List of practice Questions

Identify the correct pair(s) of milling equipment and the grain for which it is used.

Which among the following expression(s) is/are correct?

In a dairy processing plant, milk enters a 30 m long and 2 cm diameter tube at 60 °C and leaves at 57 °C. The total heat loss over the tube length is 381.15 W. The specific heat capacity, density, and viscosity of milk are 3.85 kJ kg\(^{-1}\) K\(^{-1}\), 1020 kg m\(^{-3}\), and 1.20 cP, respectively. The Reynolds number for the flow is ________ (round off to the nearest integer).

The dry bulb temperature and relative humidity of air inside a storage chamber are 37 °C and 50%, respectively. The saturation pressure of water vapour at 37 °C and barometric pressure are 6.28 kPa and 101.32 kPa, respectively. The humidity ratio of air inside the chamber is ________ kg water (kg dry air)⁻¹ (round off to three decimal places).
Given: Molecular weight of water vapour and dry air are 18.02 g mol⁻¹ and 28.97 g mol⁻¹, respectively.

The input \( x(t) \) to a system is related to its output \( y(t) \) as
\[ \frac{d y(t)}{dt} + y(t) = 3x(t - 3)u(t - 3) \] \text{Here \( u(t) \) represents a unit-step function.}
\text{The transfer function of this system is _________}

A pneumatic nozzle-flapper system is conventionally used to convert _________

Make the correct pair of food packaging technology given in Column I with operating principle or description in Column II.

Which of the following is not a caramel flavour producing compound?

Match the size reduction equipment in Column I with the method of operation in Column II.

Most commonly used refrigerant in direct immersion freezing of food is

Which among the following are \(\omega\)-6 polyunsaturated essential fatty acids?

Which among the following statements are true with respect to protein denaturation?

Homogenization of milk leads to disintegration of fat globules by

The lowest water activity (\(a_w\)) supporting the growth of Staphylococcus aureus in food under aerobic condition is

Cultures used in industrial production of yogurt are

In a dairy plant, spray drying technology is used to produce whey powder. The rate of spray drying depends on

The parboiling of paddy results into

One hundred kg paddy is dried from 18% wet basis to 13% wet basis moisture content. The amount of water removed (in kg) from the paddy is ________ (round off to one decimal place).

In a canning industry, the total process time (F0) was calculated as 3 min. If each can contains 20 spores having decimal reduction time of 1.6 min, the probability of spoilage would be ________ in 100 cans (round off to the nearest integer).

Match the edible oil refining stages given in Column I with their respective functions in Column II.

2-Deoxyglucose (2-DG) inhibits the proliferation of cells and hence finds use as an anti-cancer agent. It is also used in COVID therapy, where it blocks hyperproliferation of virus-infected cells. Mechanistically, 2-DG blocks glycolysis by inhibiting the activities of which of the following enzyme/s?

According to Abbe’s equation on microscopy, the ability to resolve two entities inside a cell by light microscopy depends on which of the following factor/s?

Match the animal inactivity behaviors listed in Column I with representative animals in Column II and their definitions listed in Column III.

Column III
(a) Prolonged period of inactivity without reducing body temperature
(b) Inactivity period which accompanies extended periods of dryness
(c) Decreased metabolism with lowered body temperature occurring in daily activity cycles
(d) Decreased metabolism and lower body temperature for weeks or months

If the vital capacity (VC) of an individual is 4900 ml, the tidal volume (TV) is 500 ml, and the inspiratory reserve volume (IRV) is 3300 ml, the expiratory reserve volume (ERV) of the individual is ________ ml (in integer).