Placement Papers - BHEL

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BHEL PAPER AT NEW DELHI

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BHEL PAPER AT NEW DELHI

       
The     ratio of two specific heats of air is equal to. = 1.41        
A     perfect gas at 270C is heated at constant pressure till its volume is     double. The final temperature is = 3270C        
An     engine operates between temperature of 9000K and T2 and another engine     between T2 and 8000K. For both to do equal work, value of T2 will be. =     6500K        
Internal     energy of a substance depends on = Temperature        
Work     done in compressing 1kg of gas adiabatically from p1,V1,T1 to p2, V2, T2 is     equal to = Cv(T2-T1)        
The     unit of entropy is = J/kg 0K        
Indicated     power of a 4-stroke engine is equal to = pLAN/2        
Which     of the following is not an internal combustion engine : a) 2 stroke petrol     engine b)4 stroke petrol engine c) Diesel engine d) steam engine e) Gas     turbine. = (d)        
If     one cylinder of a diesel engine receives more fuel than the others, then for     that cylinder the: a) exhaust will be smoky b) piston rings would stick into     piston grooves c) exhaust temperature will be high d) engine starts     overheating e) all of the above. = (e)        
The     spark plug gap is normally maintained at: = 0.45 to 0.6mm        
A     distributor in spark ignition engines performs the function of : = Providing     the correct firing order in engine        
Which     of the following does not relate to C.I. engine::
    a) fuel pump
    b) fuel injector
    c) governor
    d) carburetor
    e) flywheel = (d)        
Air     fuel ratio in a jet engine is = 60:1        
What     is the value of Prandtl No.?        
In     domestic refrigerator, the tubes at the back of the refrigerator are:
    a) evaporator
    b) condenser
    c) capillary tubes
    d)???        
Which     refrigerants has the highest critical point temperature. = Freon-11        
Wet     bulb temperature is. = indication of amount of moisture in air        
On     psychrometric chart, dry bulb temperature lines are. = Vertical        
Surface     tension has the units. = newtons/m        
The     line of action of the buoyant force acts through the. =centroid of the     displaced volume of fluid        
A     pressure of 25m of head of water is equal to. =245kN/m2        
For a     submerged body to be in stable equilibrium, the centre of gravity should be.     =Below the centre of buoyancy.        
The     actual velocity at vena contracta for flow through an orifice from a     reservoir of height H=?. =Cv?2gH        
A     body weighing 2kg in air weights 2.5kg when submerged in water. Its specific     gravity is. = 6        
In a     free vortex motion: = each particle moves in a circular path with a speed     varying inversely as the distance from the centre.        
A     centrifugal pump has speed-1000rpm, Flow-1200l.p.m, Head-20m, Power-5H.P. If     its speed is increased to 1500rpm, new flow will be.: = 1800l.p.m        
Runaway     speed of a hydraulic turbine is: = the speed if the turbine runner is     allowed to revolve freely without load and with the wicket gates wide open.        
10m     of water column is equal to = 100kN/m2        
M.I.     of a circular area about an axis perpendicular to the area is: = ?r4/2        
A     projectile is fired at an angle ? to the vertical. Its horizontal range will     be maximum when ? is . =450        
An     elevator weighing 1000kg attains an upward velocity of 4m/sec in two seconds     with uniform acceleration. The tension in the supporting cables will be =     1200kg.        
A 13m     ladder is placed against a smooth vertical wall with its lower end 5m from     the wall. What should be the co-efficient of friction between ladder and     floor so that it remains in equilibrium. = 0.21        
A car     is moving with a velocity of 60km/hr and possesses energy of 5?105 joules.     The mass of the car will be. =3000kg.        
If l     is the span of a light suspension bridge whose each cable carries total     weight (w) and the central diop is y, the horizontal pull at each support     is: = wl/y OR A beam of length l, having uniform load w kg/unit length is     supported freely at the ends. The moments at mid span will be: = wl2/8.        
A     boiler shell 200cm dia and plate thickness 1.5cm is subjected to internal     pressure of 1.5MN/m2, then the hoop stress will be. = 100N/m2        
100KW     is to be transmitted by each of two separate shafts. A is turning at 250rpm     and B at 300rpm. Which shaft must have greater diameter.: = B        
Two     identical leaf springs of spring constant k are arranged like cantilevers in     parallel and attached at free end by a spring of spring constant k. The     equivalent spring constant of combination is; = 1.5k.        
Automobile     steering gear is an example of: = lower pair.        
The     type of coupling used to join two shafts whose axes are neither in same     straight line nor parallel, but intersect is. = Universal coupling.        
To     transmit power from one rotation shaft to another whose axes are neither     parallel nor intersecting, use: = Spiral gear.        
A     gear having 100 teeth is fixed and another gear having 25 teeth revolves     around it, the centre lines of both gears being joined by an arm. How many     revolutions will be made by gear of 25 teeth for one revolution of arm. = 5     rev.        
The     secondary critical speed of a shaft occurs at: = twice the speed of primary     critical speed.        
Brittle     coating technique is used for: = experimental stress analysis.        
Factor     of safety is the ratio of: = yield stress/working stress.        
Type     of gear used for non-intersection perpendicular shafts: = Hypoid gears.        
Corrosion     resistance of steel is increased by adding: = Chromium & Nickel        
The     product of Cupola is called: = cast iron        
Brinell     tester uses a hardness steel ball of size: = 10mm        
Sintered     and tungsten carbides can be machined by: = EDM        
What     kind of abrasive cut off wheel should be used to cut concrete, stone and     masonry? =Diamond grit.        
In     break-even analysis, total cost consists of: = Fixed cost + Variable cost.        
The     amount deducted from the salary of workers towards employees provident fund     is : =deposited in the account of worker with Provident Fund Commissioner.        
PERT     is: = event oriented technique        
Bar     charts are suitable for: = minor works.        
Electron     volt is the unit of : = Energy.        
Seamless     tubes are made by?        
Reheating     in gas turbine results in: = increase of work ratio and decrease of thermal     efficiency.        
Why     DC current is not used in transformer?        
What     is the purpose of draft tube in hydraulic turbines: = to convert the kinetic     energy into pressure energy.        
A     mass of 100kg is falling from a height of 1m and penetrates the sand to 1m.     what is the resistance force of the sand?        
Two     cars travel in the same direction at 40km/hr at a regular distance. A car     comes in the opposite direction at 60km/hr. It meets each car in a gap of 8     seconds.        
What     is the distance between the two cars?

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