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8. Find the standard distance between sprocket having 4 in and 16 in diameters.
7. A chain with speed 800 fpm has driving sprocket turns at 900 rpm. If the pitch of chain is ¾ in, find the number of teeth of driving sprocket.
A sling Psychrometer reads, 40°c dry bulb
Temprature and 28 degree Celsius Wet bulb temp. Calculate:
(1)Specific humidity
(2) Relative humidity
(3) Vapour density
(4)Dew point temperature
(5) specific Enthalpy.
Differentiate the equation to find the functions for
ds
i)
Velocity
dt
ii) Acceleration
(a
83
=
dt?
d) Use your result from part c to calculate the velocity at
n a four-bar chain ABCD, AD is fixed link 0.12 m long, crank AB is 0.03 m long and
rotates uniformly at 100 rpm clockwise while the crank CD is 0.06 m long and rotates
about D. Link BC is equal to link AD. Find the angular velocity of link DC when angle
BAD is 600
.
A block weighing 60 N rests on a horizontal floor. a) What is the minimum force that will make the block move if the coefficient of static friction is 0.20? b) What is the minimum force that will keep the block moving at uniform speed once it starts moving if the coefficient of kinetic friction is 0.10?
A 0.8 m high, 1.5 m wide double pane window consists of two 4 mm
thick layers of glass (k=78 W/mK) and is separated by a 10 mm wide
stagnant air space (k=0.026W/mK). The room is at 20°C and the
outside air is at -10°C. The heat transfer coefficients are 10 and 40
W/m2K. find
i) The rate if heat transfer through the window
ii) The inside surface temperature
A piston cylinder containing steam at 700 kPa at 250 degrees celcius undergoes a constant pressure process until the quality is 70%. Determine: a). Work done b). Heat transferred c). Change in internal energy d). Change in enthalpy NOTE: - INDICATE THE PV and TS DIAGRAM - INDICATE THE INITIAL AND FINAL STATE OF THE SUBSTANCE
Ans. (a) -101.4 kJ/kg (b) -810 kJ/kg (c) -708.5 kJ/kg (d) -810 kJ/kg
A steam engine isentropically expands 7.382 kg/sec of steam from 0.68 Mpa,
220°C, the exhaust is dry and saturated. Determine (a) the work of nonflow
process in kW and (b) the work of a steady flow process in kW. NOTE: - INDICATE THE HS and TS DIAGRAM - INDICATE THE INITIAL AND FINAL STATE OF THE SUBSTANCE
Water at 2.5 MPa and 200°C is heated at constant temperature up to a quality of 80%. Find (a) the quantity of heat received by the water, (b) the change in internal energy, and (c) the work of a nonflow process. NOTE: - INDICATE THE HS and TS DIAGRAM - INDICATE THE INITIAL AND FINAL STATE OF THE SUBSTANCE
Ans. (a) 2025.7 kJ/kg; (b) 1396.5 kJ/kg; (c) 629.17 kJ/kg
