০০। A body of dimensions 1.5 m x 1.0 m x 2 m weighs 3000 kg in water. Its specific gravity is
ক) 0.8
খ) 0.9
গ) 1.0
ঘ) 1.1
০১। A closed cylindrical vessel of 100 cm diameter and 200 cm high is completely filled with a liquid (sp. weight 1600 kg/m3) when rotated about its vertical axis at 100 r.p.m. The total pressure on its lid, is
ক) 459 kg
খ) 549 kg
গ) 945 kg
ঘ) 954 kg
ঙ) 95.4 kg.
০২। A cylinder 3 m in diameter and 4 m long retains water one side as shown in the below figure. If the weight of the cylinder is 2000 kgf, the horizontal reaction at B is
ক) 10,000 kgf
খ) 15,000 kgf
গ) 20,000 kgf
ঘ) 18,000 kgf.
০৩। A cylinder 3 m in diameter and 4 m long retains water one side as shown in the below figure. If the weight of the cylinder is 2000 kgf, the vertical reaction at A is
ক) 14,137 kgf
খ) 5,863 kgf
গ) 20,000 kgf
ঘ) 18,000 kgf.
০৪। A cylindrical vessel 40 cm high is revolved about its vertical axis so that the water touches the bottom when it just spills out. If the radius of the cylinder is 5 cm, the angular velocity of rotation, is
ক) 2 rad/sec
খ) 3 rad/sec
গ) 4 rad/sec
ঘ) 5 rad/sec
ঙ) none of these.
০৫। A floating body attains stable equilibrium if its metacentre is
ক) at the centroid
খ) above the centroid
গ) below the centroid
ঘ) anywhere.
০৬। A fluid particle may possess the displacement of
ক) translation
খ) rotation
গ) distortion
ঘ) all the above.
০৭। A jet projected at an angle of 45θ, 40 m from the foot of a vertical column, just reaches the top of the column. The height of the column is
ক) 15 m
খ) 20 m
গ) 30 m
ঘ) 40 m
ঙ) 60 m.
০৮। A load w is rolled a distance d across the deck of a ship of weight W, due to which the ship heels through θ°. The metacentric height of the ship, is
ক)
খ)
গ)
ঘ)
০৯। A non-uniform steady flow is through
ক) a long tube at a decreasing rate
খ) an expanding tube at constant rate
গ) an expanding tube at increasing rate
ঘ) a long pipe at increasing rate.
১০। A nozzle is fitted at the end of a pipe whose length is 320 m and diameter is 10 cm. If the value of f = 0.01, the diameter of the nozzle for the maximum transmission of power through the nozzle is
ক) 2.4 cm
খ) 2.5 cm
গ) 2.6 cm
ঘ) 2.7 cm.
১১। A piezometer opening in pipes measures
ক) velocity head
খ) static pressure
গ) total pressure
ঘ) negative static pressure.
১২। A pipe consisting of several pipes of varying diameters and lengths, may be replaced by an equivalent pipe of diameter D of length
ক)
খ)
গ)
ঘ)
১৩। A pipe of 0.1 m2 cross sectional area suddenly enlarges to 0.3 m2 cross-sectional area. If the discharge of the pipe is 0.3 m3 /sec, the head loss is
ক) 2/g m of water
খ) g/2 m of water
গ) 1g m of water
ঘ) g m of water.
১৪। A pitot tube is used to measure
ক) pressure
খ) difference in pressure
গ) velocity of flow
ঘ) none of these.
১৫। A rectangular channel 6 m wide and 3 m deep and having a bed slope as 1 in 2000 is running full. If Chezy‘s constant C = 54.8, pick up the correct specification of the channel from the following :
ক) hydraulic mean depth = 1.5 m
খ) Velocity of flow = 1.5 m/sec
গ) Rate of flow = 27 m3/sec
ঘ) All the above.
১৬। A rise or fall of liquid in a glass tube of a very small diameter when dipped is
ক) directly proportional to the force per unit length of periphery
খ) direcly proportional to the sine of the angle of contact
গ) directly proportional to the specific weight of liquid
ঘ) inversely proportional to the diameter of the glass tube.
১৭। A short tube mouthpiece will not run full at its outlet if the head under which the orifice works, is
ক) less than 12.2 m of the water
খ) more than 12.2 m of the water
গ) equal of 12.2 m of water
ঘ) none of these.
১৮। A spherical load 900 kg is rolled through 9.8 m across the deck of a ship weighing 10, 000 kg. If the metacentric height of the ship is 5 metres, the angle of heel, is