# The bituminous coal is non-caking if its carbon content is

1.  78-81%

2.  81-85%

3.  85-90%

4.  90-95%

4

78-81\%

Explanation :
No Explanation available for this question

# The dry saturated steam at very low pressure,(5-10 kg/cm2) when throttled to atmosphere will become

1.  wet

2.  super-heated

3.  remain dry saturated

4.  dry

4

super-heated

Explanation :
No Explanation available for this question

# Water at pressure of 4 kg/cm2 and 160°C temperature when exposed to atmosphere will

1.  boil

2.  flash i.e. get converted into steam

3.  remain as it was

4.  cool down

4

flash i.e. get converted into steam

Explanation :
No Explanation available for this question

# The dry saturated steam at very high pressure (150-200 kg/cm2) when throttled to atmosphere will become

1.  wet

2.  super-heated

3.  remain dry saturated

4.  dry

4

wet

Explanation :
No Explanation available for this question

# In a throttling process

1.  steam temperature remain constant

2.  steam pressure remains constant

3.  steam enthalpy remains constant

4.  steam entropy remains constant

4

steam enthalpy remains constant

Explanation :
No Explanation available for this question

# In a throttling process

1.  heat transfer takes place

2.  work is done by the expanding steam

3.  internal energy of steam changes

4.  none of the above

4

none of the above

Explanation :
No Explanation available for this question

# The pressure at which latent heat of vaporization of water is zero, is

1.  below atmospheric pressure

2.  1 kg/cm2

3.  100 kg/cm2

4.  225.6kg/cm2

4

225.6kg/cm2

Explanation :
No Explanation available for this question

# Latent heat of dry steam at atmospheric pressure is equal to

1.  539 kcal/kg

2.  539 BTU/lb

3.  427 kcal/kg

4.  100 kcal/kg

4

539 kcal/kg

Explanation :
No Explanation available for this question

# The latent heat of steam with increase of pressure

1.  remains same

2.  increases

3.  decreases

4.  behaves unpredictably

4

decreases

Explanation :
No Explanation available for this question

# At critical point, i.e. p=225.65 kg/cm2, the latent enthalpy of vaporization is

1.  maximum

2.  minimum

3.  zero

4.  depends on temperature also

4