Agricultural Engineering Gate 2015 Questions with Answer

Ques 27 GATE 2015

In a plate freezer, the plate temperature is maintained at -25 °C. Latent heat of crystallization is 335 kJ kg⁻¹, and the thermal conductivity and density of frozen meat are 1.25 W m⁻¹ K⁻¹ and 1060 kg m⁻³, respectively. Assuming freezing point of deboned meat at 85% water content on wet basis to be 0 °C, the freezing time in minutes for 2 cm thick block of meat, kept between a pair of freezing plates, is _______.

Ques 28 GATE 2015

The efficiency of a cyclone separator can be increased by

Ques 29 GATE 2015

The correct statement in respect of rice parboiling process is

Ques 30 GATE 2015

In the design of an agitator vessel with model volume V₁ and prototype volume V₂, the scale-up ratio is given by

Ques 31 GATE 2015

The wall of a cold storage is made up of four layers; concrete, brick, cardboard and paint with respective thickness of 5, 60, 8 and 1 mm, and their corresponding thermal conductivities are 0.8, 0.7, 0.04 and 0.15 W m⁻¹ K⁻¹. The overall resistance of the wall to conduction heat transfer in m² K W⁻¹ is

Ques 32 GATE 2015

Two very large parallel walls (gray bodies) facing each other have emissivities of 0.5 and 0.7. The view factor between these two walls is

Ques 33 GATE 2015

In a counter-current flow double pipe heat exchanger (DPHE), temperature difference between the hot and cold liquids at all positions is held constant at C. If the effectiveness of the heat exchanger is 0.65 and heat capacity ratio of hot and cold liquids is 1, the number of transfer units (NTU) is

Ques 34 GATE 2015

The values of C and n for raisin are 1.283×10^{-4} K¹ and 1.02, respectively in the Henderson equation. The equilibrium moisture content of raisin in percent dry basis corresponding to the air with 70% relative humidity at 40 °C is

Ques 35 GATE 2015

A suspension contains 3.6×10⁵ spores of C. botulinum having a D-value of 1.5 minute at 121.1 °C and 8.5×10⁶ spores of B. subtilis having a D-value of 0.9 minute at the same temperature. The suspension is heated at a constant temperature of 121.1 °C. The heating time needed in minutes for the suspension to obtain a survival probability of 10⁻³ for the most heat resistant organism in it is _______.

Ques 36 GATE 2015

Choose the most appropriate word from the options given below to complete the following sentence. The principal presented the chief guest with a __________ as token of appreciation.

Ques 37 GATE 2015

Choose the appropriate word/phrase, out of the four options given below, to complete the following sentence: Frogs ___________.

Ques 38 GATE 2015

Choose the word most similar in meaning to the given word: Educe

Ques 39 GATE 2015

Operators □, ◇ and → are defined by a □ b = a-b/a+b; a ◇ b = a+b/a-b; a → b = ab. Find the value of (6 □ 6) → (6 ◇ 6).