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ESE Prelims 2022 Achievers Quiz 16

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Question 1

A double acting reciprocating pump having piston area 0.1m² has a stroke length 0.30m. The pump is discharging 2.4m³ of water per minute at 45 r.p.m. through a height of 10m. What is the slip of the pump ?

Question 2

A centrifugal pump delivers water against a net head of 14.5 m and a design speed of 1000 r.p.m. The vanes are curved back to an angle of 30° with the periphery. The impeller diameter is 300 mm and the outlet width is 50 mm. What is the tangential velocity of impeller at outlet?

Question 3

Water is to be pumped out of a deep well under a total head of 95 m. A number of identical pumps of design speed 1000 rpm and specific speed 900 rpm with a rated capacity of 150 l/s are available. The number of pumps required will be

Question 4

A double-acting reciprocating pump having a piston area of 0.1m² has a stroke 0.30 m long. The pump is discharging 2.4m² of water per minute at 45 rpm through a height of 10m. The slip of the pump and power required to drive the pump will be nearly.

Question 5

A 15 cm centrifugal pump delivers 6 lps at a head of 26 m running at a speed of 1350 rpm. A similarly designed pump of 20 cm size runs at the same speed. What are the most likely nearest magnitudes of discharge and delivery head provided by the latter pump?

Question 6

If the load, warping and frictional stresses in a cement concrete slab are 210 N/mm², 290 N/mm² and 10 N/mm² respectively, the critical combination of stresses during winter mid-day is

Question 7

Read the following statements carefully
Statement I: The most widely used test for design of rigid pavements is the California Bearing Ratio (CBR) test.
Statement II: CBR test can be used for evaluating soil strength properties such as cohesion and internal friction.
Choose the correct option

Question 8

For a 25cm thick cement concrete pavement, analysis of stresses gives the following values
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The most critical stress value for this pavement is

Question 9

Consider the following statements in the context of cement concrete pavements.
I: Warping stresses in cement concrete pavements are caused by the seasonal variation in temperature
II: Tie bars are generally provided across transverse joints of cement concrete pavements
The correct option evaluating the above statement is

Question 10

In a pavement slab of thickness 18 cm the modulus of elasticity of concrete and Poisson's ratio are 3 x 10⁵ kg/cm² and 0.15 respectively. Plate bearing test shown the pressure of 1.2 kg/cm² corresponding to 1.25 mm penetration. What is the radius (in cm) of relative stiffness of pavement slab?

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ESE & GATE CE General

Feb 2ESE & GATE CE