# 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

4

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%

4

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

4

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

4

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

4

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

4

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°

4

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

4

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

4

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

4