Questions and answers for exam Preparation

MCQs

Total Questions : 72 | Page 4 of 8 pages

Question 31. Radiation dryers use _____

Ultraviolet rays
Infrared radiation
Visible range
None of the mentioned

Discuss Question

Answer: Option B. -> Infrared radiation
Answer: (b).Infrared radiation

Question 32. If _______ heating has higher heat transfer rates than _______ heating, then why is ________ difficult to be used.

Direct, Indirect, no difficulty, they’re used
Direct, Indirect, coil is difficult to clean and is prone to bacterial growth
Indirect, Direct, no difficulty, they’re used
Indirect, Direct, coil is difficult to clean and is prone to bacterial growth

Discuss Question

Answer: Option B. -> Direct, Indirect, coil is difficult to clean and is prone to bacterial growth
Answer: (b).Direct, Indirect, coil is difficult to clean and is prone to bacterial growth

Question 33. In the below figure, ‘a’ refers to ______ and ‘b’ refers to _____.

Steady state heat transfer, Unsteady state heat transfer
Unsteady state heat transfer, Steady state heat transfer
None of the mentioned
All of the mentioned

Discuss Question

Answer: Option A. -> Steady state heat transfer, Unsteady state heat transfer
Answer: (a).Steady state heat transfer, Unsteady state heat transfer

Question 34. X-axis is temperature and Y-axis is pressure.
Which of the following curves is followed for freeze drying of prawns?

AA’
BB’
ABO
A’OB’

Discuss Question

Answer: Option B. -> BB’
Answer: (b).BB’

Question 35. The x- axis is the moisture content on dry basis. The y-axis is the equilibrium moisture content.
Which of the following shows Bound moisture content?

AIEG
GIBF
GFHC
EGHD

Discuss Question

Answer: Option A. -> AIEG
Answer: (a).AIEG

Question 36. The equation
dq/dA= (k(-dT))/dx is called _____

Kirchhoff’s law of conduction
Fourier’s law conduction
Kirchhoff’s & Fourier’s law conduction
None of the mentioned

Discuss Question

Answer: Option B. -> Fourier’s law conduction
Answer: (b).Fourier’s law conduction

Question 37. Y axis is the density function for volume fraction. X axis is Fₒ.
Curve a represents the microwave heating curve and curve b represents the conventional heating pattern.
Which of the following statements are true for the below graph?

Microwave heating shows a smaller spread hence more uniform heating
Heat transfer in microwave heating is faster than in conventional heating
Heat transfer in microwave heating is safer than in conventional heating
All of the mentioned

Discuss Question

Answer: Option D. -> All of the mentioned
Answer: (d).All of the mentioned

Question 38. Statement 1: Difference between 1-1 and 1-2 heat exchanger is that 1-2 has both counter AND co current, whereas 1-1 has only co-current.
Statement 2: 1-2 heat exchanger requires a high pressure drop.

True, False
True, True
False, False
False, True

Discuss Question

Answer: Option B. -> True, True
Answer: (b).True, True

Question 39. Statement 1: Generally, in small scaled jacketed pans, food products like jams, sauces etc are made.
Statement 2: Baffles provide structural support to tubes, but they cannot prevent channeling.