QID 851 - Hydraulic grade line for any flow system as compared to

energy line is .1) Above

2) Below

3) At same level

4) UncertainCorrect Answer: Below

energy line is .1) Above

2) Below

3) At same level

4) UncertainCorrect Answer: Below

QID 852 - To avoid vaporization in the pipe line, the pipe line over the ridge is laid such that it is not

more than .

1) 2.4 m above the hydraulic gradient

2) 6.4m above the hydraulic gradient

3) 10.0 m above the hydraulic gradient

4) 5.0 m above the hydraulic gradientCorrect Answer: 2.4 m above the hydraulic gradient

2) 6.4m above the hydraulic gradient

3) 10.0 m above the hydraulic gradient

4) 5.0 m above the hydraulic gradientCorrect Answer: 2.4 m above the hydraulic gradient

QID 853 - The locus of elevations that water will rise in a series of pitot

tube is called .1) Hydraulic grade line

2) Pressure head

3) Energy grade line

4) Head lossCorrect Answer: Energy grade line

tube is called .1) Hydraulic grade line

2) Pressure head

3) Energy grade line

4) Head lossCorrect Answer: Energy grade line

QID 854 - Pressure in Pascals at a depth of 1 m below the free surface

of a body of water will be equal to .

1) 1 Pa2) 98.1 Pa3) 981 Pa4) 9810 PaCorrect Answer: 9810 Pa

QID 855 –Water flows up a tapered pipe as shown in the figure. What is

the magnitude of the defection of the differential mercury manometer

corresponding to a discharge of 126L/s?

The friction in the pipe can b completely neglected.

1) 16.28 cm2) 17.28 cm3) 19.28 cm4) 25.28 cmCorrect Answer: 19.28 cm

QID 856 - If a pump is handling water and is discharging a certain flow

Q at a constant total dynamic head requiring a definite B.H.P., the same

pump when handling a liquid of specific gravity 0.75 and viscosity

nearly same as of water would discharge

1) same quantity of liquid2) 0.75Q3) Q/0.754) 1.5QCorrect Answer: same quantity of liquid

QID 857 - A 20 cm diameter pipe 5000 metres long conveys 0.05 cumec

of water which is to be pumped through a height of 6 metres. What is

the horse power required by the pump, if its efficiency is 75

% ?(take 4f = 0.006)1) 74.2 HP

2) 74 HP

3) 75 HP

4) 50 HPCorrect Answer: 74.2 HP

QID 858 - For laminar flow in a pipe, V is equal to1) Umax

2) 0.5 Umax

3) 0.25 Umax

4) 2 UmaxCorrect Answer: 0.5 Umax

QID 859 - Water at 20° C flowing through a 20 cm diameter pipe. Take

kinematic viscosity of water at 20°C is equal to 0.0101 stoke. Assume

that the changes from laminar to turbulent at Re = 2320.

The critical velocity will be . 1)

1.117 cm/sec2) 11.17 cm/sec3) 111.7 cm/sec4) 1.117 m/secCorrect Answer: 1.117 cm/sec

QID 860 - Surge wave is an example of .1) Steady uniform flowof a body of water will be equal to .

1) 1 Pa2) 98.1 Pa3) 981 Pa4) 9810 PaCorrect Answer: 9810 Pa

QID 855 –Water flows up a tapered pipe as shown in the figure. What is

the magnitude of the defection of the differential mercury manometer

corresponding to a discharge of 126L/s?

The friction in the pipe can b completely neglected.

1) 16.28 cm2) 17.28 cm3) 19.28 cm4) 25.28 cmCorrect Answer: 19.28 cm

QID 856 - If a pump is handling water and is discharging a certain flow

Q at a constant total dynamic head requiring a definite B.H.P., the same

pump when handling a liquid of specific gravity 0.75 and viscosity

nearly same as of water would discharge

1) same quantity of liquid2) 0.75Q3) Q/0.754) 1.5QCorrect Answer: same quantity of liquid

QID 857 - A 20 cm diameter pipe 5000 metres long conveys 0.05 cumec

of water which is to be pumped through a height of 6 metres. What is

the horse power required by the pump, if its efficiency is 75

% ?(take 4f = 0.006)1) 74.2 HP

2) 74 HP

3) 75 HP

4) 50 HPCorrect Answer: 74.2 HP

QID 858 - For laminar flow in a pipe, V is equal to1) Umax

2) 0.5 Umax

3) 0.25 Umax

4) 2 UmaxCorrect Answer: 0.5 Umax

QID 859 - Water at 20° C flowing through a 20 cm diameter pipe. Take

kinematic viscosity of water at 20°C is equal to 0.0101 stoke. Assume

that the changes from laminar to turbulent at Re = 2320.

The critical velocity will be . 1)

1.117 cm/sec2) 11.17 cm/sec3) 111.7 cm/sec4) 1.117 m/secCorrect Answer: 1.117 cm/sec

2) Steady non-uniform flow

3) Unsteady uniform flow

4) Unsteady non-uniform flowCorrect Answer: Unsteady non-uniform flow

QID 861 - Quick return mechanism is an inversion of .1) Four bar chain

2) Single slider crank chain

3) Double slider crank chain

4) Crossed slider crank chainCorrect Answer: Single slider crank chain

• Inversion of 4 bar mechanism-• Coupling rod of locomotive• Bam engine• Watt’s Indicator• Inversion of Slider Crank mechanism• Reciprocating engine• Whitworth quick return mechanism• Crank and slotted lever mechanism• Hand pump, bull engine• Inversion of double slider crank mechanism• Elliptical trammel• Scotch yoke mechanism• Oldham coupling

QID 862 - In gears, interference takes place when .1)Tip of a tooth of a mating gear digs into the portion between base and

root circles

2)Gears do not move smoothly in the absence of lubrication

3)Pitch of the gear is not same

4)Gear teeth are undercutCorrect Answer: Tip of a tooth of a mating gear digs into the portion

between base and root circles

QID 863 - In a multiple V belt drive, when a single belt is damaged, it is

preferable to change the complete set to .1) Reduce vibration

2) Reduce slip

3) Ensure uniform loading

4) Ensure proper alignmentCorrect Answer: Ensure proper alignment

QID 864 - The centre of gravity of the coupler link in a 4-bar

mechanism wouldexperience .1) No acceleration

2) Only linear acceleration

3) Only angular acceleration

4) Both linear and angular accelerationsCorrect Answer: Both linear and angular accelerations

QID 865 - The amplitude of underdamping a small damping varies with

time as .1) Linearly

2) Arithmetically

3) Geometrically

4) ExponentiallyCorrect Answer: Exponentially

QID 866 - Whirling speed of a shaft coincide with the natural frequency

of the .1) Longitudinal vibration

2) Transverse vibration

3) Torsional vibration

4) Coupled between torsional vibrationCorrect Answer: Transverse vibration

QID 867 - A mass of 1 kg is attached to the end of a spring with stiffness

0.7 N/mm. The critical damping coefficient of this system is

.

1) 1.40 Ns/m2) 18.522 Ns/m3) 52.92 Ns/m4) 529.20 Ns/mCorrect Answer: 52.92 Ns/m

QID 868 - Rankine's theory of failure is applicable for which of the

following type ofmaterials?1) Brittle

2) Ductile

3) Elastic

4) PlasticCorrect Answer: Brittle

QID 869 - The shock absorbing capacity of a bolt can be increased by

.1) Tightening it properly

2) Increasing shank diameter

3) Grinding the shank

4) Using washerCorrect Answer: Grinding the shank

QID 870 - Which of the following key is under compression rather than

in being shear when underload?1) Saddle

2) Barth

3) Feather

4) KennedyCorrect Answer: Barth

0.7 N/mm. The critical damping coefficient of this system is

.

1) 1.40 Ns/m2) 18.522 Ns/m3) 52.92 Ns/m4) 529.20 Ns/mCorrect Answer: 52.92 Ns/m

QID 868 - Rankine's theory of failure is applicable for which of the

following type ofmaterials?1) Brittle

2) Ductile

3) Elastic

4) PlasticCorrect Answer: Brittle

QID 869 - The shock absorbing capacity of a bolt can be increased by

.1) Tightening it properly

2) Increasing shank diameter

3) Grinding the shank

4) Using washerCorrect Answer: Grinding the shank

QID 870 - Which of the following key is under compression rather than

in being shear when underload?1) Saddle

2) Barth

3) Feather

4) KennedyCorrect Answer: Barth