The brake pedal during ABS operation

How does the brake pedal behave during ABS operation?

A

It is pushed upwards forcefully

B

It transmits slight kickback to the drivers foot

C

The pedal stroke becomes longer

D

Nothing happens

A single cylinder, four stroke cycle oil engine is fitted with a rope brake. The diameter of the brake wheel is 600 mm and the rope diameter is 26 mm. The dead load on the brake is 200 N and the spring balance reads 30 N. If the engine runs at 450 r.p.m., what will be the brake power of the engine?

A

2 kW

B

2.5 kW

C

3 kW

D

3.5 kW

The sequence in which the force is transmitted through a brake system when the brake pedal is depressed is

A

Brake pedal, Master cylinder, Brake lines, Vacuum servo mechanism, Brake pads

B

Brake pedal, Vacuum servo mechanism, Master cylinder, Brake lines, Brake pads

C

Brake pedal, Master cylinder, Vacuum servo mechanism, Brake lines, Brake pads

D

Brake pedal, Brake lines, Vacuum servo mechanism, Master cylinder, Brake pads

In the power assisted brake system, movement of the brake pedal

A

Increases the hydraulic pressure which actuates the control valve

B

Actuates the valve in the bellows through linkage

C

Actuates the valve to admit atmospheric pressure to one side of the diaphragm

D

None of these

In the multiplier power brake system, movement of the brake pedal

A

Increases the hydraulic pressure which actuates the control valve

B

Actuates the valve in the bellows through linkage

C

Actuates the valve to admit atmospheric pressure to one side of the diaphragm

D

None of these

How much is the torque developed if a 400 V DC shunt motor gave the following readings during the brake test: Length of brake arm = 200 cm Reading of spring balance at the end of brake arm = 40 kg-wt Supply voltage = 400 V

A

784.6 N-m

B

784.7 N-m

C

784.8 N-m

D

784.9 N-m

The brake power (B.P.) of the engine is given by (where W = Brake load or dead load in newtons, l = Length of arm in meters, N = Speed of engine in r.p.m., S = Spring balance reading in newtons, D = Dia. of brake drum in meters, and d = Dia. of rope in meters)

A

B.P = (Wl × 2πN)/60 watts

B

B.P = [(W - S) πDN]/60 watts

C

B.P = [(W - S) π (D + d) N]/60 watts

D

All of these

A 25 kg mass moving with 25 m/s is brought to a complete stop with a constant deceleration over a period of 5 seconds by a brake system. The brake energy is absorbed by 0.5kg water initially at 100 kPa, 20°C. Assume that the mass is at constant P and T. Find the energy the brake removes from the mass assuming P = C.

A

7.6125 kJ

B

7.7125 kJ

C

7.8125 kJ

D

7.9125 kJ

The brake power (B.P.) of the engine is given by (where W = Brake load or dead load in newtons, $$l$$ = Length of arm in meters, N = Speed of engine in r.p.m., S = Spring balance reading in newtons, D = Diameter of brake drum in meters and d = Diameter of rope in meters)

A

$${\text{B}}{\text{.P}}{\text{.}} = \frac{{{\text{W}}l \times 2\pi {\text{N}}}}{{60}}{\text{ watts}}$$

B

$${\text{B}}{\text{.P}}{\text{.}} = \frac{{\left( {{\text{W}} - {\text{S}}} \right)\pi {\text{DN}}}}{{60}}{\text{ watts}}$$

C

$${\text{B}}{\text{.P}}{\text{.}} = \frac{{\left( {{\text{W}} - {\text{S}}} \right)\pi \left( {{\text{D}} + {\text{d}}} \right){\text{N}}}}{{60}}{\text{ watts}}$$

D

All of these

When the brake pedal free play is less than the specified value, then the

A

Brake drags

B

Brake fades

C

Vapour locking occurs in the brake lines

D

Antilock braking system malfunctions

The brake pedal during ABS operation

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