Engineering Answers

Traffic intensity is one of the important ratio which gives an insight into the queuing delays.

Discuss traffic intensity and its impact on the queue’s behaviour of a router for the following

cases: (i) Traffic Intensity >1 (ii) Traffic Intensity < 1 (iii) Traffic Intensity =1. (You have to

explain your answer with the help of mathematical equations and graph).

A steady flow system loses 3 kW of heat also loses 20 kW of work. The fluid flows through the system at a steady rate of 70 kg/s. The velocity at inlet is 20 m/s and at outlet it is 10 m/s. The inlet is 20 m above the outlet. Calculate the following.

i. The change in K.E./s (-10.5 kW)

1. An electric kettle with a 2kW heating element has a heat capacity of 400JK1. lkg of water at 20°C is placed in the kettle. The kettle is switched on and it has been found that 13 minutes later, the mass of the water in it is 0.5kg. Ignoring the heat losses calculate the value of the specific latent heat of vaporisation of the water, Specific heat capacity of water:4200J

An electric kettle with a 2kW heating element has a heat capacity of 400JK1. lkg of water at 20°C is placed in the kettle. The kettle is switched on and it has been found that 13 minutes later, the mass of the water in it is 0.5kg. Ignoring the heat losses calculate the value of the specific latent heat of vaporisation of the water, Specific heat capacity of water:4200J

Two forces P and Q act at an angle of 120° with each other. If the resultant is at right angles to Pand P is equal to 4kg -wt, then the value of Q is

A

4 kgwt

B

8 kgwt

C

6 kgwt

D

3 kgwt

The resultant of two forces 3P and 2P is R if the first force is doubled then the resultant is also doubled. the angle between the two forces is 

A

60∘

B

120∘

C

70∘

D

180∘