Valve Objective Questions, Valves Multiple Choice Questions, Valve MCQ, Valve Interview Questions and answers.
Valves Objective Questions
1. Regardless of type, all valves have the following basic parts, with the exception of _.
a) bonnet
b) nipple
c) actuator
d) body
2. The body of a valve typically receives inlet and outlet piping through any of the following types of joints EXCEPT:.
a) glued
b) welded
c) threaded
d) bolted
3. The internal elements of a valve are collectively referred to as a valve’s .
a) guts b) trim
c) works d) packings
4. The manually operated handwheel, manual lever, motor operator, solenoid operator, pneumatic operator, or hydraulic ram are all examples of
.
a) a yoke
b) a stem
c) a bonnet
d) an actuator
5.Which one of the following valve parts is NOT usually considered to be a part of the pressure boundary.
a) body
b) seal rings
c) bonnet
d) disk
6.The stem in a valve, which connects the actuator and disk, is responsible for positioning the disk.
a) True
b) False
7.Most valves use___________to prevent leakage from the space between the stem and the bonnet.
a) o-rings
b) a liquid seal
c) a metal to metal seal
d) packing
8.Which of the following types of valve uses a flow control element that involves sliding a flat, cylindrical, or spherical surface across an orifice?
a) globe and needle valves
b) butterfly and diaphragm valves
c) gate and plug valves
d) globe and gate valves
9.Which of the following types of valve uses a flow control element that involves moving a flexible material into the flow passage?
a) diaphragm and pinch valves
b) globe and needle valves
c) gate and plug valves
d) needle and pinch valves
10.Which of the following types of valve uses a flow control element that involves moving a disc or plug into or against an orifice?
a) gate and plug valves
b) globe and gate valves
c) globe and needle valves
d) butterfly and diaphragm valves
11.Which of the following types of valve uses a flow control element that involves rotating a disc or ellipse about a shaft extending across the diameter of an orifice?
a) gate and plug valves
b) globe and gate valves
c) glove and needle valves
d) butterfly and ball valves
12.Gate Valves are not recommended for applications which:
a) require regulation and throttling of flow
b) require good sealing with little or no leakage
c) can have no resistance to flow when the valve is open
d) require the use of flanged connections
13.The _____ is the most commonly used disk within a gate valve, because of its simplicity and strength.
a) parallel disk
b) flexible wedge
c) split wedge
d) solid wedge
14.A globe valve is suitable for stopping and starting fluid flow, but not for regulating flow.
a) True
b) False
15.Which of the following is the globe valve body design that is the simplest and most common for water applications?
a. Z-body
b. X-body
c. Angle
d. Y-body
16.Which of the following is the globe valve body design that provides a remedy for the high pressure drop inherent in globe valves?
a) Z-body
b) X-body
c) Angle
d) Y-body
17.Which of the following is the globe valve body design that can be used as both a valve and a piping elbow?
a) Z-body
b) X-body
c) Angle
d) Y-body
18.Which of the following valve types has an actuator that is of the quick-acting type, requiring only a 90 deg turn of the handle to fully open or close the valve?
a) gate valve
b) globe valve
c) ball valve
d) pinch valve
19.Which of the following valve types is well suited for an application where corrosion or metal contamination of the fluid might be a problem, because the operating mechanism is completely isolated from the fluid?
a) pinch valve
b) gate valve
c) butterfly valve
d) reducing valve
20.Which of the following types of valve causes the greatest head loss when completely open?
a) ball valve
b) gate valve
c) butterfly valve
d) globe valve
21.Which of the following is a disadvantage of ball valves?
a) They are large and heavy.
b) They have high maintenance costs.
c) They have relatively poor throttling characteristics
d) They are among the most expensive of the valve types.
22.The gland of a plug valve is equivalent to the ___ of a gate or globe valve.
a) body
b) packing
c) seat
d) bonnet
23.Which type of valve has advantages over other valve designs in weight, space and cost for large valve applications?
a) butterfly valve
b) globe valve
c) diaphragm valves
d) gate valves
24.All of the following are general types of check valves EXCEPT _.
a) butterfly
b) plug
c) swing
d) tilting disc
25.Relief and safety valves prevent equipment damage by relieving accidental over-pressurization of fluid systems.
a) True
b) False
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