The temperature variation under  steady heat conduction across  a composite slab of  two materials  with  thermal  conductivities   K1 and K2 is shown in figure.2.12. Then, which one of the following statements holds

1.  K1 > K2

2.  K1 = K2

3.  K1 =0

4.  K1 < K2

View Answer  
4
Correct Answer :

K1 < K2


Explanation :
No Explanation available for this question

The earth can be assumed as a uniform sphere. Suppose the earth shrinks by 1% in diameter, the new day period

1.  will not change from 24 hours

2.  will reduce by about 2%

3.  will reduce by about 1%

4.  will increase by about 1%

View Answer  
4
Correct Answer :

will increase by about 1\%


Explanation :
No Explanation available for this question

Pertaining to a steam boiler, pick the correct statement among the following:

1.  Primary boiler heat surfaces include evaporator section, economizer and air preheater

2.  Primary boiler heat transfer surfaces include evaporator section, super heater section and economizer

3.  Secondary boiler heat transfer surfaces include super heater, economizer and air preheater

4.  Primary boiler heat transfer surfaces include evaporator section, super heater section and reheat section

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4
Correct Answer :

Secondary boiler heat transfer surfaces include super heater, economizer and air preheater


Explanation :
No Explanation available for this question

Consider the triangle formed by the connecting rod and the crank of an IC engine as the two sides of the triangle. If the maximum area of this triangle occurs when the crank angle is75°, the ratio of connecting rod length to crank radius is:

1.  5

2.  4

3.  3.73

4.  3

View Answer  
4
Correct Answer :

3.73


Explanation :
No Explanation available for this question

The  difference  between  tensions  on  the  tight  and  slack  sides  of  a  belt  drive  is 3000 N. If the belt speed is 15 m/s, the transmitted power in kW is

1.  45

2.  22.5

3.  90

4.  100

View Answer  
4
Correct Answer :

45


Explanation :
No Explanation available for this question

The  profile  of  a  cam  in  a  particular  zone  is  given x= √3 cos θ  and y= sin θ. The normal to the cam profile at θ=π/4 is at an angle (with respect to x axis):

1.  π/4

2.  π/2

3.  π/3

4.  0

View Answer  
4
Correct Answer :

π/3


Explanation :
No Explanation available for this question

In an orthogonal machining operation, the chip thickness and the uncut thickness are equal to 0.45 mm. If the tool rake angle is 0°, the shear plane angle is

1.  45°

2.  30°

3.  18°

4.  60°

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4
Correct Answer :

45°


Explanation :
No Explanation available for this question

A strip with a cross-section 150 mm×4.5 mm is being rolled with 20% reduction of area  using  450  mm  diameter  rolls.  The angle subtended by the deformation zone at the roll centre is (in radius):

1.  0.01

2.  0.02

3.  0.03

4.  0.06

View Answer  
4
Correct Answer :

0.06


Explanation :
No Explanation available for this question

A flywheel of moment of inertia 9.8 kg m2 fluctuates by 30 rpm for a fluctuation in energy of 1936 Joules. The mean speed of the flywheel is (rpm)

1.  600

2.  900

3.  968

4.  2940

View Answer  
4
Correct Answer :

600


Explanation :
No Explanation available for this question

If Y= |x| for x < 0 and Y = x for x > 0, then

1.  dy/dx is discontinuous at x = 0 dx

2.   y is discontinuous at x = 0

3.  y is not defined at x = 0

4.  both Y and dy/dx are discontinuous at x=0

View Answer  
4
Correct Answer :

dy/dx is discontinuous at x = 0 dx


Explanation :
No Explanation available for this question
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