IES Mechanical Engineering Online Test

Q1. Steam flow through a nozzle is considered as


Q2. for same compression ratio and for same heat added


Q3. Atkinson gas engine has a special feature


Q4. Substance is flowing in a pipe of 200 mm inside diameter at an average velocity of 3m/sec. At a given section of the pipe line the pressure is 1.5 MN/m2 absolute. What is the flow work of 0.5 cubic meter, expressed in joules passing this section?


Q5. The following is concerend with the combustion of gaseous fuels


Q6. If the compression ratio of an engine working on Otto cycle is increased fro 5 to 7, the %age increase in efficiency will be?


Q7. In a 4 cylinder, 4 stroke, diesel engine operating at 1200 rpm, the duration of fuel injection is 20 degrees. The time in seconds during which fuel is injected would be


Q8. Which is correct statement about the reaction time for autoignition of fuel and the fuel air ratio?


Q9. The saturation temperature of steam with increase in pressure increases


Q10. The equivalent evaporation of a boiler is a measure to compare


Q11. Sublimation region is the region where


Q12. On a Mollier chart, free expansion from high pressure to atmosphere is represented by


Q13. A fusible plug is fitted in small boilers in order to


Q14. The major axis of an elliptical manhole on the shell should be provided


Q15. An economiser in a boiler


Q16. In order to increase the thermal efficiency of aircraft jet engines, use is made of


Q17. 2. A spherical steel ball of 12 mm diameter is initially at 1000 K. It is slowly cooled in surrounding of 300 K. The heat transfer coefficient between the steel ball and the surrounding is 5/Wm2K. The thermal conductivity of steel is 20 /WmK. The temperature difference between the centre and the surface of the steel ball is


Q18. In a variable speed SI engine, the maximum torque occurs at maximum


Q19. An aircraft flying horizontally at a speed of 900 km/h is propelled by a jet leaving the nozzle at a speed of 500 m/s. The propulsive efficiency is


Q20. A ship model 1/60 scale with negligible friction is tested in a towing tank at a speed of 0.6 m/s. If a force of 0.5 kg is required to tow the model, the propulsive force required to tow the ship will be


Q21. A parachutist has a mass of 90 kg and a frontal area of 0.30 m2 in free fall. The drag coefficient based on frontal area is found to be 0.75. If the air density is 1.28 kg/m3, the terminal velocity of the parachutist will be


Q22. Heating the hypoeutectoid steels to 30 degrees celcius above the upper critical temperature and then cooling slowly to room temperature to form pearlite and ferrite structure, is known as


Q23. A helical spring has N turns of coil of diameter D, and a second spring, made of same wire diameter and same material, has N/2 turns of coil dia 2D. if the stiffness of the first spring is k, then the stiffness of the second spring is


Q24. Which one of the following features improves the fatigue strength of a metallic material?


Q25. A thin cylinder contains fluid at a pressure of 500 N/m2, the internal diameter of the shell is 0.6 m and the tensile stress in material is limited to 9000 N/m2. the shell must have a minimum wall thickness of nearly


Q26. Pearlite consists of


Q27. A masss is suspended at the bottom of two springs in series having stiffness of 10N/mm and 5N/mm. The equivalent spring stiffness of the two springs is nearly


Q28. The gross head on a turbine is 300 m. The length of penstock supplying water is 400 m. the diameter of the penstock is 1m and the velocity of water through penstock is 5m/s. If the coefficient of friction is 0.0098, the net head on the turbine would be, nearly


Q28. The gross head on a turbine is 300 m. The length of penstock supplying water is 400 m. the diameter of the penstock is 1m and the velocity of water through penstock is 5m/s. If the coefficient of friction is 0.0098, the net head on the turbine would be, nearly


Q29. In fluid machinery, the relationship between saturation temperature and pressure decides the process of


Q30. The main purpose of Chaplets is

































Description:

This test will cover topics on FM, Thermo, SOM, HT, Material Science, Production Engg. It will be a multiple choice test. Check out the UPSC IES Mechanical Engineering Coaching for 2013 and Engineering Mathematics for GATE and IES courses by Himanshu as well.

Discussion

Umam

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1684 days 4 hours 30 minutes ago

Umam

Selain logam ada yang disebut dengan istilah bukan logam (nonmetal) dan unsur metaloid (yang menyerupai logam). http://goo.gl/TLJKhQ http://bit.ly/2bgLGS7

1684 days 4 hours 30 minutes ago

Genset Malang

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1726 days 5 hours 1 minutes ago

Himanshu Vasistha

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1789 days 2 minutes ago

Pathulothu Ranga

f steam flow trough nozzle we must know if nozzle with constant diameter or not if nozzle with varying diameter the flow isothermal if the nozzle not transfer heat if the nozzle constant diameter the flow constant volume some times you are wrong haw heat transfer science not care for heat and no relation between compression ratio and heat engine

1825 days 14 minutes ago

Ahmed Assem Zakreia

if steam flow trough nozzle we must know if nozzle with constant diameter or not if nozzle with varying diameter the flow isothermal if the nozzle not transfer heat if the nozzle constant diameter the flow constant volume some times you are wrong haw heat transfer science not care for heat and no relation between compression ratio and heat engine efficiencySee more

2686 days 1 hours 50 minutes ago

Ahmed Assem Zakreia

if steam flow trough nozzle we must know if nozzle with constant diameter or not if nozzle with varying diameter the flow isothermal if the nozzle not transfer heat if the nozzle constant diameter the flow constant volume some times you are wrong haw heat transfer science not care for heat and no relation between compression ratio and heat engine efficiencySee more

2686 days 1 hours 50 minutes ago

Ahmed Assem Zakreia

if steam flow trough nozzle we must know if nozzle with constant diameter or not if nozzle with varying diameter the flow isothermal if the nozzle not transfer heat if the nozzle constant diameter the flow constant volume some times you are wrong haw heat transfer science not care for heat and no relation between compression ratio and heat engine efficiencySee more

2686 days 1 hours 50 minutes ago

Ahmed Assem Zakreia

if steam flow trough nozzle we must know if nozzle with constant diameter or not if nozzle with varying diameter the flow isothermal if the nozzle not transfer heat if the nozzle constant diameter the flow constant volume some times you are wrong haw heat transfer science not care for heat and no relation between compression ratio and heat engine efficiencySee more

2686 days 1 hours 50 minutes ago

Ahmed Assem Zakreia

if steam flow trough nozzle we must know if nozzle with constant diameter or not if nozzle with varying diameter the flow isothermal if the nozzle not transfer heat if the nozzle constant diameter the flow constant volume some times you are wrong haw heat transfer science not care for heat and no relation between compression ratio and heat engine efficiencySee more

2686 days 1 hours 50 minutes ago

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