Thermodynamics mcq

     

 TOP MCQ

APPLIED THERMODYNAMICS OBJECTIVE TYPES QUESTIONS WITH ANSWERS.

Here may be a list of Top MCQ of Applied Thermodynamics Objective Type Questions And Answers provided for the AKTU and ALL OTHER UNIVERSITIES EXAMINATIONS . All the MCQ questions are most vital for AKTU especially. These sort of Objective questions are going to be asked in Diploma and Degree Internal Examinations.

1. the connection between cp and cv is given by the subsequent equation (where cp = heat at constant pressure, cv = heat at constant volume, γ = cp / cv, referred to as adiabatic index, R = Gas constant).

(A) cv / cp = R

(B) cp-cv = R

(C) cv = R / γ-1

(D)Both  (B) and (C)

 

2. The cycle consisting of 2 const. pressure process and 2 isentropic process is understood as follows:

(A) Carnot cycle

(B) Stirling cycle

(C) Otto cycle

(D) None of those

 

3. The relative atomic mass of sulfur is

(A) 12

(B) 14

(C) 16

(D) 32

 

4. The efficiency of the Carnot cycle

(A) Temperature limit

(B) Pressure ratio

(C) Volume compression ratio

(D) Cutoff ratio and compression ratio

 

5. within the Otto cycle, the Otto cycle efficiency is above the diesel cycle efficiency at an equivalent compression ratio and warmth input.

(A) Combustion may be a constant amount

(B) Expansion and compression are isentropic

(C) High maximum temperature

(D) Low heat exhaust rate

 

6. the worth of Hg of 1mm is

(A) 1.333 N / m2

(B) 13.33 N / m2

(C) 133.3 N / m2

(D) 1333 N / m2

 

7. Carbonization of coal

(A) Dry coal to form fine powder

(B) Molding finely ground coal struggling with or without binding material

(C) Heat wood to a temperature of 280 ° C or higher with a limited supply of air

(D) Neither of the above

 

8. the world under the temperature-entropy curve (T-s curve) of the thermodynamic process is

(A) Absorbed heat

(B) The fever was rejected

(C) Either (A) or (B)

(D) None of those

 

9.1 Joules (J) is adequate to

(A) 1 N-m

(B) 1 kN-m

(C) 10 N-m / s

(D) 10 kN-m / s

 

10. consistent with the primary law of thermodynamics

(A) the entire internal energy of the system during the method remains constant

(B) the entire energy of the system remains constant

(C) The work done by the system is adequate to the warmth transferred by the system

(D) Internal energy, enthalpy and entropy during the method remain constant

 

11. When wood is heated to temperatures above 280 ° C with a limited supply of air, the resulting fuel is:

(A) Coke

(B) Charcoal

(C) soft coal

(D) Charcoal

 

12. the warmth energy stored within the gas and wont to raise the temperature of the gas is

(A) External energy

(B) Internal energy

(C) K.E.

(D) Molecular energy

 

13. Which of the subsequent explanations is incorrect?

(A) The closed cycle turbine plant is an external combustion plant.

(B) In closed cycle gas turbines, the pressure range depends on air pressure .

(C) Because the closed cycle has an outer surface, the advantages of an efficient combustion engine are lost.

(D) In open cycle gas turbines, the atmosphere acts as a sink and doesn't require coolant.

 

14. The temperature at which the quantity of gas become 0?

(A) Kelvin scale of temperature

(B) temperature

(C) temperature

(D) None of those

 

15. 1 kg of ethylene (C2H4) requires 2 kg of oxygen, producing 22/7 kg of CO2 and a cloth kg of water or steam.

(A) 9/7

(B) 11/7

(C) 7/4

(D) 11/4

 

16. consistent with Legnaud's law, the precise heat at a continuing pressure (cp) and therefore the heat at a continuing volume (cv) with changes in pressure and cooling .

(A)change

(B) don't change

(C) Both (A) and (B)

(D) None of those

 

17. Which of the subsequent is correct?

(A) Absolute pressure = gauge pressure + air pressure

(B) Gauge pressure = absolute pressure + air pressure

(C) air pressure = absolute pressure + gauge pressure

(D) Absolute pressure = gauge pressure-atmospheric pressure

 

18. the overall gas energy equation is as follows (where Q1-2 = heat supplied, dU = change in internal energy, and W1-2 = work wiped out units of heat):

(A) Q1-2 = dU + W1-2

(B) Q1-2 = dU-W1-2

(C) Q1-2 = dU / W1-2

(D) Q1-2 = dU × W1-2

 

19. Natural solid fuel

(A)wood

(B) Coke

(C) Anthracite

(D) Fine pulverized coal

 

20. In a perfect turbine plant, the compression and expansion processes are assumed as follows:

(A) Isothermal

(B) Isentropic

(C) Polytrope

(D) None of those

 

21. Natural petroleum could also be separated as follows

(A) Gasoline

(B) Kerosene

(C) heating oil

(D) grease

 

22. consistent with the statement of Kelvin-Planck's Second Law of Thermodynamics

(A) it's impossible to create an engine that operates during a cyclic process whose sole purpose is to convert thermal energy into work.

(B) it's possible to create an engine that operates during a cyclic process whose sole purpose is to convert thermal energy into work.

(C) it's impossible to create a tool that operates during a circulation process and has no effect aside from heat transfer from the cold body to the recent body.

(D) Neither of the above

 

23. The pressure exerted by a perfect gas is that the to think about the K.E. of all molecules contained during a unit volume of gas.

(A) Half

(B) One-third

(C) Two-thirds

(D) Three-quarters

 

24. Changes occur when the gas is heated

(A) Pressure

(B) Volume

(C) Temperature

(D) All of those

 

25. The properties of the agonist that increase or decrease when heat is reversibly supplied or removed are referred to as follows.

(A) Enthalpy

(B) Internal energy

(C) Entropy

(D) External energy

 

26. the most fuel utilized in steam boilers is

(A) Lignite

(B) Peat

(C) soft coal coke

(D) Non-viscous soft coal

 

27. the warmth absorbed or rejected by the agonist is given by the subsequent equation (where ds = increase or decrease in entropy, T = temperature , dQ = heat absorbed or rejected):

(A) δQ = T.ds

(B) δQ = T / ds

(C) dQ = ds / T

(D) None of those

 

28. The universal gas constant (R) is

(A) Total of two specific heats

(B) Difference between the 2 specific heats

(C) Product of two specific heats

(D) Ratio of two specific heats

 

29. the method of heating or expanding a gas in order that the merchandise of pressure and volume remains constant is called:

(A) Isothermal process

(B) Hyperbolic process

(C) Insulation process

(D) Polytropic process

 

30. The efficiency of the double combustion cycle at an equivalent compression ratio is a little more diesel cycle.

(A)Greater than

(B)Less than

(C) Equal

(D) None of those