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Hassan
1.Rocket fuels has ________ molecular weight.
A. medium
B. high
C. low
D. medium
2.Cryogenic fuels are in _________ state at room temperature and pressure.
A. gaseous
B. liquid
C. solid
D. gaseous
3.Hybrid rocket engines are also called as ________ propellant rocket engines.
A. solid
B. liquid
C. solid & liquid
D. solid
4.______ is used as cryogenic fuel.
A. Liquid oxygen
B. Liquid hydrogen
C. Combination of liquid oxygen and liquid hydrogen
D. Liquid oxygen
5.Liquid hydrogen and oxygen mixture produces thrust upto ________
A. 5 Km/s
B. 4 Km/s
C. 4.5 Km/s
D. 5 Km/s
6._____ initiators are used in cryogenic rocket engines.
A. Pyrotechnic
B. Centrifugal
C. Pyrotechnic & Centrifugal
D. Pyrotechnic
7.Jet engines are classified into _______ types.
A. 5
B. 4
C. 3
D. 5
8.Jet engines works on ______ cycle.
A. brayton
B. dual
C. dual
D. brayton
9.____ bypass turbo fan engines are used in sub sonic flights.
A. Medium
B. Low
C. High
D. Medium
10.Turbofans gives more efficiency when the speed is ______ than the mach speed.
A. greater
B. less
C. equal
D. greater
11.__ compressors are used in turbojets.
A. Axial
B. Radial
C. Axial & Radial
D. Axial
12.____ compressors can be used in turbojets.
A. Radial
B. Centrifugal
C. Radial & Centrifugal
D. Radial
13.Internal energy in the fuel is converted into __________ of the exhaust in turbojets.
A. kinetic energy
B. pressure energy
C. kinetic & pressure energy
D. kinetic energy
14.Jet engines have ________ shafts.
A. single
B. multiple
C. single or multiple
D. single
15.What is fluid mechanics?
A. Study of fluid behaviour at rest
B. Study of fluid behaviour in motion
C. Study of fluid behaviour at rest and in motion
D. Study of fluid behaviour at rest
16.Which of the following is the basic principle of fluid mechanics?
A. Momentum principle
B. Energy equation
C. Continuity equation
D. Momentum principle
17.What is fluid mechanics used for?
A. Fluid mechanics enables to comprehend the behaviour of solid fluids under pressure
B. Fluid mechanics enables to comprehend the behaviour of fluids under a variety of forces & atmospheric conditions
C. Fluid mechanics enables to comprehend the behaviour of fluids under various temperatures only
D. Fluid mechanics enables to comprehend the behaviour of solid fluids under pressure
18.If a person studies about a fluid which is at rest, what will you call his domain of study?
A. Fluid Dynamics
B. Fluid Mechanics
C. Fluid Statics
D. Fluid Dynamics
19.Which among the following is the standard symbol for Atwood number?
A. Ar
B. A
C. a
D. Ar
20.Which of the following method is used exclusively in fluid mechanics?
A. Eulerian method
B. Lagrangian method
C. Neither Lagrangian nor Eulerian method
D. Eulerian method
21.Which of the following method is most commonly used in fluid mechanics for analysis?
A. Eulerian Method
B. Control volume analysis
C. Langragian method
D. Eulerian Method
22.When is a fluid called turbulent?
A. High viscosity of fluid
B. Reynolds number is greater than 2000
C. Reynolds number is less than 2000
D. High viscosity of fluid
23.Which among the following is the standard symbol for Blake number?
A. ba
B. b
C. Bi
D. ba
24.Stagnation point is the point in fluid mechanics where the velocity of the fluid at that point is _____
A. unity
B. constant
C. infinite
D. unity
25.Which among the following is the standard symbol for Archimedes number?
A. Ar
B. A
C. a
D. Ar
26.Which among the following is referred to as the temperature at a stagnation point in the flow of fluids in fluid mechanics and thermodynamics.
A. Absolute temperature
B. Maximum temperature
C. Stagnation temperature
D. Absolute temperature
27.What is model testing?
A. Overall testing
B. Function testing
C. Partial testing
D. Overall testing
28.When is the fluid called laminar?
A. Low viscosity
B. The density of the fluid is high
C. Reynolds number is greater than 2000
D. Low viscosity
29.Which among the following provides the third principle in fluid mechanics?
A. Conservation of Heat
B. Conservation of volume
C. Conservation of linear momentum
D. Conservation of Heat
30.When a fluid is subjected to resistance, it undergoes a volumetric change due to __________
A. Cohesion
B. Strain
C. Compressibility
D. Cohesion
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