Steam and Gas Turbines Multiple Choice Questions on “Fire Resisting Fluids in Steam Turbines”.
1. Fire resistant fluids can be used in __________ pressures.
a) high
b) low
c) both high and low
d) none of the mentioned
Answer: c
Clarification: Fire resistant fluids can be used in high and also low pressure. But mostly fire resistant fluids are used under high pressures as they don’t have any use in the case of low pressures.
2. __________ esters can be used as fire resistant fluids.
a) Phosphate
b) Potassium
c) Sodium
d) None of the mentioned
Answer: a
Clarification: Phosphate esters can be used as fire resistant fluids. As boiling point of phosphate esters are high they can withstand to high temperatures without boiling.
3. Ester mineral blends can also be used as fire resistant fluids.
a) True
b) False
Answer: a
Clarification: Ester mineral blends can also be used as fire resistant fluids. As esters have high boiling points.
4. _______ glycols can also be used as fire resistant fluids.
a) Methylene
b) Ethylene
c) Water
d) None of the mentioned
Answer: c
Clarification: Water glycols can also be used as fire resistant fluids. Water when mixed with glycols their boiling point gets increased and hence these can be used as fire resisting fluids.
5. Fire resistance is _________ proportional to smoothening of the steam.
a) inversly
b) directly
c) fire resistance is not related to steam smootheness
d) none of the mentioned
Answer: b
Clarification: Fire resistance is directly proportional to smoothening of the steam. When there is no fire resistance there will be vigorous combustion taking place which will lead to improper production of steam.
6. Fire resistance of fluids is _______ to the vaporization of the fluid.
a) inversely proportional
b) directly proportional
c) both are no where related
d) None of the mentioned
Answer: a
Clarification: Fire resistance of fluids is proportional to the vaporization of the fluid. If the fluid is highly vaporizable then its fire resistance decreases as fluid gets easily vaporized at low temperatures.
7. __________ is the important feature of the fire resistant fluid.
a) Specific volume
b) Specific heat
c) Viscosity
d) None of the mentioned
Answer: c
Clarification: Viscosity is the important feature of the fire resistant fluid. If the fluid has high viscosity it does not get combusted easily.
8. Fire resistant fluids are selected based on operating ____________
a) temperature
b) pressure
c) temperature & pressure
d) none of the mentioned
Answer: c
Clarification: Fire resistant fluids are selected based on both operating pressure and temperature as pressure is directly proportional to temperature when the volume is constant. Temperature is considered because the fluid that is selected must be able to withstand the working temperature without getting vaporized.
9. ___________ resistance is taken into the consideration while selecting fire resistant fluid.
a) Corrosion
b) Frictional
c) Corrosion & Frictional
d) None of the mentioned
Answer: a
Clarification: Corrosion resistance is taken into the consideration while selecting fire resistant fluid. If the fluid is less corrosion resistant the combustion chambers get corroded easily which leads to break down of the gas turbine.
10. Heat resistant fluids are in _______ color.
a) Black
b) White
c) Colorless
d) None of the mentioned
Answer: b
Clarification: Heat resistant fluids are either red or pink dye color. The quality of the heat resistance offered by the fluid can be determined by the darkness of the color.