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Mechanical Engineering - Practice Test - 48

Q1:

What is the function of frequency analyzer?
 

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Q2:

Which of the following methods can be used to control the noise level at source?
 

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Q3:

Which of the following statements is/are true for elastomers?
 

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Q4:

Which of the following statements is/are false for pneumatic isolators ?
 

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Q5:

A vibrating machine of 100 kg is mounted on a rubber pad which has stiffness of 500 N/m. Determine force transmitted to the foundation if the unbalanced force 500 N acts on it. The frequency ratio (ω/ωn) is 1.5 and ξ = 0.5 
 

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Q6:

Transmissibility is the ratio of ______
 

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Q7:

What is the function of the controller in active vibration isolation systems?
 

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Q8:

Temperature monitoring technique uses which of the following devices to measure temperature of the machining surfaces?
 

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Q9:

Which of the following statements is true about stroboscope?
 

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Q10:

Which type of frequency measuring instrument has multiple reeds of different natural frequency to measure vibrations?
 

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Q11:

Which type of instruments do not require separate power source for measuring vibratory response of a vibratory system?
 

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Q12:

Which of the following instruments measure amplitude of a vibrating body?
 

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Q13:

The motion of a system executing harmonic motion with one natural frequency is known as _______
 

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Q14:

What is meant by coupled differential equation?
 

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Q15:

Which one of the following helps in avoiding cavitation in centrifugal pumps?
 

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Q16:

Which one of the following is the purpose of a surge tank in a Pelton turbine station?
 

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Q17:

A jet of water issues from a nozzle with a velocity of 20 m/s and it impinges normally on a flat plate moving away from it at 10m/s. If the cross sectional area of the jet is 0.02m2 and the density of water is taken as 1000 kg/m2, then the force developed on the plate will be

 

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Q18:

. In the case of pelton turbine installed in a hydraulic power plant, the gross head available is the vertical distance between
 
 

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Q19:

A hydraulic couplings belongs to the category of
 

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Q20:

For pumping molasses, it is preferable to employ
 

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Q21:

. In case of a centrifugal pump, cavitation will occur if
 

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Q22:

Work sampling is applied for

 

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Q23:

Cavitation in a centrifugal pump is likely to occur at the

 

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Q24:

Basic tool in work study is
 

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Q25:

Manometric efficiency of a centrifugal pump is defined as the ratio of
 

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