# 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)**