If 137+276=435 how much is 731+672

1.  534

2.  1403

3.  1623

4.  1513

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4
Correct Answer :

1623


Explanation :
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1.  

2.  

3.  

4.  

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4
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Explanation :
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1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
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If  threecoins are tossed simultaneously,  the probability of getting  at least one head

1.  1/8

2.  3/8

3.  ½

4.  7/8

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4
Correct Answer :

7/8


Explanation :
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If  a  closed  system  is  undergoing  an  irreversible  process,  the  entropy  of  the system  

1.  Must increase

2.  Always remains constant

3.  Must decrease

4.  Can increase, decrease or remain constant

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4
Correct Answer :

Must increase


Explanation :
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A  coolant  fluid  at  30°C  flows  over  a  heated  flat  plate  maintained  at  a  constant temperature  of  100°C.  The boundary layer temperature distribution at a given location on the plate may be approximated as T=30+70 exp(-Y) where y ( in m) is the distance normal to the plate and T  is in  °C. If thermal conductivity of the fluid is 1.0W/mK, the local convective heat transfer coefficient (in W/m2K) at the location will be

1.  0.2

2.  1

3.  5

4.  10

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4
Correct Answer :

1


Explanation :
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A frictionless piston-cylinder device contains a gas initially at 0.8MPa and 0.015 m3. It expands quasi-statically at constant temperature t o a final volume of 0.030 m3. The work output (in kJ) during this process will be

1.  8.32

2.  12.00

3.  554.67

4.  8320.00

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4
Correct Answer :

8.32


Explanation :
No Explanation available for this question

In  an  ideal  vapour  compression  refrigeration  cycle,  the  specific  enthalpy  of Refrigerant (in kJ/kg) at  the following states is given as Inlet of condenser:   283 Exit of condenser:   116 Exit of evaporator:   232 The COP of this cycle is

1.  2.27

2.  2.75

3.  3.27

4.   3.75

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4
Correct Answer :

2.27


Explanation :
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A  compressor undergoes  a reversible,  steady  flow  process. The gas at inlet and outlet  of  the  compressor  is  designated  as  state  1  and  state  2  respectively. Potential  and  kinetic  energy changes  are  to be  ignored.  The following notations are used: v= specific volume and P=pressure of the gas The  specific  work  required  to  be  supplied  to  the  compressor  for  this  gas compression process is

1.  

2.  

3.  V1(P2-P1)

4.  - P2(V1-V2)

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4
Correct Answer :


Explanation :
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A block weighing  981N  is  resting  on  a  horizontal  surface.  The coefficient of friction between  the  block  and t he  horizontal  surface  is µ= 0.2 A vertical cable  attached  to  the  block  provides  partial  support  as  shown.  A man can pull horizontal with a force of 100 N. What will be the tension, T (in N) in the cable if the man is just able to move the block to the right

1.  176.2

2.  196.0

3.  481.0

4.  981.0

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4
Correct Answer :

481.0


Explanation :
No Explanation available for this question
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