341.When the pitching of a ship is upward, the effect of gyroscopic couple acting on it will be
(A) to raise the bow and lower the stern
(B) to move the ship towards star-board
(C) to move the ship towards portside
(D) to raise the stern and lower the bow.
Answer: -to move the ship towards star-board
342.The buoyant force for a floating body passes through the
(A) Centroid of the displaced volume
(B) Centre of gravity of the body
(C) Centroid of volume of the body
(D) Meta-centre of the body
Answer: -Centroid of the displaced volume
343.The Otto cycle consists of
(A) two constant pressure processes and two constant volume processes
(B) two constant pressure and two constant entropy processes
(C) two constant volume processes and two constant entropy processes
(D) none of the mentioned
Answer: -two constant pressure and two constant entropy processes
344.Pascal second is the unit of
(A) Drag
(B) Dynamic viscosity
(C) Kinematic viscosity
(D) Pressure
Answer: -Dynamic viscosity
345.The standard atmospheric pressure (at sea level) is not equal to
(A) 760 mm Hg
(B) 18.2 m of benzene
(C) 10.3 m of H20
(D) 101.325 kPa
Answer: -18.2 m of benzene
346.Which of the following criteria need to be fulfilled for making two different pipe systems equivalent?
(A) Same length and diameter
(B) Same discharge and length
(C) Same pressure loss and discharge
(D) Same velocity and diameter
Answer: -Same pressure loss and discharge
347.Engine of different cylinder dimensions, power and speed are compared on the basis of
(A) Maximum pressure
(B) Fuel consumption
(C) Mean effective pressure
(D) Unit power
Answer: -Mean effective pressure
348.The mean effective pressure of an Otto Cycle increases with an increase in
(A) pressure ratio
(B) compression ratio
(C) temperature ratio
(D) none of the mentioned
Answer: -compression ratio
349.Inlet valve Mach index usually relates
(A) Mechanical efficiency
(B) Volumetric efficiency
(C) Brake thermal efficiency
(D) Relative efficiency
Answer: -Volumetric efficiency
350. In Otto cycle, heat addition takes place at
(A) constant temperature
(B) constant pressure
(C) none of the mentioned
(D)constant volume
Answer: -constant volume
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