The car is moving up on the 12o inclined road with horizontal at 36 km/h which is having wheelbase 1.4 m. The C. G. of the car is 0.9 m above the road. The coefficient of friction is 0.7. What is the retardation of the car if the brakes are applied to all the four wheels?
A. 8.75 m/s2
B. 8.81 m/s2
C. 7.71 m/s2
D. 6.81 m/s2
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If the car is moving on the level road at a speed of 50 km/h has a wheelbase 3 m, a distance of C.G. from ground 700 mm and distance from rear wheels is 1.1 m. Coefficient of friction is 0.7. What is the retardation if the brakes are applied to the rear wheels?
A. 3.7 m/s2
B. 2. 7 m/s2
C. 1.7 m/s2
D. 4.7 m/s2
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The most suitable material for a brake drum is
A. Cast aluminium having cast iron bonded fins
B. Cast iron
C. Cast iron having aluminium bonded fins
D. Aluminium
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Select the better arrangement of shoes for manually operated hydraulic brake system
A. One leading, one trailing shoe
B. Both leading shoes
C. Both trailing shoes
D. Any of the arrangement
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In what position should the brake pedal be kept when a bleed screw is loosened?
A. Slightly depressed
B. Depressed half-way
C. Fully depressed
D. Fully released
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The brake pipes in hydraulic brake system are made of
A. Rubber
B. Steel
C. Pvc
D. Aluminium
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The function of master cylinder in hydraulic brakes is to
A. Builds up hydraulic pressure to operate the brakes
B. Maintains constant volume of fluid in the system
C. Serves as a pump to force air out of the hydraulic system
D. All of the above
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In a disc brake, which component provides the pad-to-disc adjustment?
A. Bleed screw
B. Piston
C. Caliper
D. Piston seal
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Which of the following phrases correctly describes the function of the brake?
A. To change speed
B. To stop in emergency
C. To couple the engine to the road wheels
D. To decelerate the automobile
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Desired slip rate in case of ABS of a road vehicle is:
A. 0%
B. 10 - 30%
C. 100%
D. 80 - 90%
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Aluminium conducts . . . . . . . . heat than cast iron.
A. More
B. Less
C. Equal
D. None of these
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The parking brakes fall into which of the following classifications?
A. Mechanical
B. Pneumatic
C. Hydraulic
D. Air-over-hydraulics
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Braking is produced by the frictional contact between the brake drum and
A. Brake shoe return spring
B. Wheel cylinders piston
C. Expanding cam
D. Brake shoes
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The role of antilock brake system (ABS) is that
A. It reduces the vehicle's stopping distances
B. It minimizes brake fade
C. It maintains directional control during braking by preventing the wheels from locking
D. It prevents nose dives during braking and thereby postpones locking of the wheels
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The pistons in the front wheel cylinders as compared to those in rear wheel cylinders in hydraulic brake system are
A. Larger
B. Smaller
C. Of the same size
D. None of the above
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The process of removing air from the brake system is known as
A. Bleeding
B. Self energizing
C. Servo action
D. Energization
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. . . . . . . . section is the cross-section of the brake shoe?
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The car is moving down on the 14° inclined road with horizontal at 36 km/h which is having wheelbase 1.4 m. The C. G. of the car is 0.9 m above the road. The coefficient of friction is 0.75. What is the retardation of the car if the brakes are applied to all the four wheels?
A. 4.76 m/s2
B. 5.76 m/s2
C. 6.76 m/s2
D. 7.76 m/s2
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The difference between DOT 3 and DOT 4 fluid is that the
A. DOT 4 fluid has a higher boiling point the DOT 3 fluid
B. DOT 3 fluid has a higher boiling point than DOT 4 fluid
C. DOT 3 and dot 4 fluids have the same boiling point, but DOT 4 fluid has a longer service life
D. DOT 4 fluid is more resistant to freezing than DOT 3 fluid
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Following brake can never become self-locking
A. Disk brake
B. Block brake
C. Band brake
D. All of the above
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