RSMSSB JE Mechanical Degree Level 2016 Paper
A real fluid is any fluid which
(a) has zero shear stress
(b) has viscosity
(c) has constant viscosity and density
(d) has surface tension and is in compressible
Inclined single column Manometer is useful for the measurement of _____________pressures
(a) Negative
(b) Small
(c) Medium
(d) High
High velocity in a conduct of large size is known as
(a) Laminar flow
(b) Turbulent flow
(c) Eighter of above
(d) None of the above
For fiscous flow the co-efficient of friction is given by
(a) f=8/Re
(b) f=16/Re
(c) f=32/Re
(d) f=64/Re
Minor losses in a pipe flow are those losses
(a) Which are insignificantly small
(b) Which can be neglected always
(c) Caused by frictional resistance
(d) Caused by local disturbance due to pipe fitting
A tapered draft tube as compared to a cylinderical draft tube
(a) Prevents cavitation even under reduce discharge
(b) Prevents hammer blow
(c) Responds better to load fluctuations
(d) Converts more of kinetic head into pressure head
Maximum impulse will be developed in hydraulic ram when
(a) Ram chamber is large
(b) Supply pipe is long
(c) Supply pipe is short
(d) Waste valve closes suddenly
In a hydraulic cooupling
(a) Slip is around 2 to 3 percent at the running speed
(b) Slip is negligible at low speeds
(c) Efficiency of transmission is high at low speeds
(d) Efficiency is high as compared to mechanical coupling
A hydraulic intersifier normally consists of
(a) a cylinder and a ram
(b) a cylinder, a piston, storage tank and control valve
(c) two cylinders, two rams and a storage device
(d) two co-axial rams and two cylinders
Which of the following devices is used for transmitting increased or decreased torque from one shaft to another
(a) Hydraulic torque converter
(b) Hydraulic ram
(c) Hydraulic intensifier
(d) Hydraulic coupling
The power which appears in the expression for the specific speed is the
(a) Water power
(b) Shaft power
(c) Power into the turbine
(d) None of the above
Specific speed of an palton wheen ranges from
(a) 12 to 70
(b) 80 to 400
(c) 300 to 1000
(d) 1000 to 1200
In a Francis turbine the discharge leaves the runner radially at exit for this turbine
(a) The blade tip is radial at the outlet
(b) The blade tip is radial at the inlet
(c) The guide vane angle is 90 degree
(d) The absolute velocity is radial at outlet
Which of the following turbines is most efficient at part load operation ?
(a) Propeller
(b) Palton wheel
(c) Francis
(d) Kaplan
A Palton turbine is considered suitable for which of the following head
(a) 10 to 20 m
(b) 20 to 30 m
(c) 35 to 50 m
(d) 100 to 250 m
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