A bar is subjected to fluctuating tensile load from 20 kN to 100 kN.  The material has  yield  strength  of  240 MPa  and  endurance  limit  in  reversed  bending  is  160 MPa.   According  to  the Soderberg principle,  the area of  cross-section  in mm2 of the bar for a factor of safety of 2 is

1.  400

2.  600

3.  750

4.  1000

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4
Correct Answer :

1000


Explanation :
No Explanation available for this question

A  simply  supported  beam  of  length  L  is  subjected  to  a  varying  distributed  load where  the  distance  x  is measured  from  the  left  support.    The magnitude of the vertical force in N at the left support is

1.  Zero

2.  L/3π

3.  L/π

4.  2L/π

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4
Correct Answer :

L/3π


Explanation :
No Explanation available for this question

Two  large  diffuse  gray  parallel  plates,  separated  by  a  small  distance,  have surface temperatures of 400 K and 300 K.  If the emissivities of the surfaces are 0.8 and the Stefan-Boltzmann constant  is 5.67x10-8 W/m2K4, the net radiation heat exchange rate in kW/m2  between the two plates is

1.  0.66

2.  0.79

3.  0.99

4.  3.96

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4
Correct Answer :

0.66


Explanation :
No Explanation available for this question

A hinged gate of  length 5 m,  inclined at  30° with  the horizontal and with water mass on its left, is shown in figure below.  Density of water is 1000 kg/m2.  The minimum mass  of  the  gate  in  kg  per  unit width  (perpendicular  to  the  plane  of paper), required to keep it closed is

1.  5000

2.  6600

3.  7546

4.  9623

View Answer  
4
Correct Answer :

9623


Explanation :
No Explanation available for this question

The pressure, temperature and velocity of air flowing in a pipe are 5 bar, 500 K and 50 m/s,  respectively.   The specific heats of air at constant pressure and at constant  volume  are  1.005  kJ/kgK  and  0.718  kJ/kgK,  respectively.    Neglect potential energy.  If the pressure and temperature of the surroundings are 1 bar and 300 K, respectively, the available energy in kJ/kg of the air stream is

1.  170

2.  187

3.  191

4.  213

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4
Correct Answer :

187


Explanation :
No Explanation available for this question

The  probability  that  a  student  knows  the  correct  answer  to  a  multiple  choice question  is 2/3. If  the  student  does  not  know  the  answer,  then  the  student guesses the answer.   The probability of the guessed answer being correct  is 1/4 . Given  that  the  student  has  answered  the  question  correctly,  the  conditional probability that the student known the correct answer is

1.  2/3

2.  3/4

3.  5/6

4.  8/9

View Answer  
4
Correct Answer :

8/9


Explanation :
No Explanation available for this question

The  solution  to  the  differential  equation , where  k  is  a  constant, subjected to the boundary conditions u(0)=0 and u(L)=U, is

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
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The value of the definite integra is

1.  

2.  

3.  

4.  

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question

Complete the sentence:   Universalism is to particularism as diffuseness is to ________

1.  specificity

2.  neutrality

3.  generality

4.  adaptation

View Answer  
4
Correct Answer :

specificity


Explanation :
No Explanation available for this question

Were you a bird, you ___________ in the sky

1.  would fly

2.  shall fly

3.  should fly

4.  shall have flown

View Answer  
4
Correct Answer :

would fly


Explanation :
No Explanation available for this question
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