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Which of the following are the basic differences between vibration signature and noise signature? 1. Vibration signature is essentially in the frequency range zero to 100 cps whereas noise signature is in the range 20 cps to 3000 cps. 2. Vibration signature has well-defined peaks whereas the noise signal is smeared. 3. The intensities of noise signatures arc much less than that of vibration signatures. 4. Detection of vibration signature calls for a microphone whereas that of noise can do with a pickup. Select the correct answer using the code given below.
Statement: Resonance is a special case of forced vibration in which the nature and frequency of vibration of the body are the same as the impressed frequency and the amplitude of forced vibration, is maximum. Reason: The amplitude of forced vibrations of a body increases with an increase in the frequency of the externally impressed periodic force.
In a DC machine, rectification process is carried out in order to get unidirectional output (DC). This rectification process is carried out by ______________
Statement 1: Rectification involves the liquid and vapors to pass a cascade of stages. Statement 2: In rectification, both heat and mass transfer takes place till equilibrium is reached.
Which of the following is the correct statement?
1. The slope of the Isoquants represents the MRTS
2. The MRTS of the inputs x and y = $$\frac{{{\text{M}}{{\text{P}}_{\text{x}}}}}{{{\text{M}}{{\text{P}}_{\text{y}}}}}$$
3. The elasticity of substitution between two inputs x and y is proportionate change in the ratio of two inputs divided by proportionate change in the MRTS
4. If degree of homogeneity is greater than one, the production function is increasing returns to fixed factor
There are two types of inputs to a process besides the raw material. That are controllable inputs and _____ inputs.
Consider the following provision in Section 300 of the Indian Penal Code:
Several culpable states of mind are referred to with the:
1. intention to cause death
2. knowledge that the act is so imminently dangerous that it must in all probability cause death
3. intention to cause such bodily injury as the offender know to be likely to cause death of the person to whom harm is caused
4. intention of causing such bodily injury as is sufficient in ordinary course of nature to cause death.
The correct order of the sequence in which they are placed in the provision is:
Permanent magnet loses the magnetic behaviour when heated because of 1. atomic vibration 2. dipole vibration 3. realignment of dipoles Which of the above are correct?
There are four samples P, Q, R and S with natural frequencies 64, 96, 128 and 250 Hz respectively. They are mounted on test setups for conducting vibration experiments. If a loud pure note of frequency 144 Hz is produced by some instrument, which of the samples will show the most perceptible induced vibration?
The vibration isolation for a forced vibration system is possible, when: