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Home » Engineering » Aptitude Test - 105
Hassan
1.The _____ pressure is measured by a static tube?
A. Dynamic
B. Static
C. Static
D. Dynamic
2.Pascal law is not applicable for a/an ______fluid?
A. Accelerating frictionless
B. Static
C. Total
D. Accelerating frictionless
3.Pascal law is not applicable for a/an _________ fluid?
A. Accelerating frictionless
B. Uniformly moving
C. Static
D. Accelerating frictionless
4._____________ pump is the most suitable device for discharging a liquid against a pressure of ? 1500 kgf/cm2?
A. Centrifugal
B. Piston
C. Plunger
D. Centrifugal
5.In a/an _____________, the flow rate of fluids is obtained by measuring the difference between the impact and the static pressure?
A. Rotameter
B. Venturimeter
C. Pitot tube
D. Rotameter
6.The fluid velocity varies as the square root of the cylindrical pipe diameter in case of steady state laminar flow at constant pressure drop of ____ fluid?
A. Dilatent
B. Pseudo-plastic
C. Bingham plastic
D. Dilatent
7.Bernoulli’s equation is not applicable, when the flow is___?
A. Irrotational
B. Incompressible
C. Viscous
D. Irrotational
8.Horsepower increase of a centrifugal gas compressor without altering the volumetric flow rate will _______ the gas discharge pressure?
A. Increase
B. Decrease
C. Not change
D. Increase
9.Newton’s law of viscosity relates the______?
A. Shear stress and velocity
B. Velocity gradient and pressure intensity
C. Pressure gradient and rate of angular deformation
D. Shear stress and velocity
10.Which is the most efficient and best for measuring very small flow rate of gases ?
A. Venturimeter
B. Orificemeter
C. Rotameter
D. Venturimeter
11.For laminar flow of a fluid through a packed bed of spheres of diameter d, the pressure drop per unit length of bed depends upon the sphere diameter as___?
A. d
B. d2
C. d4
D. d
12.For laminar flow of Newtonian fluid in a circular pipe, the velocity distribution is a function of the distance ‘d’ measured from the centre line of the pipe, and it follows a ____ relationship?
A. Logarithmic
B. Parabolic
C. Hyperbolic
D. Logarithmic
13.What is the shear rate at the pipe wall, in case of laminar flow of Newtonian fluids in a pipe of diameter ‘D’ & length ‘L’ incurring a pressure drop ‘?p’ with average velocity ‘Vavg’ ?
A. D ?p/8L
B. D ?p/4L
C. 8 Vavg/D
D. D ?p/8L
14.For turbulent flow of Newtonian fluid in a circular cross-section pipe, the ratio of maximum to average fluid velocity is ____?
A. 0.5
B. 1
C. 0.66
D. 0.5
15.In Newton’s law range, the drag co-efficient for the motion of spherical particle in a stationary fluid is____?
A. 0.44
B. 0.044
C. 4.4
D. 0.44
16.A tube is specified by its_____?
A. Thickness only
B. Outer diameter only
C. Inner diameter
D. Thickness only
17.Poise is converted into stoke by _?
A. Multiplying with density (gm/c.c)
B. Dividing by density (gm/c.c)
C. Multiplying with specific gravity
D. Multiplying with density (gm/c.c)
18.Slurries can be most conveniently pumped by a ______ pump?
A. Screw
B. Reciprocating
C. Gear
D. Screw
19.Caking index of a coal is a measure of its __?
A. Abradability
B. Reactivity
C. Porosity
D. Abradability
20.Main component of sewage gas produced during anaerobic decomposition of organic waste (by suitable bacteria) during sewage disposal is ____?
A. H2
B. CH4
C. CO2
D. H2
21.The shift conversion reaction taking place during water gas manufacture is given by_____?
A. C + H2O ? CO + H2
B. C + 2H2O ? CO2 + 2H2
C. CO + H2O ? CO2 + H2
D. C + H2O ? CO + H2
22.___ of the coal is the basis for Seylor’s coal classification?
A. Proximate analysis
B. Ultimate analysis
C. Caking index
D. Proximate analysis
23.In case of pulverised coal fired steam boiler, the secondary air serves the main purpose of___?
A. Transportation of coal
B. Drying of coal
C. Preheating the primary air
D. Transportation of coal
24.In flue gas analysis by Orsat’s apparatus, carbon monoxide is absorbed by___?
A. Cuprous chloride
B. Potassium hydroxide
C. Alkaline pyrogallol solution
D. Cuprous chloride
25.Washing of coal decreases its___?
A. Caking index
B. Ash content
C. Mineral matter content
D. Caking index
26.To avoid fire by spontaneous combustion of coal due to its low temperature oxidation, it should be stored in__?
A. Shallow and small piles
B. Fine sizes without the presence of any lump
C. Closed space without any ventilation facility
D. Shallow and small piles
27.The gas which contributes maximum to the heating value of natural gas is?
A. CO
B. CO2
C. H2
D. CO
28.Nitrogen in coal____?
A. Is present upto 1-2%
B. Comes from protein in parent vegetable matter
C. Is recovered as ammonia during its carbonisation
D. Is present upto 1-2%
29.A coal having high volatile matter content will __?
A. Give less yield of tar and gas on carbonisation
B. Burn with a small non-smoky flame
C. Have a very high calorific value
D. Give less yield of tar and gas on carbonisation
30.Mott and Wheeler test is conducted on coke to find its ___?
A. Reactivity with O2
B. Abradability
C. Phosphorus content
D. Reactivity with O2
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