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Theory of machine| part -1

Kinematics links - Every part of machine which have relative motion to another part.   → The link should be resistance body.   What is resistant body? →Under the action of force it can transfer motion and power. Kinematics links →1. Rigid links     2. Flexible links     3. Fluid links Rigid links - There is no deformation.   Ex - piston,connecting rod Flexible links - Deformation is allowed under permissible limits. Ex - Belt drive Fluid links - A fluid link is one that is deformed by having fluid in a closed vessel and the motion is transmitted through the fluid by pressure. Ex - Hydraulic press   Types of links - 1. Singular 2. Binary 3. Ternary 4. Quaternary links
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MCQ question from tharmal for competitive exam specially ssc JE

                  THERMODYNAMIC

MCQ question
1.The unit of temperature in S.I unit is-
 A.farenheit.                        B.celcius
 C.kelvin                               D.centrigrade
Ans : kelvin

2.The unit mass of S.I unit is-
A.kilogram                          B.gram
C.quintal.                             D.Tonne
Ans : Tonne

3.The unit of enenergy S.I unit is-
A.joule                                B.watt
C.joule/m                           D.joule/s
Ans : Joule

4.The unit of time S.I unit is-
A.hour.                                B.second
C.Minute                             D.hour
Ans : second

5.General gas equation is-
A.pV = nRT                        B.pV = mRT
C.PV = C                            D.PV = KiRT
Ans : pV = mRT

6.An ideal gas real compare to real gas at very high pressure occupies-
A.more volume                B.less volume
C.same volume               D.unpredictable behavior.
Ans : more volume

7.which of the following laws is applicable for the behavior of a perfect gas-
A.Boyle's law                   B.charles' law
C.Gay - lussac law          D. All of the above
Ans : all of the above

8.Which of the following can be regarded as gas show that gas law could be applicable,within commonly encountered temperature limits?
A.O2,N2,steam,Co2.         B.O2,N2,water vapour
C.steam vapours,H2,Co2  D.O2,N2,H2,air
Ans : O2,N2,H2,air

9.According to Dalton's law,the total pressure of the mixture of the gases is equal to
A.greater of the partial pressures of all
B.average of the partial pressure of all
C.sum of the partial pressures of all
D.atmospheric pressure
Ans : sum of the partial of pressure of all

10.Which temperature of scale has the freezing point of water?
A.Celsius                          B.Fahrenheit
C.Rankine                         D.kelvin
Ans : Celsius

11.A system that is insulated said to be-
A.adiabetic                      B.isochoric
C.isotharmal                   D.aergonic
Ans : adiabetic

12.The equation Pdv represents-
A.moving boundary work
B.pressure flow work
C.mechanical work
D.surface tension work
Ans : moving boundary work

13.On weight basis,air contain following parts of oxygen-
A. 21                               B. 25
C. 23                               D. 73
Ans : 23

14.Which of the following is the property of a systsem-
A.pressure and temperature
B.Internal energy
C.volume and density
D.all of the above
Ans : all of the above

15.which of the following is not intensive property-
A.pressure                      B.temperature
C.Heat                             D.density
Ans : heat

16.Which of the following item is not a path function-
A.Internal energy          B. Heat
C.work energy               D. None of this above
Ans : InInternal energy

17.The value is n = 1 in polytropic process indicates it to be-
A.reversible process
B.irreversible process
C.isothermal process
D.adiabetic process
Ans : isothermal process

18.Change in enthaply of a system is the heat supplied at-
A.constant pressure
B.constant temperature
C.constant volume
D.constant entropy
Ans : constant pressure

19.Solids and liquid have-
A.one value of specific heat
B.two value of specific heat
C.three value of specific heat
D.no value of specific heat
Ans : one value of specific heat

20.The term of N.T.P stands for-
A.normal temperature and pressure
B.normal thermodynamic practice
C.netural thermodynamic practice
D.natural temperature and pressure
Ans : normal temperature and pressure

21.kinetic theory of gases assume that collision between molecules are-
A.perfectly inelastic
B.perfectly elastic
C.partly elastic
D.partly inelastic
Ans : perfectly elastic

22.At which temperature of water density is maximum?
A.273K                                 B.277K
C.285K                                 D.280K
Ans : 277K

23.If closed system undergoing an irreversible process,the entropy of the system-
A.must increase               B.must decrease
C.all remain constant      D.can increase,decrease or remain constant
Ans : can increase,decrease or remain constant

24.Heat and work are-
A.intensive property
B.extensive property
C.point function
D.path function
Ans : path function

25.First law of thermodynamic of gives definition of which property?
A.temperature                 B.Internal energy
C.entropy                         D.Tharmal energy
Ans : Internal energy
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