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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 thermodynamic cheptra,for competitive exam like SSC,UPSC

                 THERMODYNAMIC

MCQ question from thermodynamic cheptra:
1.Which of the following  path function quantity
A. Workdone                            B energy
C.enthalpy                             D.Temperature
Ans : workdone

2.Tripple point temperature and pressure for a water are-
A.1.00°C & 1 ata
B.0°C & 1 ata
C.0.01°C & 0.006028 ata
D.1°C & 0.006028 ata
Ans : 0.01°C & 0.006028 ata

3.For an ideal gas compressiblity factor is -
A.units                                   B.infinity
C.zero                             D.some finite value greater than unity
Ans : units

4.Which of the following is the highest value of the adiabetic index-
A.oxygen                             B.methane
C.nitrogen                           D.helium
Ans : helium

5.For same compression ratio,the efficiency of dual cycle is-
A.greater than diesel cycle and less than otto cycle.
B.Less than diesel cycle and greater than otto cycle.
C.Greater than diesel cycle.
D.Less than otto cycle.
Ans : greater than diesel cycle and less than otto cycle.

6.If hot and cold water are mixed then entropy of the system-
A.increase                            B.decrease
C.same                                 D.may increase or decrease,its depend upon temp of water.
Ans : increase

7.In throatling procees,the following thermodynamic remain constant-
A.Enthalpy                             B.Entropy
C.Specific heat                     D.Energy
Ans : enthalpy

8.Change of entropy depends upon-
A.change of mass          
B.change of temp
C.change of specific heat
D.change of heat
Ans : change of heat

9.The change of entropy is zero during-
A.Hyperbolic process
B.Reversible adiabetic process
C.Polytropic process
D.Constant pressure process
Ans : Reversible adiabetic process

10.Carnot efficiency depends upon-
A.properties of the medium substance used.
B.Temperature range of operation.
C.Condition of engine.
D.Working of condition
Ans : temperature range of operation

11.Calorie is a measure of-
A.Specific heat
B.Quantity of heat
C.Tharmal capacity
D.Entropy
Ans : Quantity of heat

12.A sudden fall of barometer reading is a sign of approaching -
A. Storm                           B. Rain
C.fine water                     D. Cold wave
Ans : Storm

13.Stiriling and Erricson cycle are-
A. Reversible cycle
B. Irreversible cycle
C Quasi static cycle
D semi reversible cycle
Ans : Reversible cycle

14.Reversible joule cycle is call-
A.Rankine cycle
B. Brayton cycle
C.Bell Coleman cycle
D.Dual cycle
Ans : Brayton cycle

15.Temperature of gas is produced due to-
A.Its heating value
B.Kinetic energy of molecules
C.Attraction of molecules
D.Surface tension of molecules
Ans : Attraction of molecules

16.Macroscopic approach is also known as-
A.Static thermodynamics
B.Dynamic thermodynamics
C.Statical thermodynamics
D.classical thermodynamics
Ans : classical thermodynamics

17.Consider the following property-
1.Entropy
2.Temperature
3.Specific heat constant volume
4.Viscosity
A. 1                         B. 1&2
C. 1,3&4.                D. 2,3&4
Ans : 2,3&4

18.Thermal conductivity of solids metal with rise in temperature normally-
A.increase                       B.decrease
C.remain constant         D.none of this
Ans : decrease

19.Change in property in thermodynamic cycle in-
A.negative                        B.positive
C.zero                                D.none of this
Ans : zero

20.The ratio of two specific heat of air is equal to-
A. 0.17                             B. 0.24
C. 0.1                               D. 1.41
Ans : 1.41


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