Variation of specific fuel consumption with fuelair ratio for SI engine is shown by which of the curve shown in the figure.
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Solution
Specific fuel consumption has minimum value at lean mixture.
The dimensions of a shaft \(\overset{+0.060}{+0.030}\) are provided and a Go and No Go gauges are to be manufactured according to the shaft. Gauge tolerances are 18% of hole tolerance. Then the sizes of Go and No– Go gauges will be ______.
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Solution
A machining operation producing chip thickness ratio is given as 0.45 and the back-roks angle is 18°. Then the shear strain of work material will be _______.
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Solution
A 0.5m thick plane wall has its two surfaces kept at 300°C and 200°C. Thermal conductivities of the wall varies linearly with temperature and its values of 300°C and 200°C are 25w/mk and 15w/mk respectively. Then the steady heat flux through the wall will be _______.
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Solution
For an air-conditioned space, RTH = 100 kw, RSHF= 0.75,volume flow rate = 100 m3/min. and indoor design specific humidity is 0.01 k/kg of dry air.Then the specific humidity of supply air will be _______.
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Solution
The components of velocity in a two dimensional frictionless incompressible, flow are μ= t2 + 3y and v= 3t + 3x. The approximates resultant total acceleration at the point (3,2)and t = 2 will be ______.
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Solution
If the enthalpy drop in the moving blades and fixed blades of a steam turbines is 10kJ/kg and 15 kJ/kg respectively, then,the degree of reaction will be________.
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Solution
PQRS is a mechanism with link lengths PQ = 200, QR = 300,RS = 400 and PS = 350. Which one of the following links should be fixed for the resulting mechanism to be a double crank mechanism ? (All dimension are in mm)
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Solution
Given : Lengths of links, PQ = 200, QR = 300, RS = 400,
PS =350
PQ + PS = 200 + 350 = 550
QR + RS = 300 + 400 = 700
So, PQ + PS < QR + RS, so, PS is considered to be crank PQ + QR = 200+ 300 = 500 RS + PS = 400 + 350 = 750 PQ + QR
An elevator weighting 10000N attains an upward velocity of 4m/s in 2 seconds with uniform acceleration.Then the tension in the wire rope will be _________.
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Solution
At a point in two-dimensional stress system, σx= 100N/mm2,σy = τxy 40N/mm2. The radius of Mohr ‘s circle for stress drawn with a scale of 1cm = 10N/mm2 will be _____.
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Solution