Lakshya Education MCQs

Question: The most serious disadvantage of an orificemeter is that
A.It is not very accurate
B.It is very costly
C.Most of the pressure drop is not recoverable
D.It is not suitable for measuring gas flow
Answer: Option C

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More Questions on This Topic :

Question 1. Reciprocating pumps are not able to compete with the centrifugal pump for industrial use, mainly because these pumps have
  1.    Very low speeds
  2.    Smaller discharge
  3.    Higher capital &maintenance cost
  4.    High vibrations
Answer: Option C
Question 2. Propeller type centrifugal pumps are most suitable for
  1.    High capacity at high heads
  2.    High capacity at low heads
  3.    Low capacity at high heads
  4.    Low capacity at low heads
Answer: Option B
Question 3. The pipe wall thickness is minimum for a pipe of given nominal size having schedule number
  1.    160
  2.    120
  3.    80
  4.    40
Answer: Option D
Question 4. For a reciprocating pump, the indicator diagram is the graph between the
  1.    Discharge and overall efficiency
  2.    Volume swept by piston for one complete revolution and the pressure in the cylinder
  3.    Angle swept by the crank pin at any instant and the discharge
  4.    None of these
Answer: Option B
Question 5. The ratio of wall drag to total drag in the Stoke's law range is
  1.    0.5
  2.    1
  3.    1/3
  4.    2/3
Answer: Option D
Question 6. Which of the following quantities are computed by using the hydraulic radius for non-circular ducts?
  1.    Velocity and relative roughness
  2.    Head loss and velocity
  3.    Reynold number, relative roughness and head loss
  4.    Reynolds number and friction factor
Answer: Option C

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