1
GATE ME 2012
MCQ (Single Correct Answer)
+1
-0.3
For an opaque surface, the absorptivity $$\left( \alpha \right),$$ transmissivity $$\left( \tau \right)$$ and reflectivity $$\left( \rho \right)$$ are related by the equation:
A
$$\alpha + \rho = \tau $$
B
$$\rho + \alpha + \tau = 0$$
C
$$\alpha + \rho = 1$$
D
$$\alpha + \rho = 0$$
2
GATE ME 2012
MCQ (Single Correct Answer)
+2
-0.6
Consider two infinitely long thin concentric tubes of circular cross section as shown in the figure. If $${D_1}$$ and $${D_2}$$ are the diameters of the inner and outer tubes respectively, then the view factor $${F_{22}}$$ is given by GATE ME 2012 Heat Transfer - Radiation Question 14 English
A
$$\left( {{{{D_2}} \over {{D_1}}}} \right) - 1$$
B
Zero
C
$$\left( {{{{D_1}} \over {{D_2}}}} \right)$$
D
$$1 - \left( {{{{D_1}} \over {{D_2}}}} \right)$$
3
GATE ME 2012
MCQ (Single Correct Answer)
+2
-0.6
Water $$\left( {{C_p} = 4.18\,kJ/kg.K} \right)$$ at $${80^ \circ }C$$ enters a counter flow heat exchanger with a mass flow rate of $$0.5kg/s.$$ Air $$\left( {{C_p} = 1\,kJ/kg.\,K} \right)$$ enters at $${80^ \circ }C$$ with a mass flow rate $$2.09$$ $$kg/s.$$ If the effectiveness of the heat exchanger is $$0.8,$$ the $$LMTD$$ (in $$^ \circ C$$) is
A
$$40$$
B
$$20$$
C
$$10$$
D
$$5$$
4
GATE ME 2012
MCQ (Single Correct Answer)
+2
-0.6
For a particular project, eight activities are to be carried out. Their relationships with other activities and expected durations are mentioned in the table below. GATE ME 2012 Industrial Engineering - Pert and Cpm Question 14 English

The critical path for the project is

A
$$a-b-e-g-h$$
B
$$a-c-g-h$$
C
$$a-d-f-h$$
D
$$a-b-c-f-h$$
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