Question

1. the tool is used for

a. removing rust deposits
b. removing carbon deposits
c. attaching tools
d. joining cables

figure 2

1. the wheels connected along d in figure 2 are for

a. braking and weight support only
b. steering, driving and weight support
c. braking, driving and weight support
d. driving and braking only

1. if mr brown decided to purchase a vehicle that has a drive arrangement with a better road traction, it is most suitable to consider a vehicle with

a. a long steering mechanism
b. lower centre of gravity
c. an engine on the wheel
d. no propeller shaft tunnel

1. the purpose of the dowels found on an automobile crankshaft is to

a. provide 360° rotation of the crankshaft
b. ensure proper fastening of the bearing cap
c. ensure initial fastening of the flywheel
d. provide firm connection of the connecting rod

1. the engine parts that force poppet valves to open and close are

a. rocker shaft and spring
b. camshaft and spring
c. crankshaft and spring
d. spring and pushrod

(figure 3 text: the sketch in figure 3 shows a part in the valve operating mechanism of an automobile engine. part h is under question 9 and 10.)

1. the sketch is probably a type of

a. valve stem
b. valve guide
c. valve spring
d. valve seat

1. one effect of wear on the part labelled h

a. valve burning
b. loss of power
c. valve pitting
d. vapour lock

1. one reason for atomisation of petrol in an automobile carburettor is

a. for faster warming up of the engine
b. for faster vapourisation of the petrol
c. to increase the engine speed
d. to reduce the tendency of fuel starvation

1. the constant level of fuel in a carburettor is maintained by the

a. main jet
b. float chamber
c. float
d. venturi

1. a fuel injection pump is driven by the

a. crankshaft
b. camshaft
c. rocker shaft
d. pinion

Answer:

To solve these automotive engineering - related multiple - choice questions, we analyze each one based on automotive engineering knowledge:

Question 4 (assuming it's about a tool)

• Analysis of options:
• Option A: Removing metal deposits is not the function of a typical tool for tube - related work.
• Option B: Removing carbon deposits is also not related to the tool shown (likely for tube work).
• Option C: The tool in Figure 2 is for cutting tubes. So this option is correct.
• Option D: Joining tubes has a different tool setup than the one shown.
• Answer: C. cutting tubes

Question 5 (wheels connected along D in Figure 2)

• Analysis of options:
• Option A: Wheels do more than just braking and weight support. Steering and driving are also involved.
• Option B: Steering is done by the steering system, not the wheels connected along D.
• Option C: The wheels connected along D (axle - mounted wheels) are for braking, driving, and weight support. This is correct as wheels transmit driving force, support the vehicle's weight, and are part of the braking system.
• Option D: They are not just for driving and braking; weight support is also a key function.
• Answer: C. braking, driving and weight support

Question 6 (vehicle with better road traction)

• Analysis of options:
• Option A: A long steering mechanism has no direct relation to road traction.
• Option B: A lower center of gravity improves stability, not directly traction.
• Option C: An engine on the wheel (like in some electric or hub - motor vehicles) can provide better traction as the weight of the engine on the drive wheel increases the normal force and thus traction. This is correct.
• Option D: No propeller shaft tunnel is more about interior space and has no relation to traction.
• Answer: C. an engine on the wheel

Question 7 (dowels on automobile crankshaft)

• Analysis of options:
• Option A: Dowels don't provide 360° rotation of the crankshaft. Bearings and the crankshaft's design do that.
• Option B: Dowels on the crankshaft ensure proper fastening of the bearing cap. They align and hold the bearing cap in place. This is correct.
• Option C: Flywheel fastening is done by bolts, not dowels on the crankshaft.
• Option D: Connecting rod connection is via bolts and bearings, not dowels on the crankshaft.
• Answer: B. ensure proper fastening of the bearing cap

Question 8 (engine parts for poppet valves)

• Analysis of options:
• Option A: Rocker shaft is part of the valvetrain but the spring is for closing the valve, not forcing it to open. The camshaft lobes force the valve to open.
• Option B: The camshaft has lobes that push on the valve train components (like lifters, pushrods, rockers) to open the poppet valves, and the spring closes them. So camshaft and spring are involved (camshaft to open, spring to close). This is correct.
• Option C: Crankshaft is for engine rotation and power transmission, not valve operation.
• Option D: Pushrod is a part of the valvetrain but the spring and pushrod alone don't force the valve to open; the camshaft is the main component for opening.
• Answer: B. camshaft and spring

Question 9 (Figure 3 - type of valve part)

• Analysis of options:
• Option A: Valve stem is the rod - like part of the valve, not the part shown in Figure 3 (which looks like a guide).
• Option B: Valve guide is the component that guides the valve stem. The sketch in Figure 3 represents a valve guide. This is correct.
• Option C: Valve spring is a coiled spring, not the part shown.
• Option D: Valve seat is the part the valve closes against, not the part in the sketch.
• Answer: B. valve guide

Question 10 (effect of wear on labeled part)

• Analysis of options:
• Option A: Valve burning is due to high temperatures, not wear of the part (likely valve guide or stem).
• Option B: Wear in the valve train (like the part labeled) can lead to improper valve timing or sealing, which can cause loss of power. This is a possible effect.
• Option C: Valve pitting is due to corrosion or poor fuel quality, not wear.
• Option D: Vapour lock is a fuel - related issue, not related to valve train wear.
• Answer: B. loss of power

Question 11 (reason for atomization of automobile carburetor)

• Analysis of options:
• Option A: Faster warming up of the engine is related to the cooling system or engine design, not carburetor atomization.
• Option B: Atomization of fuel in the carburetor is to increase the surface area of the fuel for faster vaporization, which helps in better combustion. This is correct.
• Option C: Atomization doesn't increase engine speed directly; it improves combustion efficiency.
• Option D: Reducing the tendency of fire is not related to fuel atomization.
• Answer: B. for faster vaporisation of the fuel

Question 12 (constant fuel level in carburetor)

• Analysis of options:
• Option A: Main jet controls fuel flow for power, not fuel level.
• Option B: Float chamber has a float that controls the fuel inlet valve to maintain a constant fuel level. This is correct.
• Option C: Float is part of the float chamber system, but the float chamber as a whole (with float and inlet valve) maintains the level.
• Option D: Venturi is for creating a low - pressure area for fuel suction, not fuel level control.
• Answer: B. float chamber

Question 13 (fuel injection pump drive)

• Analysis of options:
• Option A: Crankshaft is for engine rotation and powering accessories, but the fuel injection pump is usually driven by the camshaft.
• Option B: Camshaft has lobes that can drive the fuel injection pump (in some engine designs). This is correct.
• Option C: Rocker shaft is part of the valvetrain, not for driving the fuel injection pump.
• Option D: Pinion is part of the gear train, not typically for fuel injection pump drive.
• Answer: B. camshaft