Question

An inexpensive fire extinguisher commonly found in most secondary school laboratories in Nigeria is -----------------
sand
detergent
carbon dioxide
carbon tetrachloride
16 Three appliances draw current as follows: 2A, 5A and 10A. If they were all plugged into the same adaptor, what would the maximum current in the adaptor be?
2 A
5 A
10 A
17 A
17 One of these is the most appropriate application of a fire extinguisher
water for class A fire
carbon tetrachloride for class C fire
foam for class D fire
carbon dioxide for class D fire
18 Which of the following may not form part of a modern fire alarm system?
a smoke detection system
a thermal expansion detection system a
a radiation detection system
a heat producing system
19 In the event of a fire outbreak the first thing anybody should do is
call the fire fighters
raise an alarm
look for escape routes
look for the sand bucket

Answer 1

Answer on Question #52280-Physics-Other

An inexpensive fire extinguisher commonly found in most secondary school laboratories in Nigeria is ---

sand

detergent

carbon dioxide

carbon tetrachloride

Answer : carbon dioxide.

16 Three appliances draw current as follows: 2A, 5A and 10A. If they were all plugged into the same adaptor, what would the maximum current in the adaptor be?

2 A

5 A

10 A

17 A

Solution

$$I_{max} = 2A + 5A + 10A = 17A.$$

Answer: 17 A.

17 One of these is the most appropriate application of a fire extinguisher

water for class A fire

carbon tetrachloride for class C fire

foam for class D fire

carbon dioxide for class D fire

Answer : water for class A fire.

18 Which of the following may not form part of a modern fire alarm system?

a smoke detection system

a thermal expansion detection system a

a radiation detection system

a heat producing system

Answer: a heat producing system.

19 In the event of a fire outbreak the first thing anybody should do is

call the fire fighters

raise an alarm

look for escape routes

look for the sand bucket

Answer: call the fire fighters.

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