Engineering Answers

These descriptions of higher pair, ( A.Connected with surface C.Wear slower

) is correct.

B.Connected with point or line

D.Constrain 2 DOFs

These descriptions of machine, mechanism, link and part, ( A. Part is the minimum motion element

B. Link is the minimum manufacturing element

C. Mechanism must have a relative fixed link as frame D. Machine can’t transmit information

For the description of machine, mechanism, link and parts, ( ) is correct.

A.Parts is motion element B.Link is manufacturing element

C.Machine and mechanism are machinery D.Maybe there is no frame in a mechanism

In cam mechanism, the angle which the cam turns when the follower at the fastest is called ( ).

A.Cam angle for rise B.Cam angle for return

C.Cam angle for outer dwell D.Cam angle for inner dwell

Connect two conductors to the sheath. Measure the capacitance, Cd between the remaining single conductor and the two other conductors and the sheath. Take the capacitance between the shorted cores and the sheath as Cb. Now determine the effective capacitance of each conductor to the grounded neutral.

Pure water was used to remove 90% ammonia from the gas mixture in packed bed tower. The gas

mixture which contain 5 mol% NH 3 enters from the bottom of the column at flow rate of 100 kmol/h.

Pure water enters from the top of the column at a flow rate 1.5 times minimum pure water flow rate

(1.5 L’ min ). The column cross sectional area is 0.20 m 2 . The equilibrium relationship for NH 3 and water

is given by y = 0.8915x. The film mass transfer coefficients are given as k’ y a = 0.0739 kmol/s.m 3 and

k’ x a = 0.169 kmol/s.m 3 . Determine the height of the packed tower using liquid film mass transfer

coefficient, k’ x a.

Test the significance at 0.05 level of the computed values of correlation r= 0.65 with a sample size of 10

A supplier sells ropes. He claims that the ropes have a mean strength of 34 pounds and a variance of 64 pounds. A random sample of 32 ropes selected from a shipment yields a mean strength of 31 pounds. Could the claim of the supplier be rejected at 0.05 level?

Find out about the wall construction of the cabins of large commercial airplanes (say the Boeing 777), the range of ambient conditions under which they operate, typical heat transfer coefficients on the inner and outer surfaces of the wall, and the heat generation rates inside. Determine the size of the heating and air-conditioning system that will be able to maintain the cabin at 20 °C at all times for an airplane capable of carrying 400 people.

1.How can i know the right frequency for operating any ferrite Core transformer that i have winded? 2. Enlighten me as to how to calculate for primary turns and voltage, and secondary turns and voltage.