Practice Pakistan's most useful MCQs for competitive exams

Discharge from a 24 inch pipe of water at 10 ft/sec will be _____________ ft3/sec?

• (A)  7.65
• (B)  32.36
• (C)  48.22
• (D)  125.6

Answer

Submitted By :Ali Uppal

Rubber latex is an example of ______________ fluid?

• (A)  Dilatants
• (B)  Newtonian
• (C)  Pseudo plastic
• (D)  Bingham plastic

Answer

Submitted By :Ali Uppal

Diaphragm pumps are used to transport_________________?

• (A)  Solids
• (B)  Liquids
• (C)  Fluids
• (D)  Slurries

Answer

Submitted By :Ali Uppal

The length of the tube necessary for the boundary layer to reach the centre of the tube and for fully developed flow to be established is called the _____________ length?

• (A)  Equivalent
• (B)  Transition
• (C)  Prandtl mixing
• (D)  None of these

Answer

Submitted By :Ali Uppal

With decrease in particle size to be fluidised by a particular fluid, the operating range of fluidisation velocity___________________?

• (A)  Widens
• (B)  Squeezes
• (C)  Does not change
• (D)  Unpredictable from the data

Answer

Submitted By :Ali Uppal

For very low pressure and high discharge rate, the compressor used is a/an ______________ compressor?

• (A)  Axial
• (B)  Reciprocating
• (C)  Rotary
• (D)  None of these

Answer

Submitted By :Ali Uppal

A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun’s equation for the above fluid-particle system (in SI units) is given below : Δ P/L = 375 × 103 VOM + 10.94 × 106 V2 OM (SI units) If water is to be used as the fluidising medium, the minimum fluidisation velocity, VOM is_________________?

• (A)  12 mm/s
• (B)  16 mm/s
• (C)  24 mm/s
• (D)  28 mm/s

Answer

Submitted By :Ali Uppal

Non-colloidal solution is an example of the _______________ fluid?

• (A)  Non-Newtonian
• (B)  Newtonian
• (C)  Dilatent
• (D)  Pseudo-plastic

Answer

Submitted By :Ali Uppal

One dimensional flow implies________________________?

• (A)  Flow in a straight line
• (B)  Steady uniform flow
• (C)  Unsteady uniform flow
• (D)  A flow which does not account for changes in transverse direction

Answer

Submitted By :Ali Uppal

Out of the following flow measuring devices, which one incurs the maximum installation cost as well as pressure loss ?

• (A)  Flow nozzle
• (B)  Venturimeter
• (C)  Rotameter
• (D)  Orificemeter

Answer

Submitted By :Ali Uppal