engineersacademy.org ESE Mechanical Mock Test Paper 2018 Engineering Services Examination

Organisation : Engineers Academy
Exam : ESE-2018 Mechanical Mock Test Paper
Document Type : Sample Question Paper
Year : 2018
Category : Mechanical Engineering
Website : http://www.engineersacademy.org/downloaddetail/mechanical-(me)/3/8/12/
Download Question Paper : https://www.pdfquestion.in/uploads/23479-ESEMockME.pdf

Engineers Academy ESE Question Paper

Engineering Services Examination abbreviated as ESE are the civil services that meet the technical and managerial functions of the Government of India.

Related : Engineers Academy ESE Civil Mock Test Paper 2018 Engineering Services Examination : www.pdfquestion.in/23474.html

Like most countries, the Government of India recruits its civil servants and officials on the basis of merit, the middle management positions in the bureaucracy are filled through competitive exams.

Exam Pattern

Paper I : General studies and Engineering Aptitude – 2 hours – 200 Marks
Paper II : Mechanical Engineering – 3 hours – 300 Marks
Total : 500 Marks

ESE Mechanical Mock Test Paper

1. Thermal diffusivity of material ‘A’ is 100 m2/s and material ‘B’ is 200 m2/s, then heat absorb by
(a) A is more than B
(b) B is more than A
(c) Both are same
(d) Can not be predicted

2. At room temperature, the ratio of radiation heat transfer coefficient and the surface emissivity is about
(a) 1.5
(b) 2.0
(c) 3.0
(d) 6.0

3. Thermal conductivity of gases with increase in molecular weight
(a) increases
(b) decreases
(c) remain same
(d) none of these

4. A furnace wall has x = 10 cm and k = 0.2 W/mK with surface temperature of 500°C and 300°C. The rate of heat transfer by conduction is
(a) 100 W/m2
(b) 200 W/m2
(c) 300 W/m2
(d) 400 W/m2

5. The heat flow line at a point in a solid is along a path parallel to the
(a) Isotropic surface
(b) Isothermal surface
(c) Adiabatic surface
(d) Isobaric surface

6. In a fully developed laminar flow through a tube
(a) u 0 x
(b) T x at any radius (r) is not zero
(c) The temperature profile continuously changes with ‘x’
(d) All of the above

7. Which of these is/are properties of fluid
(1) Eddy viscosity
(2) Eddy diffusivity
(3) Kinematic viscosity
(a) (1) and (3) (b) (2) and (3)
(c) (3) only (d) (1), (2) and (3)

8. The convective heat transfer coefficient for laminar and turbulent flows over a flat plate varies respectively as
(a) x1/2 and x0.2
(b) x1/2 and x–0.2
(c) x–1/2 and x–0.2
(d) x–1/2 and x0.2

9. In liquid metal heat transfer, Nusselt number is a function of which dimensionless number
(a) Pr only
(b) Re only
(c) Peclet only
(d) Peclet and Re

10. In nucleate boiling to form the nuclii of bubble there must be present
(a) superheated vapour
(b) dissolved gases
(c) undissolved gases
(d) superheated liquid

11. In nucleate boiling, bubbles always originate
(a) in the bulk of the liquid
(b) on the heating surface
(c) where the liquid superheat is minimum
(d) where the liquid is saturated

12. From these two statements:
(1) In forced convection boiling inside a tube, the heat transfer coefficient increases sharply in the bubble flow regime.
(2) Because the bubbles appearing at the surface grow and are carried away into the liquid stream.
(a) (1) is true, (2) is false
(b) (1) is false, (2) is true
(c) Both are false
(d) Both are true

13. Cavities on the heating surface are used most advantageously when the entire surface is exposed to
(a) nucleate boiling
(b) film boiling
(c) transition boiling
(d) pool boiling

14. From these two statements:
(1) The rate of condensation on a rusty surface is more than that on a polished surface.
(2) The polished surface promotes dropwise condensation
(a) (1) is true, (2) is false
(b) (1) is false, (2) is true
(c) Both are false
(d) Both are true

15. For a balanced counter flow heat exchanger given that NTU is 1.5, then calculate its effectiveness
(a) 0.5
(b) 0.55
(c) 0.60
(d) 0.65

16. In a shell and tube heat exchanger, baffles are provided on the shell side to which is incorrect statement
(a) prevent the stagnation of the shell side fluid
(b) improve heat transfer
(c) provide support for tubes
(d) prevent fouling of tubes

17. For a counter flow shell and tube heat exchanger given that m? hCh = 4000 W/K and m? cCc = 2000 W/K, overall heat transfer coefficient is U = 500 W/m2K. What should be the area of heat transfer? given NTU = 1.5
(a) 2 m2
(b) 4 m2
(c) 6 m2
(d) 8 m2

18. For a balanced parallel flow heat exchanger, the temperature profile of the two fluids along the length of the heat exchanger
(a) linear
(b) parallel
(c) linear and parallel
(d) parabolic

19. At thermal equilibrium
(1) The net radiation heat exchange is zero
(2) Radiation mechanism stop Of these two statements:
(a) (1) is true, (2) is false
(b) (1) is false, (2) is true
(c) Both are true
(d) Both are false

20. Thermal conductivity of water if temperature increases from 20°C to 100°C
(a) decreases
(b) increases
(c) first increases than decreases
(d) first decreases than increases

21. What is the correct decreasing order of thermal diffusivity (?)
(a) liquid > gases > metal
(b) gases > liquid > solid
(c) solid > gases > liquid
(d) gases > solid > liquid