Debayan , Manas FSC ( 30th Jan )

1.

For a ductile material, toughness is a measure of

A.

Ability to absorb energy till elastic limit
B.

Resistance to scratching
C.

Ability to absorb energy upto fracture
D.

Resistance to indentation

Correct Answer
C. Ability to absorb energy upto fracture

Explanation
Toughness is a measure of a material's ability to absorb energy before it fractures. Ductile materials have the ability to undergo plastic deformation before breaking, which allows them to absorb more energy. Therefore, toughness is a particularly important property for ductile materials as it indicates their ability to withstand impact and absorb energy until they reach their fracture point.

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2.

A = magnitude of penalty applied when the downforce of the car changes from 200N to 220N in Autocross in sec. B = magnitude of penalty applied if the car weight changes by 3.2kg more than the allowed change. What is A*B?

A.

200
B.

300
C.

400
D.

None of the above

Correct Answer
C. 400

3.

Which is wrong about HPI:

A.

The fuel rails can be made of stainless steel.
B.

The fuel rail must be securely attached with the engine with the help of mechanical fasteners
C.

The fuel can be mounted on any side of the engine
D.

A pressure regulator must be used to maintain the pressure between low pressure and high pressure side of the engine.

Correct Answer
C. The fuel can be mounted on any side of the engine

Explanation
The statement "the fuel can be mounted on any side of the engine" is incorrect. The fuel rail cannot be mounted on any side of the engine. It needs to be positioned in a specific location to ensure proper fuel delivery to the engine.

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4.

Which of the following is incorrect ?

A.

A throttle cable located at 40mm from the exhaust pipe is allowed
B.

The intake runner system between the throttle body and the restrictor can be a square measuring 53 X 53mm
C.

Fuel tank containers carrying a bladder type fuel cell can be load carrying
D.

The fuel tank filler neck can have a venturi of 34mm diameter

Correct Answer
D. The fuel tank filler neck can have a venturi of 34mm diameter

Explanation
The fuel tank filler neck cannot have a venturi of 34mm diameter.

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5.

If the voltage of the potential barrier is V₀. A voltage V is applied to the input, at what moment will the barrier disappear?

A.

V= V₀
B.

V< V₀
C.

V> V₀
D.

V<< V₀

Correct Answer
A. V= V₀

Explanation
When the voltage applied to the input is equal to the voltage of the potential barrier (V = V0), the barrier will disappear. This is because when the applied voltage matches the potential barrier voltage, the energy required to overcome the barrier is equal to the energy provided by the applied voltage. As a result, the barrier is no longer able to prevent the flow of current and effectively disappears.

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6.

What is the configuration for the intake system restrictor in a turbocharged engine.

A.

Restrictor, compressor, pop off valve, throttle body, engine
B.

Compressor, restrictor, pop off valve , throttle body, engine
C.

Compressor, pop off valve, restrictor, throttle body, engine
D.

compressor, pop off valve, throttle body, restrictor , engine

Correct Answer
A. Restrictor, compressor, pop off valve, throttle body, engine

7.

A team uses Aeroquip FC807 PTFE hose for their high-pressure fuel lines with visible IFR tracer yarn and stainless steel reinforcements. It is rigidly connected every 100mm by mechanical fasteners to the structural engine components. The fuel line fails the technical inspection due to

A.

PTFE fuel lines cannot be used
B.

Wrong type of PTFE hose used
C.

Wrong type of Tracer Yarn used
D.

It should be rigidly connected every 50mm

Correct Answer
A. PTFE fuel lines cannot be used

8.

The engine lubrication system of your vehicle has a capacity of 12.5l. In the driving condition, it is 80% filled with the fluid. What is the minimum volume of catch can?

A.

0.9L
B.

1L
C.

1.1L
D.

1.2L

Correct Answer
B. 1L

Explanation
The engine lubrication system has a capacity of 12.5L, and it is currently 80% filled with fluid. To determine the minimum volume of the catch can, we need to calculate 80% of 12.5L.

80% of 12.5L is equal to (80/100) * 12.5L = 10L.

Therefore, the minimum volume of the catch can should be at least 10L to accommodate the fluid in the engine lubrication system.

Among the given options, 1L is the closest to the minimum required volume of 10L.

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9.

A wardrobe (mass=100 kg, height 4m, width 2m, depth 1m), symmetric about the Y-Y axis, stands on a rough level floor as shown in the figure. A force P is applied at the mid- height on the wardrobe so as to tip it about point Q without slipping. What are the minimum values of the force (in Newton) and the static coefficient u between the floor and the wardrobe, respectively?

A.

490.5 and 0.5
B.

981 and 0.5
C.

1000.5 and 0.15
D.

1000.5 and 0.25

Correct Answer
A. 490.5 and 0.5

Explanation
The minimum value of the force required to tip the wardrobe about point Q without slipping can be found by considering the torque acting on the wardrobe. The torque is equal to the force multiplied by the perpendicular distance from the line of action of the force to point Q. Since the wardrobe is symmetric about the Y-Y axis, the line of action of the force passes through point Q, and the perpendicular distance is half the height of the wardrobe. By setting the torque equal to zero, we can solve for the force. The static coefficient u between the floor and the wardrobe does not affect the torque calculation. Therefore, the minimum force required is 490.5 Newtons, and the static coefficient u is 0.5.

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10.

While the loss and delay of messages by cables or wires when checked by transmission time outs may result in a safe state of all connected systems. Number of rules violated

A.

1
B.

2
C.

3
D.

0

Correct Answer
A. 1

Explanation
The given statement suggests that when messages are lost or delayed due to transmission time outs, it may lead to a safe state of all connected systems. The correct answer, "1," implies that only one rule is violated in this scenario.

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Debayan , Manas FSC ( 30th Jan )

For a ductile material, toughness is a measure of

A = magnitude of penalty applied when the downforce of the car changes from 200N to 220N in Autocross in sec. B = magnitude of penalty applied if the car weight changes by 3.2kg more than the allowed change. What is A*B?

Which is wrong about HPI:

Which of the following is incorrect ?

If the voltage of the potential barrier is V0. A voltage V is applied to the input, at what moment will the barrier disappear?

What is the configuration for the intake system restrictor in a turbocharged engine.

A team uses Aeroquip FC807 PTFE hose for their high-pressure fuel lines with visible IFR tracer yarn and stainless steel reinforcements. It is rigidly connected every 100mm by mechanical fasteners to the structural engine components. The fuel line fails the technical inspection due to

The engine lubrication system of your vehicle has a capacity of 12.5l. In the driving condition, it is 80% filled with the fluid. What is the minimum volume of catch can?

While the loss and delay of messages by cables or wires when checked by transmission time outs may result in a safe state of all connected systems. Number of rules violated

If the voltage of the potential barrier is V₀. A voltage V is applied to the input, at what moment will the barrier disappear?