Rajasthan Technical Education Second Year Paper 2016 – Industrial Hydraulics

Rajasthan Technical Education Second Year Paper 2016 – Industrial Hydraulics

Viscosity Index (VI) is a relative measure of an oil’s viscosity change with respect to _________change
(a) Temperature
(b) Pressure
(c) Temperature – Pressure
(d) Volume

A __________, which is the heart of a hydraulic system, converts mechanical energy into hydraulic energy .
(a) Pump
(b) Accumulator
(c) Valve
(d) Motor

Needle valve is a
(a) Flow control valve
(b) Direction control valve
(c) Balance valve
(d) None of the above

In pipes, flow velocity of a liquid is
(a) Q/A
(b) Q + A
(c) Q x A
(d) None of the above
Here A= Cross sectional Area
Q = Flow rate (volume)

Hyraulic power is
(a) P X Q X A
(b) P X Q
(c) P/Q
(d) Q/A
Here P = Pressure of the fluid
Q= Flow rate of the fluid
A = Cross sectional area

______________ is used in punch press
(a) Pressure-Intensifier circuit
(b) Pump unloading circuit
(c) High pressure-low flow circuit
(d) None of the above

Relation between Burst Pressure (BP) and working Prssure (WP) is
(a) BP = WP/FS
(b) WP = BP/FS
(c) BP = WP x WP
(d) WP = BP x FS
Here FS = Factor of safety

Generally reservoir size is
(a) 3 x pump flow rate
(b) 2 x pump flow rate
(c) pump flow rate/ 3
(d) pump flow rate/2

How many types of valves used in Hydraulic circuits (Basic types) ?
(a) 2
(b) 3
(c) 4
(d) 5

The temperature at which the oil surface gives off sufficient vapour to ignite, when a flame is passed over the surface, is known as ___________
(a) Fire point
(b) Flash point
(c) Freezing point
(d) None of the above

Used for high flow-low pressure applications
(a) Dynamic pumps
(b) Positive displacement pumps
(c) Lobe pumps
(d) None of the above

Which is NOT a component of a hydraulic circuit ?
(a) Oil
(b) Hydraulic pump
(c) Compressor
(d) Reservoir

The value of viscosity is ________-with the increase in temperature
(a) increases
(b) decreases
(c) does not change
(d) None of the above

If the value of NR is __________2000, the flow is laminar.
(a) less than
(b) more than
(c) equal and more than
(d) None of the above

“ELBOW”is a
(a) pipe
(b) pipe fitting
(c) pump
(d) Motor

Unit of pressure is
(a) bar
(b) rebar
(c) rpm
(d) stoke