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BARC OCES 2022 Quiz 14

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Question 1

In a centrifugal pump casing, the flow of water leaving the impeller is

Question 2

The centrifugal pump should be installed above the water level in the sum such that

Question 3

The power of the pump is given as 30 hp. What is the equivalent power expressed in watts?

Question 4

Identify the false statement from the following.
The specific speed of the pump increases with ______.

Question 5

The head developed by the centrifugal pump is 40 m while operating at the speed of 750 rpm. If the rated capacity is given as 50 cumec, what is the specific speed of centrifugal pump?

Question 6

According to Khosla’s theory, the exit gradient in the absence of a downstream cutoff is:-

Question 7

Which of the following is true in case of railway track maintenance?

Question 8

A tower of height 200m is photographed using a camera of focal length 2.5cm from an altitude of 1250m. The relief displacement is 8 mm and the distance of the top of the tower from the principal point on the photograph is 12 mm.

It is observed that the aircraft is directly flying in the direction of the tower. If the speed of the aircraft is 180kmph, how long will it take for the aircraft to pass directly over the tower?

Question 9

A 20 cm centrifugal pump delivers 13.2 Ips at a head of 45 m when running at a speed of 1350 r.p.m. A similarly designed pump of 15 cm size runs at the same speed. What are the most likely values of discharge and delivery head serviced by this second pump?

Question 10

One liter of sewage, when allowed to settle for 30 minutes gives a sludge volume of 27 cm3. If the dry weight of this sludge is 3.0 grams, then its sludge volume index will be
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Oct 13ESE & GATE CE