Related Questions

In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said to have the same hydraulic roughness, when they have equal values of
A Relative roughness
B Absolute roughness
C Friction co-efficient for flows at equal Reynold number
D All of the above
Moisture content in the soil _______ the earth soil resistance
A increase
B decrease
C does not affect
D none of the above
On which of the following factors the number of phases for which a rectifier should be designed depends?
A The voltage regulation of the rectifier should be low
B In the output circuit there should be no harmonics
C The power factor of the system should be high
D All of the above
The value of exciting or magnetizing current depends upon which of the following factors ?
A Total m.m.f. required
B The number of turns in the exciting winding
C The way in which the winding is distributed
D All of the above
On which of the following factors skin effect depends?
A Frequency of the current
B Size of the conductor
C Resistivity of the conductor material
D All of the above
The selection of an electric motor for any application depends on which of the following factors?
A Electrical characteristics
B Mechanical characteristics
C Size and rating of motors
D All of the above
The capacity of a belt conveyor depends upon two factors. If one is the cross-section of the load, the other is the __________ of the belt.
A Speed
B Thickness
C Length
D None of these
If all the factors of productions are increased in a fixed proportion , volume of production increase proportion which is greater than the proportion of increase in the factors of production -this state can be described most appropriately by -
A Proportionate return to scale
B Disproportionate return of scale
C Increasing return to scale
D Law of scale
It all the factors of productions are increased in a fixed proportion, volume of production increase proportion which is greater than the proportion of increase in the factors of production this state can be described most appropriately by-
A Proportionate return to scale
B Disproportionate return of scale
C Increasing return to scale
D Law of scale
Which of the following factors is one of the environmental factors affecting job description:
A Workflow and culture
B Autonomy and feedback
C Employee availability and abilities
D Culture and diversity

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