Top 1000+ Solved Fluid Mechanics (FM) MCQ Questions Answer
Q. A fluid having no viscosity is known as
a. Real fluid
b. Ideal fluid
c. Newtonian fluid
d. Non-Newtonian fluid
Q. In order to avoid tendency of separation at throat in a Venturimeter, the ratio of the diameter atthroat to the diameter of pipe should be
a. 1/16 to 1/8
b. 1/8 to 1/4
c. 1/4 to 1/3
d. 1/3 to 1/2
Q. Liquids transmit pressure equally in all the directions. This is according to
a. Boyle's law
b. Archimedes principle
c. Pascal's law
d. Newton's formula
Q. The discharge over a triangular notch is
a. Inversely proportional to H3/2
b. Directly proportional to H3/2
c. Inversely proportional to H5/2
d. Directly proportional to H5/2
Q. A flow whose streamline is represented by a straight line, is called __________ dimensional flow.
a. One
b. Two
c. Three
d. Four
Q. The body will float if the force of buoyancy is __________ the weight of the liquid displaced.
a. Equal to
b. Less than
c. More than
d. None of these
Q. Bulk modulus of a fluid __________ as the pressure increases.
a. Remain same
b. Decreases
c. Increases
d. None of these
Q. The coefficient of viscosity may be determined by
a. Capillary tube method
b. Orifice type viscometer
c. Rotating cylinder method
d. All of these
Q. According to Newton's law of viscosity, the shear stress on a layer of a fluid is __________ tothe rate of shear strain.
a. Equal to
b. Directly proportional
c. Inversely proportional
d. None of these
Q. A vessel of 4 m3 contains oil which weighs 30 kN. The specific weight of the oil is
a. 4.5 kN/m3
b. 6 kN/m3
c. 7.5 kN/m3
d. 10 kN/m3
Q. The increase of temperature results in
a. Increase in viscosity of gas
b. No changes in viscosity of liquid
c. Decrease in viscosity of gas
d. Decrease in viscosity of liquid
Q. A manometer is used to measure
a. Low pressure
b. Moderate pressure
c. High pressure
d. Atmospheric pressure
Q. Which of the following meters is not associated with viscosity?
a. Red wood
b. Say bolt
c. Engler
d. Orsat
Q. The specific weight of water in S.I. units is taken as
a. 9.81 kN/m3
b. 9.81 × 103 N/m3
c. 9.81 × 10-6 N/mm3
d. Any one of these