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Tuesday, August 7, 2012

ONGC Test Engineer Mechanics Objective Sample Quiz



ONGC Test Engineer Mechanics Objective Sample Quiz
Geology Model Test Paper
Q.1. A surge tank is provided in the hydro power
schemes is
(a) Strengthen the penstocks
(b) Reduce water hammer pressures
(c) Reduce frictional losses in the system
(d) Minimize cost of hydro-power development
ANSWER: (d)

Q.2. A type of flow in which the fluid particles while
moving in the direction of flow rotate about their
mass centre, is known as
(a) Steady flow
(b) Uniform flow
(c) Laminar flow
(d) Rotational flow
ANSWER: (c)

Q.3. If pressure at any point in the liquid approaches
the vapour pressure, liquid starts vaporizing and creates
pockets or bubbles of dissolved gases and vapors.
This phenomenon is
(a) Surface tension
(b) Adhesion
(c) Vaporization
(d) Cavitations
ANSWER: (a)


Q.4. Fire hose nozzle is generally made of
(a) Divergent shape
(b) Convergent shape
(c) Cylindrical shape
(d) Parabolic shape.
ANSWER: (c)

Q.5. 'Discharge of broad crested weir is maximum in
the head of water on downstream side of weir as compared
to head on the upstream side of the weir is
(a) One-half
(b) One-third
(c) Two-third
(d) Three-fourth
ANSWER: (d)

Q.6. Friction factor for pipes depends on
(a) Rate of flow
(b) Fluid density
(c) Viscosity
(d) Pipe roughness
(e) All of the above
ANSWER: (e)


Q.7. In the case of flow through parallel pipes
(a) Flow in each pipe is same
(b) Head loss in each pipe is same
(c) Head loss depends upon flow conditions
(d) Total head loss is the sum of head losses in
individual pipes
ANSWER: (b)

Q.8. The fluid forces considered in the Navier-Stokes
equation are
(a) Gravity velocity and viscous
(b) Gravity, pressure and turbulent
(c) Pressure, viscous and turbulent
(d) Gravity, viscous and turbulent
ANSWER: (a)

Q.9. Vertical distribution of velocity in an open
channel for laminar flow can be assumed as
(a) Logarithmic
(b) Parabolic
(c) Straight line
(d) Hyperbolic
ANSWER: (b)

Q.10. Power transmitted through a pipe is maximum
when the loss of head due to fiction is
(a) Half of the total head Supplied
(b) One-third of the total head supplied
(c) One-fourth of the total head supplied
(d) Equal to the total head supplied
ANSWER: (b)


Q.11. Hydraulic grade line for any flow system as
compared to energy line is
(a) Above
(b) Below
(c) At same level
(d) Uncertain
ANSWER: (b)

Q.12. The effects of negative pressure beneath the
nape in case of flow of water over a rectangular
suppressed weir is to
(a) Decrease the discharge
(b) Increase the discharge
(c) Increase frictional resistance
(d) Reduce frictional resistance
ANSWER: (b)

Q.13. Principle, ‘Buoyancy’ is equal to the weight of
the fluid displaced and the line of action is through the
cetroid of the displaced mass’ is known as
(a) Law of buoyancy
(b) Newton’s law
(c) Archimedes principles
(d) All of the above
ANSWER: (c)

Q.14. Pressure drag results from
(a) Skin-friction
(b) Deformation drag
(c) Development of a stagnation point
(d) Occurrence of a wake
ANSWER: (d)

Q.15. For a supersonic flow, velocity
(a) Increases with decrease in area of flow
(b) Increases with increase in area of flow
(c) Does not change with variation in the area of flow
(d) None of the above
ANSWER: (b)

Q.16. Choking in pipe flow implies
(a) No flow occurs
(b) Negative flow takes place due to water hammer
(c) Valve in pipeline is closed
(d) Specified mass flow can’t occur
ANSWER: (b)

Q.17. for similarly, in addition to models being
geometrically similar to prototype, the following
in both cases should also be equal
(a) Ratio of inertial force to force due to viscosity
(b) Ratio of inertial force to force due to gravitation
(c) Ratio of inertial force to force due to surface tension
(a)    All the four ratios of inertial force to force due
to viscosity, gravitation surface tension, and elasticity
ANSWER: (b)

Q.18. Vertical component of pressure force on a
submerged curve surface is equal to
(a) Weight of liquid vertically above the curved
surface and extending upon the free surface
(b) Force on a vertical projection of the curved surface
(c) Product of pressure at cetroid and surface area
(d) Horizontal component
ANSWER: (a)

Q.19. For a flow to be rotational velocity normal to
the plane of area should be equal to the
(a) Angular velocity vector
(b) Half the angular velocity vector
(c) Twice the angular velocity vector
(d) Zero
ANSWER: (c)

Q.20. During the opening of valve in a pipe line, the flow is
(a) Steady
(b) Unsteady
(c) Uniform
(d) Laminar
ANSWER: (b)

Q.21. All the terms of energy in Bernoulli’s equation
have dimension of
(a) Energy
(b) Work
(c) Mass
(d) Length
ANSWER: (d)

Q.22. Loss of head due to Fiction in pipe of uniform
diameter with viscous flow is equal to
(a) Reynolds number (Re)
(b) 1 / Re
(c) 4/ Re
(d) 16/ Re
ANSWER: (d)

Q.23. In case the velocity vector at different  points
along a stream line remains unchanged, then the flow
is termed as
(a) Stake’s flow
(b) Uniform flow
(c) Rotational flow
(d) Irrigational flow
ANSWER: (b)

Q.24. Gradually varied flow is
(a) Steady uniform flow
(b) Steady non-uniform flow
(c) Unsteady uniform flow
(d) Unsteady non-uniform flow
ANSWER: (b)

Q.25. A fluid in which resistance to deformation is
independent of the shear stress, is known as
(a) Bingham plastic fluid
(b) Pseudo plastic fluid
(c) Dilatant fluid
(d) Newtonian fluid
ANSWER: (d)

3 comments:

  1. 4rth question answer is wrong. Shape of fire hose nozzle is CONVERGENT

    ReplyDelete
  2. Second also wrong the correct answer is the rotational flow

    ReplyDelete
  3. Question 3 also wrong...Right answer is cavitation

    ReplyDelete