1. The main function of nozzle is to __________?
a) Varying temperatures
b) Pressure variations
c) Load variations
d) Heat variations
Explanation: The main function of nozzle is to vary the pressure of fluid passing through the nozzle. It is done by opening and shutting the sets of nozzles. Thus, its main function is to regulate pressure of the fluid.
2. The main function of centrifugal pumps are to ______
a) Transfer speed
b) Transfer pressure
c) Transfer temperature
d) Transfer energy
Explanation: The primary objective of a centrifugal pump is to transfer energy. Centrifugal pump is a turbomachinery. Turbomachines are machines that transfer energy between a rotor and a fluid, including both turbines and compressors. It is a mechanical device.
3. Centrifugal pumps transfer energy from _______
a) Rotor to fluid
b) Fluid to rotor
c) Draft to rotor
d) Rotor to draft
Explanation: Centrifugal pumps transfer energy from rotor to fluid. The primary objective of a centrifugal pump is to transfer energy. Centrifugal pump is a turbomachinery.
4. Which among the following control the flow rate?
a) Valve
b) Pump
c) Head
d) Tank pipe
Explanation: Flow rate of the tank is controlled by the valve. The actuation of individual valve closes. This corresponds to the set of nozzle thereby controlling the actual flow rate of the fluid passing through the valve.
5. Turbines and compressors work with the gas, while centrifugal pump transfers energy.
a) true
b) false
Explanation: Turbines and compressors work with the gas, while centrifugal pump transfers energy. Centrifugal pumps transfer energy from rotor to fluid. The primary objective of a centrifugal pump is to transfer energy. Centrifugal pump is a turbomachinery.
6. Centrifugal pumps are a sub class of dynamic axisymmetric work absorbing turbomachinery.
a) true
b) false
Explanation: The statement is true. Centrifugal pumps are a sub class of dynamic axisymmetric work absorbing turbomachinery. The main function of centrifugal pumps are to transfer energy.
7. The inlet passage of water entry is controlled by ________
a) Head race
b) Gate
c) Tail race
d) Pump
Explanation: The inlet passage of water entry is controlled by the gate opening. The gate opening is an opening that sends only a percentage of fluid through the inlet passages for water to enter to the turbine.
8. Centrifugal pumps are used to transport ________
a) Pressure
b) Speed
c) Power
d) Fluid
Explanation: Centrifugal pumps are used to transport fluids. They transport fluids by conversion of energies. Centrifugal pumps are a sub class of dynamic axisymmetric work absorbing turbomachinery.
9. Centrifugal pumps transport fluids by converting _________
a) Kinetic energy to hydrodynamic energy
b) Hydrodynamic energy to kinetic energy
c) Mechanical energy to kinetic energy
d) Mechanical energy to Hydrodynamic energy
Explanation: Centrifugal pumps are used to transport fluids. They transport fluids by conversion of energies. Centrifugal pumps transport fluids by converting rotational Kinetic energy to hydrodynamic energy.
10. With the increase in load, Energy in the turbine________
a) Decreases
b) Increases
c) Remains same
d) Independent
Explanation: When there is an increase in the load, the energy in the turbine is drained off. Thus, to increase the energy, the by pass valve is opened to increase the amount of fresh steam entry. This increases the energy in the turbine.