Thiss takehome Exam theyve 9 multiple choice questions Thi

** This\'s take-home Exam & they\'ve 9 multiple choice questions. This\'s PTAC 1410-Process Technology I-Equipment 1\'s class (Process Technology). Please, help me to find the answers all of these questions. Thank you so much. **

Q15. A butterfly valve can be used for …………….

(a) Throttling services

(b) On-off services

(c) Cooling tower water services

(d) All of the above

Q23. The heat exchanger that is designed to take the highest flow rates and largest temperature difference is

(a) Floating head, multipass

(b) Doubles pipe

(c) U-tube

(d) Plate and frame

Q25. A typical globe valve directs flow

(a) Under the flow control element

(b) Above the flow control element

(c) Against the side of the flow control element

(d) All of the above depending on design

Q26. Internal slip is defined as

(a) Fluctuation of suction pressure created by the intake stroke

(b) Percent of fluid that leaks by the internal clearance over a given time

(c) Difference between how much liquid a pump can move versus how much it actually does

(d) b and c

Q30. The seats in a gate valve fall into which two categories

(a) Labyrinth and mechanical

(b) Replaceable and fixed

(c) Self-guiding and fixed

(d) Replaceable and moveable

Q41. A cooling tower is classified by how

(a) It produces air flow

(b) The air flows in relation to the downward flow of water, cross, or counter current

(c) The water flows in relation to the downward flow of air, cross or counter

(d) a and b

Q43. The advantages of a centrifugal pumps include all the following except

(a) It delivers a more constant rate

(b) It works well with liquid and gas phases

(c) It is easier to install

(d) It is cheaper

Q44. Carbon deposits are most likely to be found in

(a) Convection section terminal penetration

(b) Convection tube

(c) Radiant tube

(d) Pre-heat tube

Q45. A jet pump is classified as a(n)

(a) Axial pump

(b) Centrifugal pump

(c) Positive displacement pump

(d) Dynamic pump

Solution

Q15: Butterfly valves are used in many mechanical applications as per the usage.Here they are used in all the three services which are given i.e.,in throttle services,on-off services,also for cooling tower equipment in several equipments which produce more heat during the running conditions.

Q23: The heat exchanger thai is designed to take the highest flow rates and largest temperature difference is U-tube.Because in U-tube the flow rate is maximum when compared to the other exchanger and also temperature difference is very high at the turn when the fluid hits the wall there should be a difference in flow rate hence there is a sudden change in temperature occurs instantaneously.

Q25: The typical globe valves directs flow as per the design of the system.This is because the globe valves are of different types as per the requirement such as Angle globe valves containing ports,straight globe valves for the flow to be in straight path or for horizontal piping and also they are in \"Y\" shape as per the design of the flow system.

Q26: Internal slip is defined as the difference between how much liquid a pump can move versus how much it actually does.

Q30: The seats of the gate valves falls in the two catagories replaceable amd moveable.

Q41: The cooling tower is classified as the air flows in relation to the downward flow of water,cross or counter current.

Q43: The centrifugal pumps cannot deal with high viscous fluid.

Q44: The carbon deposits are most likely to be found in convection section terminal penetration.

Q45: A jet pump is classifies as an centrifugal pump for the high speeds and as an axial pump for medium speeds.But mostly used jet pumps are centrifugal due to the high speed working conditions.