Ask a New Question
Search
Questions and answers by
Adivhaho muremi
Questions (21)
A single-stage, three-cylinder piston air compressor with a diameter of 180 mm and a stroke length of 2500 mm per cylinder runs
1 answer
4 views
QUESTION 3
A single-acting, single-cylinder air compressor has a clearance volume which is 6% of the stroke volume. The air is
1 answer
4 views
A gas of standard temperature and pressure (STP) has a mass of 1,1 kg. The gas undergoes an isothermal process to 780 kPa. Take
1 answer
8 views
1. A single acting reciprocating air compressor has a stroke length of
300 mm and a diameter of 200 mm. The air is drawn in at a
1 answer
9 views
Calculate the force exerted by the ram piston if an effort of 200 N is applied to the lever of a hydraulic press.
The mechanical
1 answer
7 views
Find the smallest diameter bolt that can be used in a clevis if the shearing strength of
the bolt is 400 MPa and F = 380 kN.
1 answer
9 views
Calculate the force required to punch a 15 mm diameter hole into a plate 20mm thick, if the shear strength is 300 MN/m.
1 answer
8 views
A glass flask is filled with 35 cm' mercury at a temperature of 20 °C. The temperature is increased to 50 °C. The linear
1 answer
4 views
A square metal plate with sides 2,5 m long and at a temperature of 32 °C has a hole with a diameter of 850 mm in the centre.
1 answer
3 views
12. A steel ball has a diameter of 60 mm and is 0,01 mm too large to pass through a hole in a brass plate when the ball and the
1 answer
12 views
2.
4,54 kg gas is compressed at a constant temperature of 432 K from 103,4 kPa to 3 102 kPa. The gas constant R is 0,3 kJ/kg.K.
1 answer
6 views
1. Calculate the work done when 1,36 kg of gas is compressed isothermally from 138 kPa to 1 380 kPa. Isothermal temperature is
1 answer
8 views
7. The temperature of a right rectangular prism of carbon steel with dimensions
70 × 130 x 10 mm is increased by 45 °C. The
1 answer
6 views
6. A piece of wire, original length 120 mm, is heated from 20 °C to 95 °C. If the final length of wire is 120,324mm .
1 answer
11 views
A metal plate is a 1m square at 283K. There is a hole of 600mm in diameter in the centre. The linear coefficient of expansion of
1 answer
6 views
Supply water at a temperature of 32 °C is fed into a boiler working at a pressure of 2 200 kPa. The steam is superheated to a
1 answer
6 views
A gas of 1 kg mass is expanded polytropically from an initial pressure of 1 300 kPa and a temperature of 250 °C until it
1 answer
13 views
Heat is added to a cylinder that contains air at with an absolute pressure of 200 kPa and a temperature of 27 °C. The initial
1 answer
10 views
A 60-mm diameter shaft is connected to a vehicle transmission by means of a splined connection. The number of splines cut into
1 answer
11 views
A model boiler must be built for Matimba Power Station, which is one of the major
electricity-generating power stations in South
2 answers
10 views
Calculate the torque to increase the speed of a flywheel with a mass of 1 300 kg and a radius of gyration of 810 mm from 110
1 answer
22 views
Answers (1)
Data: t = 10 mm; n = 2; p = 60 mm; o+ = - 300 - МРа = 105 МРа ; т = — МРа = 75 МРа 0c = 600 - MPa = 150 MPa d = 20mm 4 Solution: 1.1 The efficiency of the joint: F+ = (p - d)to+-p = (60 - 20)(10) (105) = 42 kN Fs=Fa7TR=(20) (75) (2) = 47,124
