Objective Questions on Mechanical Engineering
13-A space lattice found in alpha-iron is called
(A) body centred cubic space lattice
(B) face centred cubic space lattice
(C) close packed hexagonal space lattice
(D) none of the above
14-The use of regeneration in a gas turbine cycle increases:
(A) Efficiency but has no effect on output
(B) Output but has no effect on efficiency
(C) Both efficiency and output
(D) None
15-The equation used for experimental measurement of viscosity is:
(A) Darcy equation
(B) Stokes equation
(C) Fanning equation
(D) Hagen Poiseuille equation
16-Bernoullis equation is derived starting from:
(A) Mass Balance
(B) Force Balance
(C) Momentum Balance
(D) Energy Balance
17-Orificemeter is used for measuring:
(A) Pressure
(B) Flow rate
(C) Density
(D) Viscosity
18-Froude number is directly proportional to
(A) Impeller speed
(B) Fluid viscosity
(C) Square of impeller diameter
(D) Square of impeller speed
19-In order to have maximum power from a Pelton turbine, the bucket speed must be:
(A) Equal to the jet speed
(B) Equal to half of jet speed
(C) Equal to twice the jet speed
(D) Independent of the jet speed
20-Steady flow occurs when:
(A) velocity does not change
(B) pressure does not change
(C) conditions change gradually with time
(D) conditions do not change with time at any point
21-When the pressure of water increase, its volume:
(A) Increases
(B) Don’t change
(C) Decreases
(D) None of the above
22-Psi in terms of pressure stands for:
(A) Pressure Square Inch
(B) Per Square Inch
(C) Pounds Per Square Inch
(D) Perpendicular Square Inch
23-Rotameter is used to measure:
(A) Level
(B) Pressure
(C) Volume
(D) Flow
24-Dall Tube is another variation of:
(A) Pitot tube
(B) Flow nozzle
(C) Venturi Tube
(D) Annular Tube
ANSWERS:
13-(A), 14-(A), 15-(B), 16-(D), 17-(B), 18-(A), 19-(B), 20-(D), 21-(B), 22-(C), 23-(D), 24-(C)