Engineering Questions with Answers - Multiple Choice Questions
Mechanical Operations MCQ’s – Horizontal Belt Filters
1 - Question
____ is the difference between the head race and tail race.
a) Gross head
b) Net head
c) Actual head
d) Initial head
View Answer
Answer: a
Explanation: The difference between the head race level and the tail race level when no water is flowing is known as Gross head, it is denote by Hg.
2 - Question
The head available at the inlet of turbine is called _____
a) Gross head
b) Net head
c) Actual head
d) Initial head
View Answer
Answer: b
Explanation: It is also called as effective head and is defined as the head available at the inlet of turbine, when water is flowing from head race.
3 - Question
_______ is the ratio of water to a power of turbine.
a) Overall efficiency
b) Volumetric efficiency
c) Mechanical efficiency
d) Hydraulic efficiency
View Answer
Answer: d
Explanation: It is defines as the ratio of power given to water to the runner of a turbine to power supplied by water at inlet.
Explanation: It is defines as the ratio of power given to water to the runner of a turbine to power supplied by water at inlet.
4 - Question
The ratio of power available at shaft to that of runner is ____
a) Overall efficiency
b) Volumetric efficiency
c) Mechanical efficiency
d) Hydraulic efficiency
View Answer
Answer: c
Explanation: The ratio of power available at the shaft of the turbine to the power delivered to the runner is defined as the mechanical efficiency.
5 - Question
The ratio of volume of water at runner to that supplied is called ______
a) Overall efficiency
b) Volumetric efficiency
c) Mechanical efficiency
d) Hydraulic efficiency
View Answer
Answer: b
Explanation: Thus the ratio of the volume of water actually striking the runner to the volume of water supplied to the turbine is defined as volumetric efficiency.
6 - Question
_______ is the ratio of volume available at shaft of turbine and at inlet.
a) Overall efficiency
b) Volumetric efficiency
c) Mechanical efficiency
d) Hydraulic efficiency
View Answer
Answer: a
Explanation: It is defined as the ratio of power available at the shaft of the turbine to the power supplied by the water at the inlet of the turbine.
7 - Question
____ is a conduit which connects the runner exit to the tailrace.
a) Baffles
b) Draft tubes
c) Impellor
d) Propeller
View Answer
Answer: a
Explanation: The draft tube is a conduit which connects the runner exit to the tailrace where the water is being finally discharged from the turbine.
8 - Question
______ has the shape of a frustum.
a) Cone Baffles
b) Impellor
c) Conical Draft tubes
d) Cyclone Propeller
View Answer
Answer: c
Explanation: The draft tube has the shape of a frustum of a cone. This is generally provided for low specific speed. The cone angle is not to exceed 80.
9 - Question
Banbury mixer’s operates at a pressure of ____
a) 1 to 10 atm
b) 5 to 20 atm
c) 6 to 18 atm
d) 7 to 50 atm
View Answer
Answer: a
Explanation: Solids are charged from above and held in the trough during the mixing which is air operated at a pressure of 1 to 10 atm.
10 - Question
_____ is rubbing action.
a) Kneading
b) Mixing
c) Mulling
d) Stitching
View Answer
Answer: c
Explanation: Mulling is smearing or rubbing action similar to that in a mortar, this action is given by wide wheels of the mixer i.e. Muller mixer.