2001. Choose the correct relationship ?
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A. kinematicviscosity = dynamicviscosity x density

B. dynamicviscosity = kinematicviscosity x density

C. hydrostaticforce = surface tension x gravity

D. specific gravity = gravity x density

E. gravity = specific gravity x density

2002. Two dimensional flow occurs when________________?
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A. the magnitude and direction of the velocity do not change from point to point in the fluid

B. velocity, depth, pressure, etc. change from point to point in the fluid flow

C. the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane

D. the velocity of successive fluid particles, at any point, is the same at successive periods of time

E. the direction and magnitude of the velocity at all points are identical

2003. For pipes, turbulent flow occurs when Reynolds number is _____________________?
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A. none of the above

B. less than 2000

C. between 2000 and 4000

D. less than 4000

E. more than 4000
2004. Reheating of steam under ideal conditions takes place at constant __________________?
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A. enthaply

B. all of the above

C. temperature

D. entropy

E. pressure

2005. The balanced draft furnace is one using _________________________?
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A. induced draft fan and forced draft fan

B. induced draft fan and chimney

C. none of the above

D. any one of the above

E. forced draft fan and chimney

2006. At critical point, i.e. p=225.65 kg/cm2, the latent enthalpy of vaporisation is______________?
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A. zero

B. none of the above

C. minimum

D. depends on temperature also

E. maximum

2007. In the case of steady flow of a fluid, the acceleration of any fluid particle is________________?
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A. zero under limiting conditions

B. zero

C. constant

D. variable

E. never zero

2008. Pitot tube is used for measurement of_________________?
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A. flow

B. pressure

C. velocity

D. dsscharge

E. viscosity

2009. In a free vortex motion, the radial component of velocity everywhere is________________?
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A. maximum

B. non-zero and finite

C. zero

D. minimum

E. unpredictable

2010. The steam temperature with increase in load in case of a boiler fitted with radiation super heater________________?
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A. decreases

B. first increases and then decreases

C. increases

D. unpredictable

E. remains unaffected

2011. The normal stress in a fluid will be constant in all directions at a point only if__________________________?
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A. it is frictionless

B. it is at rest

C. it has zero viscosity

D. it is incompressible

E. it has uniform viscosity

2012. Water at pressure of 4 kg/cm2 and 160C temperature when exposed to atmosphere will_________________?
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A. boil

B. cool down

C. none of the above

D. flash i.e. get converted into steam

E. remain as it was

2013. Piezometer is used to measure_____________________?
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A. flow

B. pressure in pipe, channels etc.

C. atmospheric pressure

D. very low pressures

E. difference of pressure between two points

2014. A ship whose hull length is 100 m is to travel at 10 m/sec. For dynamic similarity, at what velocity should a 1:25 model be towed through water ?
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A. 2 m/sec

B. 25 m/sec

C. 50 m/sec

D. 250 m/sec

E. 10 m/sec

2015. The density of water is 1000 kg/m3 at__________________?
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A. 4C D. 20C

B. all temperature

C. 0C

D. 0K

2016. In natural circulation type boiler _______________?
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A. heating takes place at bottom and the water supplied at bottom gets converted into the mixture of steam bubbles and hot water which rise to drum

B. water is converted into steam in one . pass without any recirculation

C. water is supplied in durm and through down-comers located in atmospheric conditon it passes to the water wall and rises to drum in the form of mixture of water and steam

D. water is fed at atmospheric pressure

E. feed pump is employed to supplement natural circulation in water wall type furnace

2017. Which of the following manometer has highest sensitivity_________________?
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A. U-tube with water

B. displacement type

C. micro-manometer with water

D. U-tube with mercury

E. inclined U-tube

2018. The buoyancy depends on___________________?
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A. depth of immersion

B. mass of liquid displaced

C. none of the above

D. pressure of the liquid displaced

E. viscosity of the liquid

2019. For manometer, a better liquid combination is one having ___________________?
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A. low density and viscosity

B. surface tension is no criterion

C. lower surface tension

D. high density and viscosity

E. higher surface tension
2020. Pick up the wrong statement about critical condition of steam___________________?
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A. liquid directly becomes steam

B. all properties of liquid and steam are same

C. specific volume of steam and liquid is same

D. this is the maximum pressure limit

E. latent heat is zero

2021. Flow occurring in a pipeline when a valve is being opened is________________?
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A. laminar

B. rotational

C. vortex

D. unsteady

E. steady

2022. For very great pressures, viscosity of moss gases and liquids__________________?
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A. none of the above

B. shows erratic behavior

C. remains same

D. increases

E. decreases

2023. Water boils when its vapour pressure ___________________?
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A. equals that of the surroundings

B. boiling has ^nothing to do with vapour pressure

C. equals 760 mm of mercury

D. equals the pressure of water in the container

E. equals to atmospheric pressure

2024. A packaged boiler is one in which various parts like firing equipment, fans, feed pumps and automatic controls are________________?
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A. none of the above

B. supplied by same manufacturer loose and assembled at site

C. packaged boiler does not exist

D. supplied mounted on a single base

E. purchased from several parties and packed together at site

2025. The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the sub-merged body is called_______________?
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A. upthrust

B. metacentre

C. center of pressure

D. reaction

E. buoyancy
2026. Presence of moisture in fuel oil would____________________?
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A. aid in proper combustion

B. clean the nozzles

C. keep the burner tips cool

D. cause sputtering, possibly extinguishing flame

E. reduce flame length

2027. For a floating body to be in stable equilibrium, its metacentre should be___________________?
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A. below the center of buoyancy

B. below the center of gravity

C. above the center of gravity

D. above the center of buoyancy

E. between e.g. and center of pressure

2028. With increase in load, radiant super heater has____________________?
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A. drooping characteristic

B. none of the above

C. rising characteristic

D. flat characteristic

E. lihear characterisstic

2029. The equation of continuity holds good when the flow____________________?
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A. is steady

B. velocity is uniform at all the cross sections

C. none of the above

D. is one dimensional

E. all of the above
2030. On Mollier chart, free expansion, or throttling process from high pressure to atmosphere is represented by_______________?
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A. straight inclined line

B. horizontal straight line

C. curved line

D. vertical straight line

E. none of the above

2031. In a throttling process________________?
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A. steam volume remains constant

B. steam enthalpy remains constant

C. steam temperature remaisn constant

D. steam entropy remains constant

E. steam pressure remains constant

2032. The evaporation of 15.653 kg of water per hour from and at 100C is called_________________?
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A. boiler efficiency

B. one boiler h.p.

C. equivalent evaporation

D. evaporative capacity

E. factor of evaporation

2033. The diameter of fire tubes in Cochran boiler is of the order of___________________?
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A. 6 Cm ,

B. 15 cm

C. 12 cm

D. 8 cm

E. 2 cm

2034. Alkaline pyrogallate is used in Orsats apparatus for absorption of _________________?
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A. CO

B. C02

C. 02

D. N2

E. none of the above

2035. Carbonation of coal is the process of________________________?
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A. pulverising coal in inert atmosphere

B. heating wood in a limited supply of air at temperatures below 300C

C. binding the pulverised coal into brick-ettes

D. strongly heating coal continuously for about 48 hours in the absence of air in a closed vessel

E. enriching carbon in the coal

2036. Pick up the correct statement as regards Cornish boiler and Lancashire boiler _______________?
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A. cornish is fire tube and lancashire is water tube

B. cornish is water tube and lancashire is fire tube

C. cornish has two fire tubes and lancashire has one

D. lancashire has two fire tubes and cornish has one

E. both have two fire tubes

2037. Hard coke is used in________________?
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A. blast furnace

B. domestic use

C. cement industry

D. locomotives

E. thermal power plant

2038. 02 content in atmospheric air on volume basis is___________________?
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A. 40%

B. 21%

C. 23%

D. 30%

E. 70%

2039. Pick up the wrong statement?
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A. manganese in steel induces hardness

B. sulphur, phosphorous and lead improve machining properties of steel

C. nickel and chromium in steel help in raising the elastic limit and improve the resilience and ductility

D. aluminium in steel results in excessive grain growth

E. tungsten in steels improves magnetic properties and hardenability

2040. The vapour pressure over the concave surface is______________________?
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A. none of the above

B. greater than the vapour pressure over the plane surface

C. equal to the vapour pressure over the plane surface

D. zero

E. less man the vapour pressure over the plane surface
2041. One kilowatt-hour energy is equivalent to ________________?
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A. 1000 kJ

B. 1000 J

C. 3600 kW/sec

D. 360 kJ

E. 3600 kJ
2042. The dry saturated steam at very low pressure, (5-10 kg/cm2) when throttled to atmosphere will become________________?
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A. none of the above

B. remain dry satruated

C. dry

D. wet

E. superheated
2043. During the opening of a valve in a pipe line, the flow is_________________?
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A. laminar

B. steady

C. free vortex type

D. unsteady

E. uniform

2044. Maximum energy loss in a boiler occurs due to _______________________?
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A. incomplete combustion

B. ash content

C. radiation losses

D. flue gases

E. unburnt carbon in ash

2045. According to the principle of buoyancy a body totally or partially immersed in a fluid will be lifted up by a force equal to_________________?
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A. more than the weight of the body

B. weight of the fluid displaced by the body

C. weight of body plus the weight of the fluid displaced hy the body

D. the weight of the body

E. less than the weight of the body

2046. The increase in pressure _________________?
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A. none of the above

B. raises the boiling point of a liquid

C. reduces its volume

D. lowers the boiling point of a liquid

E. .does not affect the boiling point of a liquid

2047. For burning 1 kg of carbon to CO as per chemically correct combusiton, amount of air required is___________________?
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A. 8/3kg

B. 16/3 kg

C. 4/3kg

D. 1 kg

E. 2 kg

2048. It is required to produce large amount of steam at low pressure. Which boiler should be used ?
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A. lancashire boiler

B. pulverised fuel fired boiler

C. cochran boiler

D. stoker fired boiler

E. babcock and wilcox boiler

2049. The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be ________________?
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A. 4000 kg

B. 500 kg

C. 1500 kg

D. 1000 kg

E. 2000 kg
2050. The ratio of heat utilised to produce steam and the heat liberated in furnace is known as___________________?
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A. boiler efficiency

B. factor of evaporation

C. boiler effectiveness

D. boiler evaporative capacity

E. equivalent evaporation