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From an alloy, two specimens are machined and tested separately under tension and compression. The engineering stress-strain curves as well as the true stress-true strain curves for tension and compression are plotted in the same diagram. Identify the correct statements:
P. The engineering stress-strain curves in tension and compression are identical.
Q. The true stress-true strain curve in compression is lower than the true stresstrue strain curve in tension due to Bauschinger effect.
R. The true stress-true strain curve in tension is above the corresponding engineering stress-strain, curve.
S. The true stress-true strain curve in tension and compression are identical.
Which of the following are true? a. The most widely used inductive transducer is the Linear Variable Differential transducer. b. LVDT consists of single primary and two secondary windings in series opposition. c. Linearity of 0.05 is available in commercial LVDT. d. LVDT is sensitive to stray magnetic fields.
Consider the following transducers: 1. LVDT 2. Piezoelectric 3. Thermocouple 4. Photovoltaic cell 5. Strain gauge Which of these are active transducers?
The following data pertains to the junction of a thermocouple wire used to measure the temperature of the gas stream. Density = 8500 kg/m3, specific heat = 325 J/kg K, thermal conductivity = 40 W/m K and the heat transfer coefficient between the junction and gas = 215 W/m2 K. If thermocouple junction can be approximated as 1 mm diameter sphere, determine how long it will take for the thermocouple to read 99% of the initial temperature difference
A thermocouple junction in the form of 4 mm radius sphere is to be used to measure the temperature of a gas stream. The junction is initially at 35 degree Celsius and is placed in a gas stream which is at 300 degree Celsius. The thermocouple is removed from the hot gas stream after 10 seconds and kept in still air at 25 degree Celsius with convective coefficient 10 W/m2 K. Find out the time constant of the thermocouple. Assume the thermos-physical properties as given below h = 37.5 W/m2 K p = 7500 kg/m3 c = 400 J/kg K
The true strain rate is given as ϒ, and conventional strain rate is given as ε. The engineering strain is equal to e. The relationship between conventional strain rate and true strain rate is _______
Which of the following option is correct for given statements? Statement 1: Slip gauge and its accessories can be used as a limit gauge. Statement 2: Slip gauge and accessories can be used for the measurement of plug gauge but not for ring gauges.
Which of the following statements is/are true about the types of gauge in Indian Railways? I. In Broad gauge. the clear distance between the inner faces of two rails is 1.676 m II. In Meter gauge. the clear distance between the inner faces of two rails is 1.240 m III. In Narrow gauge. the clear distance between the inner faces of two rails is 0.762 m
Consider the following transducers: 1. LVDT 2. Thermocouple 3. Piezo electric 4. Photovoltaic cell Which of the above are Active transducers?
Consider the following transducers: 1. LVDT 2. Piezoelectric 3. Thermocouple 4. Photovoltaic cell Which of the above are active transducers?