1.
A team is undergoing an endurance event. Which of the given statements is true?
Statement 1 - when the track is changing from "dry" to "wet" and the team changes tires there is no time added to the final time
Statement 2 - The marshalls show a black flag to the driver and the driver gets reprimanded for inappropriate driving
Statement 3 - Team is disqualified if brake light is not functioning properly
Correct Answer
A. Statement 1, Statement 2, Statement 3
2.
Your team completes an endurance run with a time of 23 minutes and 10 seconds. The fastest time put up by any team is 17 minutes and 2 seconds. If your team has hit 2 cones during the run. Which of the following is true?
Correct Answer
D. None of the above
3.
A team has installed a fuel filler neck and its angled at angle X degrees from the vertical, the clear sight tube is installed parallel to the filler neck. Which of the following are true
Correct Answer
D. Length of 141.57mm
Explanation
The length of 141.57mm is the correct answer because it is the length of the fuel filler neck. Since the clear sight tube is installed parallel to the filler neck, its length will also be the same as the filler neck. Therefore, the length of 141.57mm is true. The other options are incorrect because they do not match the length of the fuel filler neck.
4.
During the acceleration event, the nose of a car scrapes with the tarmac and has visible holes on the lower side of the nose, the team does not repair it, what can happen?
Your team is participating in the acceleration event, the bottom of the nose bumps with the track. Due to this, there are holes at the bottom of the nose. If the team cannot repair it at the pits, which of the following is true>=?
Correct Answer
C. TI will have to resubmitted
Explanation
If the team is unable to repair the visible holes on the lower side of the nose during the acceleration event, the answer suggests that the Technical Inspection (TI) will have to be resubmitted. This implies that the car may not meet the safety or performance standards required for the event, and therefore needs to undergo further inspection and repairs before being allowed to participate again.
5.
Which of the following cases would the power to the ETC not be shut down?
Correct Answer
D. None of the above
Explanation
The power to the ETC would not be shut down in any of the given cases. This means that none of the conditions mentioned in the options would trigger a shutdown of power to the ETC.
6.
Which of the following can lead to the team incurring a penalty?
Correct Answer
B. Attaching Drivers vest to the vehicle while driver is not seated in the car
Explanation
Attaching the driver's vest to the vehicle while the driver is not seated in the car can lead to the team incurring a penalty. This is because it violates safety regulations and can potentially cause accidents or injuries if the vest gets stuck or tangled while the car is in motion.
7.
The throttle actuating system of my car uses X return springs (including the torsional spring). Which of the following is true
Correct Answer
D. X = 2
Explanation
The correct answer is X = 2. This means that the throttle actuating system of the car uses two return springs, including the torsional spring.
8.
A cylinder of radius R is surrounded by a cylindrical shell of inner radius R and outer radius 2R. The thermal conductivity of the material of the inner cylinder K1 is and that of the outer cylinder K2 is . Assuming no loss of heat, the effective thermal conductivity of the system for heat flowing along the length of the cylinder is :
Correct Answer
D. (k1+3k2)/4
Explanation
The effective thermal conductivity of the system can be calculated by taking the weighted average of the thermal conductivities of the inner and outer cylinders, where the weights are determined by the areas of the respective cylinders. Since the inner cylinder has a radius R and the outer cylinder has a radius 2R, the area ratio between the two cylinders is (2R)^2/R^2 = 4. Therefore, the weight of the inner cylinder is 1 and the weight of the outer cylinder is 4. Taking the weighted average of the thermal conductivities, we get (1*K1 + 4*K2)/5 = (K1 + 4K2)/5. Simplifying further, we get (K1 + 4K2)/5 = (K1 + 3K2)/4, which matches the given answer choice of (k1+3k2)/4.
9.
Two light identical springs of spring constant k are attached horizontally at the two ends of a uniform horizontal rod AB of length l and mass m. The rod is pivoted at its centre 'O' and can rotate freely in horizontal plane. The other ends of the two springs are fixed to rigid supports as shown in figure. The rod is gently pushed through a small angle and released. The frequency of resulting oscillation is :
P = 1/2pi
Correct Answer
D. None of the above
10.
Two electric bulbs, rated at (30W,220V) and (120W,22V) are connected in series across a 240V voltage source. If the 30W and 120W bulbs draw powers P1 and P2 respectively, then which of the following is false
Correct Answer
A. P1<P2
Explanation
When two bulbs are connected in series, the total voltage across them is divided between the bulbs based on their resistance. The power consumed by a bulb can be calculated using the formula P = V^2/R, where V is the voltage and R is the resistance of the bulb.
Since the voltage source is 240V, the voltage across the bulbs will be divided in the ratio of their resistances. The resistance of the first bulb (30W, 220V) can be calculated as R1 = (V^2/P1) = (220^2/30) ohms. Similarly, the resistance of the second bulb (120W, 22V) can be calculated as R2 = (22^2/120) ohms.
The sum of the resistances R1 and R2 should be equal to the total resistance of the circuit, which is equal to the resistance of the voltage source. Therefore, R1 + R2 = 2400 ohms.
Now, let's calculate the powers P1 and P2. P1 = (220^2/R1) watts and P2 = (22^2/R2) watts.
Comparing the two powers, we can see that P1 is smaller than P2. Therefore, the statement "P1 < P2" is true.
The statement "P1 + P2 = 24W" is false because the sum of the powers P1 and P2 depends on the resistances of the bulbs, which are not given in the question.
The statement "P2 = 4.8W" is also false because the power P2 depends on the resistance of the second bulb, which is not given in the question.
The statement "R1 + R2 = 2400 ohms" is true because the sum of the resistances R1 and R2 should be equal to the total resistance of the circuit, which is equal to the resistance of the voltage source.