Question 1

Which type of boilers use orifice to control the flow circulation?

Accepted Answer

A) natural circulation boilers 
B) forced convection boilers 
C) once-through boilers 
D) positive forced circulation boilers 
A) natural circulation boilers 
B) forced convection boilers 
C) once-through boilers 
D) positive forced circulation boilers B

Question 2

Converging-diverging nozzle is also known as______________

Accepted Answer

A) pascal nozzle 
B) bernouille's nozzle 
C) toricelli's nozzle 
D) de laval' nozzle 
A) pascal nozzle 
B) bernouille's nozzle 
C) toricelli's nozzle 
D) de laval' nozzle D

Question 3

For a compressible, ideal gas, mass flow rate depends on parameters such as flow area, pressure, temperature, properties of the gas, and______________

Accepted Answer

A) avogardo's number 
B) mach number 
C) reynold's number 
D) le-grange' number 
A) avogardo's number 
B) mach number 
C) reynold's number 
D) le-grange' number B

Question 4

To refrain from separation in subsonic nozzles, the expansion angle must not be more than______________

Accepted Answer

A) 10 degrees 
B) 20 degrees 
C) 30 degrees 
D) 40 degrees 
A) 10 degrees 
B) 20 degrees 
C) 30 degrees 
D) 40 degrees

Question 5

A train has to negotiate a curve of radius 400m. By how much should the putter rail be raised with respect to inner rail for speed of 48 km/h? The distance between the rails is 1m.

Accepted Answer

A) 0.20m 
B) 0.0454m 
C) 0.45m 
D) 0.020m 
A) 0.20m 
B) 0.0454m 
C) 0.45m 
D) 0.020m

Question 6

A mass of 4kg rests on a horizontal plane. The plane is gradually inclined until at an angle ?= 15° with the horizontal, the mass just begins to slide. What is the coefficient of static friction between the block and the surface?

Accepted Answer

A) 0.814 
B) 0.27 
C) 1.5 
D) 3.5 
A) 0.814 
B) 0.27 
C) 1.5 
D) 3.5

Question 7

How many level indicators are there in the water level indicator of a boiler?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
A) 1 
B) 2 
C) 3 
D) 4

Question 8

In fluid dynamics, the velocity of the fluid in the stagnation point is

Accepted Answer

A) zero 
B) infinite 
C) non-existent 
D) negative 
A) zero 
B) infinite 
C) non-existent 
D) negative

Question 9

If the speed of sound is much____________than that of the gas, the gas density will stay constant.

Accepted Answer

A) smaller 
B) larger 
C) equal to 
D) non-existent 
A) smaller 
B) larger 
C) equal to 
D) non-existent

Question 10

Which of the following kinetic friction is smaller?

Accepted Answer

A) limiting friction 
B) static friction 
C) rolling friction 
D) sliding friction 
A) limiting friction 
B) static friction 
C) rolling friction 
D) sliding friction

Question 11

What is the function of pressure gauge in the boiler?

Accepted Answer

A) to indicate steam pressure 
B) to indicate water pressure 
C) to indicate air pressure 
D) to indicate flue gas pressure 
A) to indicate steam pressure 
B) to indicate water pressure 
C) to indicate air pressure 
D) to indicate flue gas pressure

Question 12

Which are the major types of boilers that are operated in world today?

Accepted Answer

A) natural circulation boiler 
B) forced circulation boiler 
C) fire tube boiler 
D) once through boiler 
A) natural circulation boiler 
B) forced circulation boiler 
C) fire tube boiler 
D) once through boiler

Question 13

What is the function of fusible plug in the boiler?

Accepted Answer

A) protect the fire tube 
B) to trip on overload 
C) to act as a junction switch 
D) to maintain pressure 
A) protect the fire tube 
B) to trip on overload 
C) to act as a junction switch 
D) to maintain pressure

Question 14

When moving along a curved path, he

Accepted Answer

A) leans inwards 
B) leans outwards 
C) is still 
D) leans sideways 
A) leans inwards 
B) leans outwards 
C) is still 
D) leans sideways

Question 15

A scooter weighs 120kg f. Brakes are applied so that wheels stop rolling and start skidding. Find the force of friction if the coefficient of friction is 0.4.

Accepted Answer

A) 60kg f 
B) 48kg f 
C) 25kg f 
D) 32kg f 
A) 60kg f 
B) 48kg f 
C) 25kg f 
D) 32kg f

Question 16

What is the function of Blow down valve of a boiler?

Accepted Answer

A) to remove sludge 
B) to build sediments 
C) to remove flue gas 
D) to remove ash 
A) to remove sludge 
B) to build sediments 
C) to remove flue gas 
D) to remove ash

Question 17

What is the advantage of having smaller ratio of water to steam space?

Accepted Answer

A) steam can be generated at a faster even if the boiler is cold 
B) increases the rate of evaporation 
C) water is made cyclic, i.e., from boiler drum to water tube and back to drum 
D) helps in mobilizing the boiler 
A) steam can be generated at a faster even if the boiler is cold 
B) increases the rate of evaporation 
C) water is made cyclic, i.e., from boiler drum to water tube and back to drum 
D) helps in mobilizing the boiler

Question 18

Isentropic nozzle flow states about the movement of a gas or fluid through a narrow orifice without an increase or decrease in

Accepted Answer

A) accelerating 
B) decelerating 
C) equilibrium 
D) exponential increase 
A) accelerating 
B) decelerating 
C) equilibrium 
D) exponential increase

Question 19

When the pressure chamber is big, the flow velocities are______________

Accepted Answer

A) large 
B) negligible 
C) constant 
D) increasing 
A) large 
B) negligible 
C) constant 
D) increasing

Question 20

How is friction due to air reduced?

Accepted Answer

A) streamlining 
B) lubrication 
C) by using ball bearings 
D) by polishing 
A) streamlining 
B) lubrication 
C) by using ball bearings 
D) by polishing

Which type of boilers use orifice to control the flow circulation?

Converging-diverging nozzle is also known as______________

For a compressible, ideal gas, mass flow rate depends on parameters such as flow area, pressure, temperature, properties of the gas, and______________

To refrain from separation in subsonic nozzles, the expansion angle must not be more than______________

A train has to negotiate a curve of radius 400m. By how much should the putter rail be raised with respect to inner rail for speed of 48 km/h? The distance between the rails is 1m.

A mass of 4kg rests on a horizontal plane. The plane is gradually inclined until at an angle ?= 15° with the horizontal, the mass just begins to slide. What is the coefficient of static friction between the block and the surface?

How many level indicators are there in the water level indicator of a boiler?

In fluid dynamics, the velocity of the fluid in the stagnation point is

If the speed of sound is much____________than that of the gas, the gas density will stay constant.

Which of the following kinetic friction is smaller?

What is the function of pressure gauge in the boiler?

Which are the major types of boilers that are operated in world today?

What is the function of fusible plug in the boiler?

When moving along a curved path, he

A scooter weighs 120kg f. Brakes are applied so that wheels stop rolling and start skidding. Find the force of friction if the coefficient of friction is 0.4.

What is the function of Blow down valve of a boiler?

What is the advantage of having smaller ratio of water to steam space?

Isentropic nozzle flow states about the movement of a gas or fluid through a narrow orifice without an increase or decrease in

When the pressure chamber is big, the flow velocities are______________

How is friction due to air reduced?

Nozzles, Fountains, and Compressible Flow

Boiler and Fuel

Turbines, Heat Exchangers, and Refrigeration Cycles

Refrigeration and Air Conditioning System Components and Processes

Cooling Systems and Nozzles in Engineering

Understanding Fluid Mechanics and Turbines

Boiler Types and Operations

Boiler Technology and Operation: Salts, Features, Difficulties, and Draught Systems

Steam Boilers and Turbines: Types, Characteristics, and Applications

Understanding Steam Turbines: Ratios, Actions, and Factors

Steam Turbines and Power Cycles

Energy Recovery and Thermodynamics Processes

Condensers and Heat Transfer in Refrigeration and Air Conditioning Systems

Boiler Systems and Fluid Dynamics

Turbines, Cogeneration, Refrigeration, and Air Conditioning Systems

Filters

Exam 2: Friction, Mach Number, and Boiler Operations

Which type of boilers use orifice to control the flow circulation?

Converging-diverging nozzle is also known as______________

For a compressible, ideal gas, mass flow rate depends on parameters such as flow area, pressure, temperature, properties of the gas, and______________

To refrain from separation in subsonic nozzles, the expansion angle must not be more than______________

A train has to negotiate a curve of radius 400m. By how much should the putter rail be raised with respect to inner rail for speed of 48 km/h? The distance between the rails is 1m.

A mass of 4kg rests on a horizontal plane. The plane is gradually inclined until at an angle ?= 15° with the horizontal, the mass just begins to slide. What is the coefficient of static friction between the block and the surface?

How many level indicators are there in the water level indicator of a boiler?

In fluid dynamics, the velocity of the fluid in the stagnation point is

If the speed of sound is much____________than that of the gas, the gas density will stay constant.

Which of the following kinetic friction is smaller?

What is the function of pressure gauge in the boiler?

Which are the major types of boilers that are operated in world today?

What is the function of fusible plug in the boiler?

When moving along a curved path, he

A scooter weighs 120kg f. Brakes are applied so that wheels stop rolling and start skidding. Find the force of friction if the coefficient of friction is 0.4.

What is the function of Blow down valve of a boiler?

What is the advantage of having smaller ratio of water to steam space?

Isentropic nozzle flow states about the movement of a gas or fluid through a narrow orifice without an increase or decrease in

When the pressure chamber is big, the flow velocities are______________

How is friction due to air reduced?

Nozzles, Fountains, and Compressible Flow

Boiler and Fuel

Turbines, Heat Exchangers, and Refrigeration Cycles

Refrigeration and Air Conditioning System Components and Processes

Cooling Systems and Nozzles in Engineering

Understanding Fluid Mechanics and Turbines

Boiler Types and Operations

Boiler Technology and Operation: Salts, Features, Difficulties, and Draught Systems

Steam Boilers and Turbines: Types, Characteristics, and Applications

Understanding Steam Turbines: Ratios, Actions, and Factors

Steam Turbines and Power Cycles

Energy Recovery and Thermodynamics Processes

Condensers and Heat Transfer in Refrigeration and Air Conditioning Systems

Boiler Systems and Fluid Dynamics

Turbines, Cogeneration, Refrigeration, and Air Conditioning Systems

Filters