# The properties of mercury at 300 K are: density = 13529 kg/m3, specific heat atconstant pressure = 0.1393 kJ/kg-K, dynamic viscosity =0.1523x10-2 N.s/m2 and thermalConductivity =8.540 W/m-K. The Prandtl number of the mercury at 300 K is

1.  0.0248

2.  2.48

3.  24.8

4.  248

4

0.0248

Explanation :
No Explanation available for this question

# What is the value of the view factor for two inclined flat having common edge of equalwidth, and with an angle of 20 degrees

1.  0.83

2.  1.17

3.  0.66

4.  1.34

4

0.66

Explanation :
No Explanation available for this question

# A Carnot cycle is having an efficiency of 0.75. If the temperature of the high temperaturereservoir is 727 C, what is the temperature of low temperature reservoir

1.  23 C

2.   -23 C

3.  0 C

4.   250 C

4

-23 C

Explanation :
No Explanation available for this question

# An ideal air standard Otto cycle has a compression ratio of 8.5. If the ratio of the specificheats of air (a’) is 1.4, what is the thermal efficiency (in percentage) of the Otto cycle

1.  57.5

2.  45.7

3.  52.5

4.  95

4

57.5

Explanation :
No Explanation available for this question

# What is the speed of sound in Neon gas at a temperature of 500K (Gas constant of Neonis 0.4210 kJ/kg-K)

1.  492 m/s

2.   460 m/s

3.   592 m/s

4.  543 m/s

4

543 m/s

Explanation :
No Explanation available for this question

# The efficiency of superheat Rankine cycle is higher than that of simple Rankine cycle because

1.  The enthalpy of main stream is higher for superheat cycle

2.  The mean temperature of heat addition is higher for superheat cycle

3.  The temperature of steam in the condenser is high

4.  The quality of steam in the condenser is low

4

The mean temperature of heat addition is higher for superheat cycle

Explanation :
No Explanation available for this question

# is

1.

2.  3

3.   0

4.  1

4

3

Explanation :
No Explanation available for this question

# Consider the system of equations given below: x + y = 2 2x + 2y = 5 This system has

1.   One solution

2.  No solution

3.  Infinite solutions

4.  Four solutions

4

No solution

Explanation :
No Explanation available for this question

# What is the derivative of f (z) = x at x = 0

1.  1

2.  -1

3.  0

4.  Does not exist

4

Does not exist

Explanation :
No Explanation available for this question

# The Gauss divergence theorem relates certain

1.  Surface integrals to volume integrals

2.  Surface integrals to line integrals

3.  Vector quantities to other vector quantities

4.  line integrals to volume integral

4