# Hydraulic Machines - Part 1 Online Exam Quiz

Hydraulic Machines - Part 1 GK Quiz. Question and Answers related to Hydraulic Machines - Part 1. MCQ (Multiple Choice Questions with answers about Hydraulic Machines - Part 1

### Power required to drive a centrifugal pump is directly proportional to __________ of its impeller.

**Options**

A : diameter

B : square of diameter

C : cube of diameter

D : fourth power of diameter

### The mechanical efficiency of an impulse turbine is

**Options**

A : ratio of the actual power produced by the turbine to the energy actually supplied by the turbine

B : ratio of the actual work available at the turbine to the energy imparted to the wheel

C : ratio of the Work done on the wheel to the energy of the jet

D : none of the above

### The overshot water wheels are those in which the wheel runs entirely by the __________ of water.

**Options**

A : weight

B : impulse

C : -

D : -

### In a Kaplan turbine runner, the number of blades are generally between

**Options**

A : 2 to 4

B : 4 to 8

C : 8 to l6

D : 16 to 24

### If H g is the gross or total head and h f is the head lost due to friction, then net or effective head ( H ) is given by

**Options**

A : H = H g / h f

B : H = H g x h f

C : H = H g + h f

D : H = H g - h f

### Discharge of a centrifugal pump is

**Options**

A : directly proportional to diameter of its impeller

B : inversely proportional to diameter of its impeller

C : directly proportional to (diameter) 2 of its impeller

D : inversely proportional to (diameter) 2 of its impeller

### A Pelton wheel develops 1750 kW under a head of 100 metres while running at 200 r.p.m. and discharging 2500 litres of water per second. The unit power of the wheel is

**Options**

A : 0.25 kW

B : 0.75 kW

C : 1.75 kW

D : 3.75 kW

### The static head of a centrifugal pump is equal to the __________ of suction head and delivery head.

**Options**

A : product

B : difference

C : sum

D : -

### The ratio of actual work available at the turbine to the energy imparted to the wheel is known as __________ efficiency.

**Options**

A : hydraulic

B : mechanical

C : overall

D : -

### Geometric similarity is said to exist between the model and the prototype, if both of them

**Options**

A : have identical velocities

B : are equal in size and shape

C : are identical in shape, but differ only in size

D : have identical forces

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