Name: Rustam, Begyssov

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Name: Rustam, Begyssov

Task: PUMP 6014_Pumps, Seals and bearings

Score: 0.00 %

Passed: No

Time Limit: None

Time Spent: 00:00:00

Total Questions: 10

Correct: 0

Incorrect: 10
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Question 1:

What should a pump that operates with negative suction pressure be equipped with to prevent air being drawn into the casing?

A - shaft sleeves and sleeve adjustment nuts
B - stuffing boxes and auto-lubricators
C - packing rings and a pump shaft
D - lantern rings and sealing water connections

Correctness Rule: Single Correct Answer Required

Answer(s) Given:
Correct Answer(s): D
Marked as: Incorrect

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Question 2:

A mechanical seal, known as a "pusher" type:

A - Has a single spring coil fits over the shaft and bellows
B - Does not use a dynamic secondary seal or o-ring
C - Uses a bellows to provide the necessary spring loading for seal face contact
D - Uses a dynamic secondary seal or o-ring that seals the fluid path

Correctness Rule: Single Correct Answer Required

Answer(s) Given:
Correct Answer(s): D
Marked as: Incorrect

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Question 3:

Mechanical seals:

A - Cannot be designed to work under very high temperatures and pressures
B - Reduce leakage to a minimum
C - Cause wear on shafts or shaft sleeves
D - Require more maintenance than packing rings

Correctness Rule: Single Correct Answer Required

Answer(s) Given:
Correct Answer(s): B
Marked as: Incorrect

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Question 4:

The mechanical seal configuration where the sliding faces of two spring backed seals run against a common stationary seat is called:

A - Back to back
B - Face to face
C - Tandem
D - Concentric

Correctness Rule: Single Correct Answer Required

Answer(s) Given:
Correct Answer(s): B
Marked as: Incorrect

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Question 5:

Packing in the stuffing box of a pump:

A - Will not wear the pump shaft
B - Requires no lubrication
C - Should stop leakage entirely
D - Should not stop leakage entirely

Correctness Rule: Single Correct Answer Required

Answer(s) Given:
Correct Answer(s): D
Marked as: Incorrect

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Question 6:

In a rotating mechanical seal:

A - A shell secured to the shaft by setscrews holds the mating ring so that it turns with the shaft
B - There is no need for O-rings because the mating surfaces provide the seal
C - A raised shoulder on the shaft accommodates the mating ring
D - A shell secured to the shaft by setscrews holds the sealing ring so that it turns with the shaft

Correctness Rule: Single Correct Answer Required

Answer(s) Given:
Correct Answer(s): D
Marked as: Incorrect

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Question 7:

A lantern ring is normally installed on a pump when the:

A - Pump must handle fluids containing abrasive solids
B - Fluid being handled is gasoline, acid, or ammonia
C - Fluid is clean, but the suction pressure is always positive
D - Mechanical seal is stationary and requires a cooling water supply

Correctness Rule: Single Correct Answer Required

Answer(s) Given:
Correct Answer(s): A
Marked as: Incorrect

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Question 8:

The term "dynamic pump seal" means that:

A - Slight leakage must be allowed to confirm that the seal is functioning correctly
B - The shaft and seal must be able to turn together
C - It must be possible to tighten any seal leaks without shutting the pump down
D - The shaft must be able to move freely while the seal prevents fluid loss

Correctness Rule: Single Correct Answer Required

Answer(s) Given:
Correct Answer(s): D
Marked as: Incorrect

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Question 9:

The mating ring of a mechanical seal:

A - Holds the stuffing box packing in place
B - Is held in position by a spring
C - Is positioned so that it has no contact with the sealing ring
D - Is positioned with its face in contact with that of the sealing ring

Correctness Rule: Single Correct Answer Required

Answer(s) Given:
Correct Answer(s): D
Marked as: Incorrect

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Question 10:

The type of bearing used in pumps in the illustration is called a:

A - Tapered roller bearing
B - Spherical roller bearing
C - Needle roller bearing
D - Cylinder roller bearing

Correctness Rule: Single Correct Answer Required

Answer(s) Given:
Correct Answer(s): A
Marked as: Incorrect

Assessment Summary (Final Assessment)

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Name: Rustam, Begyssov

Дата добавления: 2015-10-30