With respect to the Tyler series, which of the following is true?

Intermediate messes cannot be accommodated in the Tyler series

The ratio of one mess size to the intermediate mesh will have the ratio of 4th root of 2

Intermediate messes cannot be accommodated in the Tyler series

Intermediate meshes can be accommodated in British series only

Which of the following is NOT a reason to affect the effectiveness of a screen?

Insufficient time for food particles to pass through the sieve

Which of the following food operation does NOT use the principle of size reduction for its operation?

Trimming of fish to remove inedible portions

Which of the following is NOT a mixing involved with fluids in the food industry?

Oxygen transfer in fermentation broths

Which of the following is an advantage of size reduction?

Intimate contact with certain food items

Enhanced heat/mass transfer & intimate contact with certain food items

78 + Mcqs in Sedimentation and Centrifuge Techniques in Food Engineering Page 2 McqOptions

51.	Stationary screens can be used for wet particles.
A.	True
B.	False
C.	May be True or False
D.	Can't say
Answer» C. May be True or False

Discussion

52.	Statement 1: Bucket conveyors can be divided into close and spaced bucket conveyors.Statement 2: Bucket conveyors can be divided into centrifugal and positive discharge bucket conveyors.
A.	True, False
B.	True, True
C.	False, False
D.	False, True
Answer» C. False, False

Discussion

53.	With respect to the Tyler series, which of the following is true?
A.	The ratio of one mess size to the intermediate mesh will have the ratio of 4th root of 2
B.	Intermediate messes cannot be accommodated in the Tyler series
C.	Intermediate meshes can be accommodated in British series only
D.	None of the mentioned
Answer» B. Intermediate messes cannot be accommodated in the Tyler series

Discussion

54.	In the specifications of a screw conveyor, the shaft length is shorter than the flight length.
A.	True
B.	False
C.	May be True or False
D.	Can't say
Answer» C. May be True or False

Discussion

55.	Mixing index is applicable for mixing of solids at zero time.
A.	True
B.	False
C.	May be True or False
D.	Can't say
Answer» B. False

Discussion

56.	Which of the following is used for shredding meat in the food industry?
A.	Ball mill
B.	Hammer mill
C.	Knife cutter
D.	All of the mentioned
Answer» D. All of the mentioned

Discussion

57.	Which of the following is NOT a reason to affect the effectiveness of a screen?
A.	Broken mesh wires
B.	Insufficient time for food particles to pass through the sieve
C.	Blocked apertures
D.	None of the mentioned
Answer» E.

Discussion

58.	The clearance between the impeller and the vessel in a mixer is usually kept _____
A.	High
B.	Low
C.	Cannot be determined
D.	None of the mentioned
Answer» C. Cannot be determined

Discussion

59.	A jaw crusher uses _____
A.	Compression
B.	Shear
C.	Cutting
D.	None of the mentioned
Answer» B. Shear

Discussion

60.	The compression zone in batch sedimentation is considered the overflow.
A.	True
B.	False
C.	May be True or False
D.	Can't say
Answer» C. May be True or False

Discussion

61.	Statement 1: For calculating the minimum thickener area, the angle bisector method is used.Statement 2: In the angle bisector method, the point obtained the curve and the corresponding time is the time when the solids enter the compression zone.
A.	True, False
B.	True, True
C.	False, False
D.	False, True
Answer» C. False, False

Discussion

62.	Which of the following food operation does NOT use the principle of size reduction for its operation?
A.	Slaughtering of birds for food
B.	Trimming of fish to remove inedible portions
C.	Mincing of meat
D.	None of the mentioned
Answer» E.

Discussion

63.	Statement 1: Cranes and hoists have an incline up and down option.Statement 2: Trucks can be used for continuous operations.
A.	True, False
B.	True, True
C.	False, False
D.	False, True
Answer» D. False, True

Discussion

64.	Which of the following is NOT a mixing involved with fluids in the food industry?
A.	Soup powders
B.	Carbonated drinks
C.	Oxygen transfer in fermentation broths
D.	None of the mentioned
Answer» B. Carbonated drinks

Discussion

65.	Which of the following is an advantage of size reduction?
A.	Enhanced heat/mass transfer
B.	Intimate contact with certain food items
C.	Enhanced heat/mass transfer & intimate contact with certain food items
D.	None of the mentioned
Answer» D. None of the mentioned

Discussion

66.	Statement 1: Froude number relates the gravitational effect which is important when the liquid is agitated by an impeller.Statement 2: When Nʀₑ,ᵢ < 300, NFr is ineffective.
A.	True, False
B.	True, True
C.	False, False
D.	False, True
Answer» C. False, False

Discussion

67.	Which of the following is NOT a method used for size reduction?
A.	Cutting
B.	Impact
C.	Burning
D.	Shear
Answer» D. Shear

Discussion

68.	Statement 1: Chain drive rollers move faster than belt driven rollers.Statement 2: Screw conveyors are used in the feeding of raw materials like wheat or chilly into the grinding unit to make a powder out of it.
A.	True, False
B.	True, True
C.	False, False
D.	False, True
Answer» C. False, False

Discussion

69.	Mixing Index is a ratio of the standard deviation of various products during mixing to that at zero mixing.
A.	True
B.	False
C.	May be True or False
D.	Can't say
Answer» B. False

Discussion

70.	Statement 1: As mesh size increases, the aperture size decreases.Statement 2: In British standards, the ratio of the aperture size of two consecutive screens is a ratio of 1.412.
A.	True, False
B.	True, True
C.	False, False
D.	False, True
Answer» B. True, True

Discussion

71.	The overall effectiveness of sieve equipment is the _____ of the effectiveness of the underflow and the overflow separately.
A.	Addition
B.	Multiplication
C.	Difference
D.	Division
Answer» C. Difference

Discussion

72.	Statement 1: Belt and screw conveyors are in all processing units to transport the final packed cartons.Statement 2: The feeding in most processing units is done by screw feeders or mechanical/oscillatory feeders.
A.	True, False
B.	True, True
C.	False, False
D.	False, True
Answer» C. False, False

Discussion

73.	Statement 1: It is generally not possible to change the direction of flow with belt conveyors.Statement 2: If belt conveyors are to be used in the bent position, slat belts are used.
A.	True, False
B.	True, True
C.	False, False
D.	False, True
Answer» C. False, False

Discussion

74.	Sedimentation and centrifugation involve two miscible phases.
A.	True
B.	False
C.	May be True or False
D.	Can't say
Answer» C. May be True or False

Discussion

75.	With respect to Sedimentation, the boundary between the thick suspension and solids will be decreasing and that between the clear liquid and the thick suspension will be increasing with the passage of time.
A.	True
B.	False
C.	May be True or False
D.	Can't say
Answer» C. May be True or False

Discussion

76.	In sedimentation, l – clear liquid zone, t- thick suspension zone, s- solid zone. With concentration of solids as the y-axis and the time as the x-axis, which curve does the following represent?
A.	l-t interface
B.	t-s interface
C.	t zone
D.	none of the mentioned
Answer» C. t zone

Discussion

77.	Which of the following does the terminal velocity of a particle NOT depend on?
A.	Density of fluid and particle
B.	Shape of the particle
C.	Viscosity of the fluid
D.	None of the mentioned
Answer» E.

Discussion

78.	In sedimentation, l – clear liquid zone, t- thick suspension zone, s- solid zone. Which of the following curve with height of the interface as the y-axis and the time as the x-axis represent the s-t interface?
A.	a
B.	b
C.	neither a or b
D.	both a and b
Answer» B. b

Discussion

Explore topic-wise MCQs in Food Engineering.

Stationary screens can be used for wet particles.

Statement 1: Bucket conveyors can be divided into close and spaced bucket conveyors.Statement 2: Bucket conveyors can be divided into centrifugal and positive discharge bucket conveyors.

With respect to the Tyler series, which of the following is true?

In the specifications of a screw conveyor, the shaft length is shorter than the flight length.

Mixing index is applicable for mixing of solids at zero time.

Which of the following is used for shredding meat in the food industry?

Which of the following is NOT a reason to affect the effectiveness of a screen?

The clearance between the impeller and the vessel in a mixer is usually kept _____

A jaw crusher uses _____

The compression zone in batch sedimentation is considered the overflow.

Statement 1: For calculating the minimum thickener area, the angle bisector method is used.Statement 2: In the angle bisector method, the point obtained the curve and the corresponding time is the time when the solids enter the compression zone.

Which of the following food operation does NOT use the principle of size reduction for its operation?

Statement 1: Cranes and hoists have an incline up and down option.Statement 2: Trucks can be used for continuous operations.

Which of the following is NOT a mixing involved with fluids in the food industry?

Which of the following is an advantage of size reduction?

Statement 1: Froude number relates the gravitational effect which is important when the liquid is agitated by an impeller.Statement 2: When Nʀₑ,ᵢ < 300, NFr is ineffective.

Which of the following is NOT a method used for size reduction?

Statement 1: Chain drive rollers move faster than belt driven rollers.Statement 2: Screw conveyors are used in the feeding of raw materials like wheat or chilly into the grinding unit to make a powder out of it.

Mixing Index is a ratio of the standard deviation of various products during mixing to that at zero mixing.

Statement 1: As mesh size increases, the aperture size decreases.Statement 2: In British standards, the ratio of the aperture size of two consecutive screens is a ratio of 1.412.

The overall effectiveness of sieve equipment is the _____ of the effectiveness of the underflow and the overflow separately.

Statement 1: Belt and screw conveyors are in all processing units to transport the final packed cartons.Statement 2: The feeding in most processing units is done by screw feeders or mechanical/oscillatory feeders.

Statement 1: It is generally not possible to change the direction of flow with belt conveyors.Statement 2: If belt conveyors are to be used in the bent position, slat belts are used.

Sedimentation and centrifugation involve two miscible phases.

With respect to Sedimentation, the boundary between the thick suspension and solids will be decreasing and that between the clear liquid and the thick suspension will be increasing with the passage of time.

In sedimentation, l – clear liquid zone, t- thick suspension zone, s- solid zone. With concentration of solids as the y-axis and the time as the x-axis, which curve does the following represent?

Which of the following does the terminal velocity of a particle NOT depend on?

In sedimentation, l – clear liquid zone, t- thick suspension zone, s- solid zone. Which of the following curve with height of the interface as the y-axis and the time as the x-axis represent the s-t interface?