On Moeller chart, flow through turbine is represented by :
A. horizontal straight line
B. vertical straight line
C. straight inclined line
D. curved line
E. none of the above
On Moeller chart, the constant pressure lines :
A. diverge from left to right
B. diverge from right to left
C. are equally spaced throughout
D. first rise up and then fall
E. none of the above
The bituminous coal is non-caking if its carbon content is :
A. 78-81%
B. 81-85%
C. 85-90%
D. 90-95%
E. 95-100%.
In a throttling process :
A. steam temperature remains constant
B. steam pressure remains constant
C. steam enthalpy remains constant
D. steam entropy remains constant
E. steam volume remains constant
The pressure at which latent heat of vaporisation of water is zero, is :
A. below atmospheric pressure
B. 1 kg/cm2
C. 100 kg/cm2
D. 170 kg/cm2
E. 225.6 kg/cm2
The latent heat of steam with increase of pressure :
A. remains same
B. increases
C. decreases
D. behaves unpredictably
E. none of the above
Adiabatic process is :
A. essentially an isentropic process
B. non-heat transfer process
C. reversible process
D. constant temperature process
E. constant enthalpy process
While steam expands in turbines, theoretically the entropy :
A. remains constant
B. increases
C. decreases
D. behaves unpredictably
E. none of the above
Pick up the wrong statement about critical condition of steam :
A. latent heat is zero
B. liquid directly becomes steam
C. specific volume of steam and liquid is same
D. this is the maximum pressure limit
E. all properties of liquid and steam are same
Mechanical equivalent of heat for 1 kcal or Joule’s equivalent is equal to :
A. 421 kgm
B. 421 kgm
C. 539 kgm
D. 102 kgm
E. 75 kgm
