4
Tests
4.5
IPreguntas
1
Where should the separator be fitted in relation to any steam flowmeter
a)
As near as possible to the flowmeter
b)
Ten pipe diameters before the flowmeter
c)
Beyond five pipe diameters after the flowmeter
d)
Immediately before the upstream isolation valve and strainer
2
What size of separator should be fitted as part of a DN100 orifice plate flowmeter system? The straight run of pipe each side of the flowmeter is 100 mm diameter. The pipe either side of that has a diameter of 125 mm.
DN125
DN80
DN100
DN150
3
Which of the following is true of a strainer protecting a steam flowmeter?
It should be fitted immediately before the upstream isolating valve so that the valve is protected
It should be fitted with a 1.6 mm mesh screen to minimise the pressure drop across it
It should be fitted with a 100 mesh screen and with the basket pointed down to collect debris
It should be fitted with a 100 mesh screen and with the basket on its side
A factory buys its steam from a power station and is charged for it on the basis of energy used. Credit is given for condensate returned to the power station. The factory wants to be able to check its invoices. How could this be done?
By metering the energy in the steam supply, in the condensate returned and in the flash steam vented from the pump receivers
By metering the energy in the steam supply and deducting this from the calculated heat content of the condensate entering each steam trap
By metering the flowrate in the steam supply and condensate return and converting these figures to energy flow
By metering the energy in the steam supply
5
Which of the following contributes most to the high standard of flowmetering?
Accuracy, PPPPPPPRESIÖN, turndown ratio and installation
Accuracy, repeatability, turndown ratio and installation
Density compensation, when metering water
Turndown ratio, rangeability and constant pressure
6
What personnel are likely to benefit from steam flowmetering
The Managing Director
The Engineering Director
The Finance Director
All of them