Civil Engineering - Hydraulics - Discussion

1. 

For exerting a pressure of 4.8 kg/cm2, the depth of oil (specific gravity 0.8), should be

[A]. 40 cm
[B]. 41 cm
[C]. 56 cm
[D]. 60 cm
[E]. 76 cm.

Answer: Option D

Explanation:

No answer description available for this question.

Brijendra said: (Jan 21, 2014)  
P=WH, H=P/W, H=48/.8=60.

Rashid said: (Apr 30, 2016)  
Hi, @Brijendra.

How you take 4.8 as 48?

Binktesh Kumar said: (Sep 4, 2016)  
Hello, @Brijendra.

How you take pressure 4.8 to 48?

Shubham said: (Sep 8, 2016)  
@Brijendra.

Tell me how you converted 4.8 to 48?

Honey said: (Oct 2, 2016)  
Here, it is converted it in newton by multiplying 10.

Another way to do it is, 1st convert 4.8kg/cm2 into kg/m2 by multiplying it with 10000.
Ten again multiply by 10 to get in N/m2, then find out the specific weight.
=> 8 * 1000 * 10 now divide 480000/8000.
You will get 60 as an answer.

Disha said: (Oct 12, 2016)  
Explain briefly!

Sasi said: (Jan 29, 2017)  
Pressure = W * H.
4.8 * 10^3 = sp. grvty * dnsty * H.
4800 = 0.8 * 1* H.
H = 6000cm = 60m.

Rind said: (Feb 11, 2017)  
H = p/w.
= 48/.8,
= 60.

Abhishek Anand said: (Feb 13, 2017)  
Answer must be 60m. I agree.

Bastard said: (Apr 20, 2017)  
PRESSURE=(UNIT WT.)*(HEIGHT).

4.8 = (0.8)*(1000/100^3)*(H),
H = 6000 cm.
H = 60 m.

Bibek said: (Jul 14, 2017)  
Answer 60 m is correct. I agree.

Sanjay said: (Aug 17, 2017)  
Yes, they all are right, the answer must be in a meter.

Manish said: (Jan 8, 2018)  
@ALL.

P=4.8kg/cm^2---> (1)
Now we know that 1kg=10N, put in---> (1)
P=48N/cm^2.
W=.8.
Now calculate hight by formula-P=w.h.
And get answer 60 cm.

Sadulla Ahmed said: (Dec 22, 2018)  
Yes, it's 60m. I agree.

Khalid Raza said: (Dec 30, 2018)  
P = 4.8kg/cm^2---> (1)
Now we know that 1kg=10N, put in---> (1)

P=48N/cm^2.
W=.8.
Now calculate hight by formula-P=w.h.
And get answer 60 cm.

Ramyahegde said: (Feb 19, 2019)  
P = wh.
w = 1 g/cc = 1000kg/cc.
P = 4.8kg/cm^2 = 4.8 * 10^4 kg/m^2.
4.8 * 10^4 = 0.8 * 1000 vh.
48 = 0.8h.
h = 48/0.8.
h = 60m.

Spsiro said: (Jul 21, 2019)  
(4.8*10000*10)/(.8*1000*10) = 60m is the correct answer.

Sumanta said: (Oct 2, 2019)  
It should be 60 m not 60 cm.

Bhim said: (Apr 4, 2020)  
It should be 60m not 60cm.

Vim said: (Apr 27, 2020)  
P= 4.8*10^4Kg/m^2.
pressure head= p/y = 4.8*10^4/ 0.8*1000.
= 60m.

Jafar said: (Sep 19, 2020)  
1 kg=9.81 N so P=4.8kg/cm2 which is equal to 4.8 x 9.81 x 10000 N/m2(1m = 100cm).
So now P=w.h where w=spG unit wt of water=0.8 x 9.81.
hence h=60000 cm or 60m.

Masum said: (Nov 16, 2020)  
Yes, it should be 60m.

Nasir Rasool said: (May 10, 2021)  
60m is the right answer.

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