Question 16:In a simple bubbler system for open tanks, the bottom of the bubbler standpipe is located at the: C - Zero or datum line in the tank

_______________________________________________

Question 17:
A cylindrical float type liquid level gauge is used in:

A - Open or vented vessels
B - Open or unvented vessels
C - High temperature vessels
D - Closed or vented vessels
_______________________________________________

Question 18:
The distance between the bottom of the tank and the bubble pipe should not be less than 75 mm (2.95 in) in a simple bubble pipe system in order to:

A - Allow the air to come out in a steady stream
B - Provide for blockage of the pipe due to a sediment build-up
C - Allow the air to enter in a steady stream
D - Avoid blockage of the pipe due to a sediment build-up

_______________________________________________

Question 19:
The counterweight of a float and tape level measurement device:

A - Is cylindrical in shape
B - Cannot have it's mass adjusted
C - Acts as a level indicator
D - Is only partly submerged in the liquid
_______________________________________________

Question 20:
The type of float and tape system used for measuring the content in open or vented tanks is the _______________________ system.

A - cylindrical actuated level indicator
B - float actuated level gauge
C - float actuated level indicator
D - cylindrical float type liquid level gauge

Question 1:

This type of material is used to construct valves for water service up to temperatures of about 250°C (482°F):
B - Cast iron
_______________________________________________
Question 2:

The valve designed to protect equipment from reverse-flow damage is the:
B - Check valve
_______________________________________________
Question 3:

When discussing valves, the term "trim" generally refers to the:
D - Valve seat and plug and materials of construction
______________________________________________
Question 4:

A valve having minimum wire drawing and seat erosion is the:
D - Ball valve
_______________________________________________
Question 5:

The type of globe valve well suited for throttling and hard service has a:
C - Plug-type disc
_______________________________________________
Question 6:

A valve that is smaller than the pipe should never be used, because such an arrangement would cause __________________ and____________________.
D - reduced fluid flow, increased friction
_______________________________________________

Question 7:

A valve which contains a dashpot to cushion the action of the valve disc is the:
B - Lift check valve

____________________________________________
Question 8:

A valve which requires specific and routine lubrication is the:
B - Tapered plug valve
_____________________________________________
Question 9:

In selecting a throttling valve for a location where headroom is very limited, the preferred choice would be:
D - A non-rising stem globe valve

____________________________________________
Question 10:

When fixing a small leak by tightening the packing nut or gland, it is always a good idea to tighten the bolted glands more than is necessary to stop the leak in order to prevent future leaks.
B – False

Question 11:

Large butterfly valves usually require some kind of mechanical aid to operate due to the:
D - Large pressure differentials possible

_______________________________________________
Question 12:

This type of material is used to construct valves for water service up to about 300°C (572°F):
C - Brass
______________________________________________
Question 13:

In a gate valve, when the valve is in the closed position:
A - The disc seats against two faces to shut off the flow

_______________________________________________
Question 14:

Valve sizes are selected in accordance with the:
B - Capacity needed and permissible fluid friction losses

_______________________________________________
Question 15:

Wear on stem packing is mainly due to:
B - The rising and turning motion of the valve stem

_______________________________________________

Question 16:

When wire drawing develops on the seat of a valve, the best way to correct it is to:
B - Repair or replace the seat

_______________________________________________
Question 17:

A globe valve may be equipped with a:
A - Composition disc

_______________________________________________

Question 18:
The rising stem gate valve:

Дата добавления: 2015-11-14