Mechanical Engineering Answers

A tank is filled with 0.025 m3 of refrigerant 134-a refrigerant in the form of saturated liquid at 0.9 MPa on one side. The refrigerant then fills up the entire tank and it becomes 25 °C and 300 kPa. Calculate the total volume of the tank.

12) A heat engine operates between a source at 550°C and a sink at 25°C. If heat is supplied

tothe heat engine at a steady rate of 1200 kJ/min, determine the maximum power output

of this heat engine.

find the form factor and peak factor of the triangular wave shown in fig.11.38

an alternating voltage of 200 sin 471 t is applied to h.w rectifier which is in series with a resistance of 40 ohms. if the resistance of the rectifier is infinite in one direction and zero in the other. find the RMS value of the current drawn from the supply source

determine the power consumption under uniform acceleration

Design a project to determine the specifications (unstretched length) spring constant k as 100N/m for the elastic cord to be used at a bungee-jumping facility. Participants are to jump from a platform 45m above the ground. When they rebound, they must avoid an obstacle that extends 5 m below the point at which they jump. In determining the specifications for the cord, establish reasonable the safety limits for the minimum distances by which participants must avoid the ground and obstacle. Account for the fact that participants will have different weight. (Specify a maximum allowable weight for participants of 100kg, and Maximum height of 1.7m)

A gear drive consists of two gears, A and B, and has a velocity ratio of 1.50. Gear A, the

smaller of the two gears, revolves at 126 rpm in the clockwise direction, and has 28 teeth.

If the gears have a module of 2 mm, determine:

i)

The number of teeth on Gear B.

ii)

The pitch (reference) diameters for the two gears.

iii) The addendum.

iv) The dedendum.

v)

The circular pitch.

vi) The tooth thickness.

vii) The speed of Gear B.

viii) The theoretical centre distance of the two gears.

xt: In the figure shown, the end 'A' of a bar AB is constrained to move along Vertical path AD and the bar passes through a swivel bearing pivoted at C. When A has a velocity of 3 m/s towards D, determine velocity of sliding of the bar through the swivel and angular velocity of AB. C on AB E at swivel 30 Di 0.4 m

An Aluminium Alloy roller with diameter 25mm and length 50mm rolls on the inside of a cast iron ring

having an inside radius of 100mm, which is 50mm thick. Find the maximum force ‘F’ that can be used if

the maximum pressure is not exceeding 100 Mpa.

A body is projected downward at an angle of 20° with respect to the horizontal(+X axis), from the top of a building 170 m high. Its initial speed is 40 m/s. (a) How long will it take before striking the ground?