Steam and Gas Turbines Multiple Choice Questions on “Pressure Coefficients and Slip Factor”.
1. Fluid slip in the impeller can be measured by ____________
a) Pressure coefficient
b) Slip factor
c) Pressure coefficient & Slip factor
d) None of the mentioned
Answer: b
Clarification: Fluid slip in the impeller can be measured by slip factor.
2. Deviation in the angle of the fluid leaving the impeller is called as _________
a) slip factor
b) pressure rise
c) fluid slip
d) none of the mentioned
Answer: c
Clarification: The deviation in the angle of the fluid leaving the impeller is called fluid slip.
3. In axial impellers fluid slip is ______
a) Small
b) Large
c) Medium
d) None of the mentioned
Answer: a
Clarification: In axial impellers fluid slip is quite small.
4. In radial impellers fluid slip is _________
a) Small
b) Large
c) Medium
d) None of the mentioned
Answer: b
Clarification: In radial impellers fluid slip is large.
5. Back eddy is also responsible for ___________
a) slip factor
b) mean blade loading
c) slip factor & mean blade loading
d) none of the mentioned
Answer: a
Clarification: Back eddy is also responsible for slip factor.
6. Mean blade loading is also responsible for ___________
a) back eddy
b) slip factor
c) back eddy & slip factor
d) none of the mentioned
Answer: b
Clarification: Mean blade loading is responsible for slip factor.
7. Working fluid viscosity is also responsible for _________
a) slip factor
b) mean blade loading
c) back eddy
d) none of the mentioned
Answer: a
Clarification: Working fluid viscosity is also responsible for slip factor.
8. Boundary layer blockage is responsible for __________
a) back eddy
b) mean blade loading
c) slip factor
d) none of the mentioned
Answer: a
Clarification: Boundary layer blockage is also responsible for slip factor.
9. Slip factor is the ratio of ideal whirl velocity to actual whirl velocity.
a) True
b) False
Answer: b
Clarification: Slip factor is the ratio of actual whirl velocity to the ideal whirl velocity.
10. When blade angle decreases slip factor also __________
a) decreases
b) remains constant
c) increases
d) none of the mentioned
Answer:c
Clarification: When blade angle decreases slip factor increases.