30 câu hỏi
What is the purpose of tire rotation on automobiles?
Avoid ply separation
Equalize wear
Get better ride
Reduce bump
Which are the two materials used in a bimetallic piston?
Copper and steel
Magnesium and aluminum
Steel and cast iron
Aluminum and steel
By adding which of the following material to aluminum alloy piston slap can be avoided?
Silicon
Zinc
Copper
Lead
Which among the following casting process is used in the casting of the piston?
Investment casting
Low-pressure casting
Sand casting
Gravity die casting
In a disc brake, which component provides the pad-to-disc adjustment?
Bleed screw
Piston
Caliper
Piston seal
On what principle does the braking system in the car work?
Frictional force
Gravitational force
Magnetic force
Electric force
Which of the following is not a method to avoid piston slap?
Taper piston
Piston with T-slots
Offset piston
Increase the size of the piston skirt
Which is the material used to wound on a wire wound piston?
Steel
Lead
Zinc
Magnesium
Which among the following type is named when the silicon content is 12% in an aluminum alloy?
Eutectic
Hyper-eutectic
Hypo-eutectic
Pearlite
Which of the following is the main reason for a burnt piston?
Hot air intake
Leak of coolant
More clearance
Detonation
Which material is coated on the piston to increase the service life?
Tin
Zinc
Lead
Cadmium
Which of the following material is used in the manufacturing of the connecting rod?
Magnesium
Copper
Bronze
Steel
What is the percentage of carbon present in a medium carbon steel type connecting rod?
0-0.1
0.1-0.2
0.25-0.35
0.35-0.45
In splash lubrication, the spout is attached to with part of the connecting rod?
Piston
Shank
Big end
Small end
Which among the following material is plated on the cylinder liner to improve the resistance to corrosion and wear?
Cast iron
Chromium
Zinc
Lead
Which type of casting process is used to cast cylinder liners?
Centrifugal casting
Investment casting
Die casting
Sand casting
Which among the following material is most commonly used in the manufacturing of cylinder liner?
Titanium
Copper
Brass
Grey cast iron
What is the percentage of carbon present in a cast steel type crankshaft?
0-1
2-4
1.35-1.6
4-6
Exhaust manifolds are usually made of what material?
Copper
Chromoly
Mild steel
Cast iron
Which of the following material is the most commonly used in the construction of crankshaft?
Cast steel
Bronze
Copper
Lead
Camshaft gear is made from which material?
Cast iron
Mild steel
Bakelite
Brass
Cylinder liner materials are made of alloy iron containing ____________
Manganese
Nickel
Chromium
All of the mentioned
Aluminium cylinder blocks require __________
Cast iron Liners
Brass Liners
Aluminium Liners
No Liners
Which of the following is the most important property of the lubricant?
Density
Thermal conductivity
Viscosity
Melting point
Which of the following viscosity indices shows the larger changes in viscosity with temperature?
50
100
45
10
Which of the following of oils is multi-grade oil?
SAE 10W 30
SAE 25W
SAE 10
SAE 20W
Which of the following oils has the highest viscosity?
SAE 20
SAE 10
SAE 50
SAE 45
Which of the following is not a part of the transmission system?
Clutch
Axles
Wheels
Gear box
The electrical system of an automobile contains which of the following?
Battery
Alternators
Lighting systems
All of the mentioned
The electrical system of an automobile contains which of the following?
Battery
Alternators
Lighting systems
All of the mentioned