Plot 101, Yakubu Gowon Crescent, Asokoro District, Abuja, Nigeria, upon submission of a written request and payment of three hundred US Dollars (US$300.00) by Cash or Bank Draft made in favour of ECOWAS Commission, Abuja.
4. For Bidders outside Nigeria, the Bidding Document can be mailed to interested Bidders upon payment (by Transfer) of non-refundable fee of US$300.00 to the Commission (transfer charges born by the bidder). (Account Details available on request.)
5. Interested Bidders may obtain further information at the address below, during office hours: Monday to Friday from 9.00am (8.00am GMT+1) to 4.00pm (3.00pm GMT+1), ECOWAS Commission, Directorate of General Administration, Procurement Division, 1st Floor, Plot 101, Yakubu Gowon Crescent, Asokoro District, PMB 401 Abuja Nigeria.
E-mail: [email protected]
6. Bids shall be valid for a period of 120 (days) after Bid Opening and must be accompanied by a bid security of US$20,000.00 (Bank Guarantee or Insurance Bond).
7. Bids shall be delivered in sealed envelope and deposited in the ECOWAS Tender Box located Office of the Executive Assistant of Commissioner of Administration & Finance, fifth (5th) floor of the ECOWAS Commission Building, 101, Yakubu Gowon Crescent Asokoro District, P. M. B. 401, Abuja, Nigeria on or before November 7, 2013 at 11.30am (10.30am GMT+1) and clearly marked “International Competitive Bidding for the Production of ECOWAS Biometric Laissez Passer and Supply of Equipment” Do Not Open, Except in Presence of the Committee.
8. Bids will be opened in the presence of the bidders who wish to attend on November 7, 2013 at 12.00 noon (11.00am GMT+1), Room 523, Ecowas Commission, Abuja, Nigeria.
(The Economist, September 4th, 2013. Page 86. Adaptado.)
A bid security
Read text IV to answer 26 through 30.
Invitation for Bids (IFB)
1. The ECOWAS COMMISSION has allocated own funds towards the cost of the Supply, Deployment & Installation of Network Equipment at the ECOWAS Commission Headquarters Data Centre, Abuja.
2. The ECOWAS Commission therefore invites sealed bids for the Supply, Deployment & Installation of Network Equipment at the ECOWAS Commission Headquarters Data Centre, Abuja described above in one lot.
3. The Bidding Document can be obtained at the Procurement Division, Directorate of General Administration, ECOWAS Commission, Plot 101, Yakubu Gowon Crescent, Asokoro District, Abuja, Nigeria, upon submission of a written request and payment of three hundred US Dollars (US$300.00) by Cash or Bank Draft made in favour of ECOWAS Commission, Abuja.
4. For Bidders outside Nigeria, the Bidding Document can be mailed to interested Bidders upon payment (by Transfer) of non-refundable fee of US$300.00 to the Commission (transfer charges born by the bidder). (Account Details available on request.)
5. Interested Bidders may obtain further information at the address below, during office hours: Monday to Friday from 9.00am (8.00am GMT+1) to 4.00pm (3.00pm GMT+1), ECOWAS Commission, Directorate of General Administration, Procurement Division, 1st Floor, Plot 101, Yakubu Gowon Crescent, Asokoro District, PMB 401 Abuja Nigeria.
E-mail: [email protected]
6. Bids shall be valid for a period of 120 (days) after Bid Opening and must be accompanied by a bid security of US$20,000.00 (Bank Guarantee or Insurance Bond).
7. Bids shall be delivered in sealed envelope and deposited in the ECOWAS Tender Box located Office of the Executive Assistant of Commissioner of Administration & Finance, fifth (5th) floor of the ECOWAS Commission Building, 101, Yakubu Gowon Crescent Asokoro District, P. M. B. 401, Abuja, Nigeria on or before November 7, 2013 at 11.30am (10.30am GMT+1) and clearly marked “International Competitive Bidding for the Production of ECOWAS Biometric Laissez Passer and Supply of Equipment” Do Not Open, Except in Presence of the Committee.
8. Bids will be opened in the presence of the bidders who wish to attend on November 7, 2013 at 12.00 noon (11.00am GMT+1), Room 523, Ecowas Commission, Abuja, Nigeria.
(The Economist, September 4th, 2013. Page 86. Adaptado.)
The ECOWAS Commission is inviting bids for a(an)
Read text IV to answer 26 through 30.
Invitation for Bids (IFB)
1. The ECOWAS COMMISSION has allocated own funds towards the cost of the Supply, Deployment & Installation of Network Equipment at the ECOWAS Commission Headquarters Data Centre, Abuja.
2. The ECOWAS Commission therefore invites sealed bids for the Supply, Deployment & Installation of Network Equipment at the ECOWAS Commission Headquarters Data Centre, Abuja described above in one lot.
3. The Bidding Document can be obtained at the Procurement Division, Directorate of General Administration, ECOWAS Commission, Plot 101, Yakubu Gowon Crescent, Asokoro District, Abuja, Nigeria, upon submission of a written request and payment of three hundred US Dollars (US$300.00) by Cash or Bank Draft made in favour of ECOWAS Commission, Abuja.
4. For Bidders outside Nigeria, the Bidding Document can be mailed to interested Bidders upon payment (by Transfer) of non-refundable fee of US$300.00 to the Commission (transfer charges born by the bidder). (Account Details available on request.)
5. Interested Bidders may obtain further information at the address below, during office hours: Monday to Friday from 9.00am (8.00am GMT+1) to 4.00pm (3.00pm GMT+1), ECOWAS Commission, Directorate of General Administration, Procurement Division, 1st Floor, Plot 101, Yakubu Gowon Crescent, Asokoro District, PMB 401 Abuja Nigeria.
E-mail: [email protected]
6. Bids shall be valid for a period of 120 (days) after Bid Opening and must be accompanied by a bid security of US$20,000.00 (Bank Guarantee or Insurance Bond).
7. Bids shall be delivered in sealed envelope and deposited in the ECOWAS Tender Box located Office of the Executive Assistant of Commissioner of Administration & Finance, fifth (5th) floor of the ECOWAS Commission Building, 101, Yakubu Gowon Crescent Asokoro District, P. M. B. 401, Abuja, Nigeria on or before November 7, 2013 at 11.30am (10.30am GMT+1) and clearly marked “International Competitive Bidding for the Production of ECOWAS Biometric Laissez Passer and Supply of Equipment” Do Not Open, Except in Presence of the Committee.
8. Bids will be opened in the presence of the bidders who wish to attend on November 7, 2013 at 12.00 noon (11.00am GMT+1), Room 523, Ecowas Commission, Abuja, Nigeria.
(The Economist, September 4th, 2013. Page 86. Adaptado.)
In “Bids will be opened in the presence of bidders who wish...” the relative pronoun may be replaced by
Read text IV to answer 26 through 30.
Invitation for Bids (IFB)
1. The ECOWAS COMMISSION has allocated own funds towards the cost of the Supply, Deployment & Installation of Network Equipment at the ECOWAS Commission Headquarters Data Centre, Abuja.
2. The ECOWAS Commission therefore invites sealed bids for the Supply, Deployment & Installation of Network Equipment at the ECOWAS Commission Headquarters Data Centre, Abuja described above in one lot.
3. The Bidding Document can be obtained at the Procurement Division, Directorate of General Administration, ECOWAS Commission, Plot 101, Yakubu Gowon Crescent, Asokoro District, Abuja, Nigeria, upon submission of a written request and payment of three hundred US Dollars (US$300.00) by Cash or Bank Draft made in favour of ECOWAS Commission, Abuja.
4. For Bidders outside Nigeria, the Bidding Document can be mailed to interested Bidders upon payment (by Transfer) of non-refundable fee of US$300.00 to the Commission (transfer charges born by the bidder). (Account Details available on request.)
5. Interested Bidders may obtain further information at the address below, during office hours: Monday to Friday from 9.00am (8.00am GMT+1) to 4.00pm (3.00pm GMT+1), ECOWAS Commission, Directorate of General Administration, Procurement Division, 1st Floor, Plot 101, Yakubu Gowon Crescent, Asokoro District, PMB 401 Abuja Nigeria.
E-mail: [email protected]
6. Bids shall be valid for a period of 120 (days) after Bid Opening and must be accompanied by a bid security of US$20,000.00 (Bank Guarantee or Insurance Bond).
7. Bids shall be delivered in sealed envelope and deposited in the ECOWAS Tender Box located Office of the Executive Assistant of Commissioner of Administration & Finance, fifth (5th) floor of the ECOWAS Commission Building, 101, Yakubu Gowon Crescent Asokoro District, P. M. B. 401, Abuja, Nigeria on or before November 7, 2013 at 11.30am (10.30am GMT+1) and clearly marked “International Competitive Bidding for the Production of ECOWAS Biometric Laissez Passer and Supply of Equipment” Do Not Open, Except in Presence of the Committee.
8. Bids will be opened in the presence of the bidders who wish to attend on November 7, 2013 at 12.00 noon (11.00am GMT+1), Room 523, Ecowas Commission, Abuja, Nigeria.
(The Economist, September 4th, 2013. Page 86. Adaptado.)
A written request will be needed to
Considere verdadeiras as seguintes premissas:
• p1: se a energia nuclear for uma alternativa de obtenção de energia pouco poluente, então, sua utilização crescerá a cada dia;
• p2: se uma usina nuclear for instalada perto de um centro consumidor, então, o custo de distribuição de energia será reduzido;
• p3: a utilização de energia nuclear vem crescendo a cada dia;
• p4: uma usina nuclear foi instalada próximo a um centro consumidor.
Conclui-se, a partir do argumento apresentado, que
Considere as seguintes proposições lógicas:
• p: a conferência foi um sucesso, mas os representantes não gostaram da proposta;
• q: ou ampliam-se os investimentos no setor, ou os projetos não serão implantados.
Diante do exposto, é correto afirmar que
Dentre o número de anagramas que podem ser formados com as letras da palavra ENERGIA, a probabilidade de se selecionar, ao acaso, um anagrama cujas consoantes “NRG” aparecem sempre juntas e nessa ordem é
Considere a seguinte sequência lógica numérica:
4, 2, 6, 4, 12, 10 ...
É correto afirmar que o próximo termo da sequência será
180 pessoas realizaram uma prova que continha duas disciplinas, A e B. Sabe-se que: 25 pessoas acertaram todas as questões da disciplina B; 31 pessoas acertaram todas as questões da disciplina A; e, 11 pessoas acertaram todas as questões da prova, isto é, todas as questões das disciplinas A e B. Assim, selecionando-se ao acaso uma pessoa, a probabilidade de esta ter acertado todas as questões em pelo menos uma prova é
Em 2014, o Dia Internacional da Mulher, 8 de março, ocorreu em um sábado. Maria realizou uma prova exatamente 25 semanas após o dia 8 de março do ano de 2012. Dessa forma, essa prova caiu em um(a)
A soma dos nove termos de uma progressão aritmética é igual a 72. Sabe-se que a razão r da progressão é igual a 3. Logo, sendo P o quinto termo dessa progressão, é correto afirmar que
Desde a descoberta dos raios-x, pesquisadores perceberam que a radiação ionizante poderia ser muito perigosa. Estudos mostraram que os efeitos biológicos decorrentes da exposição que o organismo humano pode sofrer, ao entrar em contato com a radiação ionizante, são decorrentes da interação da radiação com os átomos e as moléculas das células expostas. Devido a essa exposição, o CNEN estipulou limites de doses que um indivíduo deve estar exposto. Qual é o limite de doses anuais para as mãos e os pés de um indivíduo ocupacional exposto?
Só é possível se referir à intensidade da radiação ionizante, quando se conhece as grandezas e as unidades que a representam. A necessidade desse conhecimento se tornou evidente desde o início do estudo das radiações (final do século XIX). As grandezas utilizadas para os limites de dose denominam-se grandezas de limitação de dose. Apesar de serem calculáveis, essas grandezas não são mensuráveis. Entretanto, podem ser estimadas a partir de grandezas de dosimetria. Analise-as.
I. Dose equivalente (HT) é a grandeza que leva em consideração a qualidade da radiação. A unidade no sistema internacional é o joule por quilograma (J/kg) denominada sievert (Sv).
II. Kerma de entrada na superfície (Ke) somente inclui a radiação incidente e não a radiação retroespalhada. Unidade: J/kg ou gray (Gy).
III. Equivalente de dose pessoal (Hp(d)) é uma grandeza operacional definida como o equivalente de dose em tecido mole. Unidade: J/kg ou sievert (Sv).
IV. Kerma no ar incidente (Ki) somente inclui radiação incidente no paciente ou fantoma, e a radiação retroespalhada é incluída na definição. Unidade: J/kg ou gray (Gy).
V. Dose efetiva (E) é definida como a soma ponderada das doses equivalentes em todos os tecidos ou órgãos do corpo; se expressa, também, em sievert (Sv).
Estão corretas apenas as afirmativas
Pesquisas com DNA verificaram que essas moléculas podem sofrer danos por radiação pela produção de íons e deposição da energia em sua estrutura. Além disso, foi constatado que a quantidade do dano biológico produzido depende da energia total depositada, ou seja, a dose de radiação. Os efeitos das radiações são descritos através dos estudos de radiobiologia, em que são estabelecidas relações de dose/efeito. Os efeitos da exposição à radiação são proporcionais à dose recebida, podendo ser alta ou baixa, sendo conhecidos por: estocásticos e determinísticos. Assinale a alternativa que apresenta apenas características dos efeitos determinísticos da radiação ionizante.
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