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Agricultural Engineering MCQs

Q:

Whenever a system undergoes a cyclic change, the algebraic sum of work transfer is proportional to the algebraic sum of heat transfer as work and heat are mutually convertible. Which law of thermodynamics suggests this?

A) Zeroth law of thermodynamics B) Second law of thermodynamics
C) Third law of thermodynamics D) First law of thermodynamics
 
Answer & Explanation Answer: D) First law of thermodynamics

Explanation: For closed system, a change in the energy content is the algebraic difference between the heat supply, Q, and the work done, W, during any change of state. The energy may include many types of energies including kinetic, potential, electrical etc., but from thermodynamic point of view these energies are ignored and the energy due to rise in temperature is considered.

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1113
Q:

A four-stroke diesel engine operating at 1200 rpm uses 0.1 kg of fuel in 5 minutes and develops a torque of 7.5 kg-m. What is the brake specific fuel consumption.

A) 0.2810 kg/BHP/h B) 0.1910 kg/BHP/h
C) 0.1886 kg/BHP/h D) 1.1010 kg/BHP/h
 
Answer & Explanation Answer: B) 0.1910 kg/BHP/h

Explanation: Not available for this question

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551
Q:

The pipe which connects the intake system to the inlet valve of the engine and through which air or air-fuel mixture is drawn into the cylinder is known as _______

A) Spark Plug B) Connecting Rod
C) Camshaft D) Inlet Manifold
 
Answer & Explanation Answer: D) Inlet Manifold

Explanation: Spark plug is a component to initiate the combustion process. Connecting rod connects the piston and the crankshaft and transmits the gas forces from piston to the crankshaft. Camshaft and its associated parts control the opening and closing valves.

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478
Q:

R-enamel is used for high acidic foods.

A) True B) False
 
Answer & Explanation Answer: A) True

Explanation: The given statement is true. R-enamel stands for Regular enamel. It includes – phenolic resin or epoxy phenolic coating (resole phenolic) with BPA epoxy and H?PO? catalyst.

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412
Q:

Find the suction capacity of a power sprayer if diameter is 25 m, speed is 1100 rev/min length of stroke is 22 mm, number of plunger is 3.

A) 35.61 l/min B) 23.90 l/min
C) 56.89 l/min D) 35.47 l/min
 
Answer & Explanation Answer: A) 35.61 l/min

Explanation: Not available for this question

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319
Q:

The width of belt is 15 cm and maximum tension per cm width is not to exceed 12 kg. T?/T?=2.25. Diameter of driver=1m and it makes 220 rpm. Find the horse power that can be transmitted.

A) 11.35 HP B) 10.23 HP
C) 12.12 HP D) 9.86 HP
 
Answer & Explanation Answer: B) 10.23 HP

Explanation: Not available for this question

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310
Q:

________ is characterized by acid attack in glass.

A) Weathering B) Scaling
C) Leaching D) Surface bloom
 
Answer & Explanation Answer: C) Leaching

Explanation: Leaching is characterized by acid attack in which hydrogen ions exchange for alkali or other positively charged mobile ions. The remaining glass (principally silica) usually retains its normal integrity.

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255
Q:

Which one is used as an emulsifying agent in process cheese blend?

A) Paprika B) Pectin
C) Glycerides D) Whey Powder
 
Answer & Explanation Answer: C) Glycerides

Explanation: Emulsifying agents are both fat soluble and water soluble. Emulsifying agents enable fat to be uniformly dispersed in water as an emulsion. Glycerides are emulsifying agents used in butter.

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