Chemical Engineering Mcqs

All pipes of a particular nominal size have the same_________________?

• (A)  Inside diameter
• (B)  Outside diameter
• (C)  Thickness
• (D)  None of these

Answer

Submitted By :Ali Uppal

What is the co-efficient of contraction, if a fluid jet discharging from a 50 mm diameter orifice has a 40 mm diameter at its vena-contracta ?

• (A)  0.64
• (B)  1.65
• (C)  0.32
• (D)  0.94

Answer

Submitted By :Ali Uppal

For Laminar flow through a packed bed, the pressure drop is proportional to (Vs is the superficial liquid velocity and Dp is the particle diameter) ?

• (A)  Vs/Dp2
• (B)  Vs2/Dp2
• (C)  Vs2/Dp3
• (D)  Vs/Dp3

Answer

Submitted By :Ali Uppal

Vena-contracta formed during flow of a liquid through an orificemeter has__________________?

• (A)  Minimum liquid cross-section
• (B)  More diameter compared to orifice diameter
• (C)  Minimum velocity of fluid stream
• (D)  None of these

Answer

Submitted By :Ali Uppal

The pitot static tube does not measure the _____________ pressure?

• (A)  Static
• (B)  Total
• (C)  Difference in static & dynamic
• (D)  All

Answer

Submitted By :Ali Uppal

The unit of dynamic viscosity in SI unit is__________________?

• (A)  kg/m. sec
• (B)  N/m2
• (C)  m2 /sec
• (D)  m/N. sec

Answer

Submitted By :Ali Uppal

Power loss in an orificemeter is _____________ that in a Venturimeter?

• (A)  Less than
• (B)  Same as
• (C)  More than
• (D)  Data insufficient, cannot be predicted

Answer

Submitted By :Ali Uppal

Which of the following has the minimum compressibility ?

• (A)  Water at room temperature
• (B)  Air at room temperature
• (C)  Oxygen at room temperature
• (D)  Nitrogen at room temperature

Answer

Submitted By :Ali Uppal

In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said to have the same hydraulic roughness, when they have equal values of___________________?

• (A)  Relative roughness
• (B)  Absolute roughness
• (C)  Friction co-efficient for flows at equal Reynold number
• (D)  All

Answer

Submitted By :Ali Uppal

The velocity profile for a Bingham plastic fluid flowing (under laminar conditions) in a pipe is__________________?

• (A)  Parabolic
• (B)  Flat
• (C)  Flat near the wall and parabolic in the middle
• (D)  Parabolic near the wall and flat in the middle

Answer

Submitted By :Ali Uppal