Explore topic-wise InterviewSolutions in Current Affairs.

Correct option: A) Pre- approach

Contents of service manual are as follows: 

a. Index 

b. How to use service manual 

c. Periodic maintenance activities 

d. Standard shop practices and safety 

e. List of spare parts and their part number 

f. Disassembly and assembly procedures of different units like engine, gearbox etc. 

g. Standard tolerances, adjustment and serviceability of each component 

h. Testing procedure and workability

The function of Steering Gear box is to convert rotary movement of steering wheel into reciprocating motion of the drag link.

Correct option: c) scrub radius

Amount of steering axis inclination should be between 5° to 12°.

Correct option: a. Parallel

Correct answer is a) steel ruler 

Correct option: a. Engine control Module

Heating ventilation and air conditioning. It is the technology for indoor and automotive ambient comfort. It facilitates in managing pleasant climate inside the cabin by controlling the degree of hotness coolness:

It comprises five major components. 

1) Evaporator 

2) Compressor 

3) Condenser 

4) Receiver / Driver 

5) Expansion device

Immersion Rod: 

• Elements end may touch the corner of the metal tube which is known as short circuit and earth fault. 
• Connections of supply cord may be broken at the terminals; breakage of wire in the plug top which causes discontinuity and known as open circuit. 
• Breakage of element wire in the metal tube or element may burnt which is known as open circuit. 
• Leakage in supply cord which causes short circuit or cord too old. 
• Metal tube may be burst when not dipped inside the water. 
• Terminal housing may be broken which may cause leakage fault. 
• Any screw may be missing which causes loose fitting or connections. 

Geyser: 

• Failing of Supply Mains. Fuses blown or the blades of the main switch do not make contact with main blades or supply is cut off in the main switch. 
• Open and Short Circuit in the Wiring Circuit. Breakage of wire ends from the terminals or breakage inside the wires and touching of wire ends together or bare wire may touch together somewhere. 
• Heating Element may be defective. Element may be burnt. It can be checked with series test lamp by disconnecting the main connections 
• Thermostat device may be defective. Setting may be not proper or there may be leakage. 

Mixer: 

• If the tip bowl leaks 
• If the blades are broken 
• If the switch knob is loose 
• If the motor burns 
• If the blade does not rotate properly (freely) 

Room Cooler: 

• Blower does not throw cool air 
• Pump may not be working properly 
• Motor fails to start 
• Room cooler gives shock

The chemical used in automotive batteries is a solution (liquid combination) of 36% sulphuric acid and 64% water. This electrolyte is used for both leadantimony and lead calcium (maintenance free) batteries. The chemical symbol for this sulphuric acid solution is H₂SO₄

H = symbol for hydrogen (the subscript 2 means that there are two atoms of hydrogen)

S = symbol for sulphur

O = symbol for oxygen (the subscript 4 indicates that there are four atoms of oxygen)

Correct option: a. Domestic Sewing Machine

Correct option: b. automotive navigation system

Hooke’s joint is a type of Cross or spider type joint. It is most common type of universal joint widely used in automobiles because of the fact that it is simple in construction and reasonable efficient at small angles (generally up to 200 angle) of up and down movement of propeller shaft.

This led to the setting up of Isaac Singer.

Correct option: b. 1851

Correct answer is a) Volt Ohm meter 

1) Prick punch 

2) spanner

Correct answer is b) 0.01 mm 

LEAST COUNT = PITCH / TOTAL NO OF DIVISION IN CIRCULAR SCALE.

= 0.5 MM / 50 = 0.001 MM

Following steps are involved in inspecting accidental car:

a) Get Vehicle details 

b) A small diagram indicating the area of damage. Different impacts are marked separately; primary impacts are indicated with 'XXX' and secondary impacts with 'OOO.'

c) The repair work required to get the vehicle back to its pre-accident condition: new parts needed, repairs to panels, any specialist work including geometry check and jigs, and a breakdown of the costs involved is identified.

Merits of an air-cooling system:

• Air-cooled engines operate extremely well in both hot and cold climates.

• Air-cooled engines are lighter than similar sized liquid/ water cooled engines. 

• Air-cooled engines have no coolant leakage or freezing problems.

Demerits of an air-cooling system: 

• The large quantities of intake air passing into the cooling system can make the engine noisy. 

• Each cylinder has to be separately cast, whereas a rigid mono block construction is used by liquid/ water-cooled engines. 

• To increase the air-cooling effect, an oil heat exchanger is required to prevent overheating of the lubricant.

Hydrometer is used to measure specific gravity of the electrolyte of the battery. It consists of a glass tubular body with a rubber bulb at the top and a sampler tube at the bottom. There is a glass float inside the glass body. There is a mark inside the glass (red & green). This glass float has a vertical density scale. To test the specific gravity of the electrolyte.

The main role of the engine oil is to move the any system such as the piston in cylinder and the crankshaft smoothly. 

In order to achieve the objective:

• The oil forms an oil film at the metal surface to reduce the friction between the metal surfaces. 

• The engine oil doesn’t allow the combusted gas to leak to the crankcase. 

• It cools the pistons and valves. It gives washing action to the cylinder wall by moving away the micro particles (impurities) to the sump. 

• It reduces the shock, transmitted from the piston to the crankshaft.

Given:

Length of each trains = 125 m 

Speed of train 1 = 18 m/s

Speed of train 2 = 22 m/s

Concept Used:

When 2 trains move in the opposite direction, the relative speed is the sum of their speeds.

Formula Used:

Speed = Distance/Time

Calculations:

Let the time after which 2 trains will cross each other be t secs.

(18 + 22) = (125 + 125)/t

⇒ t = 250/40

⇒ t = 25/4 secs

∴ The time in which 2 trains will cross each other is 25/4 secs.

The cut-out relay is a safety device for battery. When the generator speed is very low, due to which the output is not sufficient to balance the battery voltage, the necessity to cut out the generator from the battery arises, because otherwise the battery would discharge into the generator. When the engine and hence the generator speed has reached a sufficiently higher value to match its output to the battery voltage the generator should be automatically connected to the battery.

A hoist is a device used for lifting or lowering load, operated by means of mechanically, electrically, pneumatically or hydraulically.

Hoists can be classified according to the operating system as: 

• Hydraulic hoist, 

• Pneumatic hoist, 

• Mechanical hoist, and 

• Electric hoist

a) Shock absorbers improve riding comfort. 

b) It keeps the tyres evenly connected with the road and maintaining a vertical load on the tyres. 

c) It Reduces the effect of shock forces to the vehicle

• It connects the vehicle body and the wheels, and thus supports the weight of the vehicle.

• It transmits the driving and braking forces, which are generated due to friction between the road surface and the wheels, to the chassis and body, reduce the effect of shock forces to the occupants.

a)A person should have completed 16 years to obtain license for 2 wheelers without gear. 

b)A person should have completed 18 years age to obtain license for 2 wheelers with gear,

The cut-out relay is a safety device for battery. When the generator speed is very low, due to which the output is not sufficient to balance the battery voltage, the necessity to cut out the generator from the battery arises, because otherwise the battery would discharge into the generator. When the engine and hence the generator speed has reached a sufficiently higher value to match its output to the battery voltage the generator should be automatically connected to the battery.

• A person should have completed 16 years to obtain license for 2 wheelers without gear. 

• A person should have completed 18 years age to obtain license for 2 wheelers with gear,

Motor-car, Tractor and other non-transport vehicles.

The correct answer is World Heritage Sites.

• Khajuraho Group of Monuments has been declared by UNESCO as the World Heritage Sites.
• It is located in the State of Madhya Pradesh.
• Khajuraho temples were built during the period of the Chandella dynasty.
• Chandella dynasty ruled the region in the 10th and 11th centuries CE.
• The temples were built over a period of 100 years.
• It is believed that most of the Khajuraho temples were built between 885 AD and 1050 AD.

• Temples in Khajuraho Group of Monument belong to two different religions, Hinduism and Jainism.
• Temples in Khajuraho are famous for their nagara-style architecture.
• Originally there were 85 temples as a part of the Khajuraho Group of Monuments.
• At present, the number of temples reduced to 23 temples.
• It is maintained by the Archeological Survey of India.

The purpose of giving an inward inclination to king-pin or ball joint axis are: 

i) To keep the front wheels pointing forward. 

ii) To bring back the wheels in a straight position after a turn.

Inclination of king pin from vertical when viewed from the front of vehicle is called King Pin Inclination or King Pin Rake.

a. To keep the front wheels pointing forward. 

b. To bring back the wheels in a straight position after a turn.

Material and tools requirement for changing of the oil and oil filter are:

a. Engine Oil (4 or 5 liters – check the vehicle’s service manual) 

b. New oil filter - check vehicle’s service manual 

c. Safety glasses and rubber gloves 

d. Plastic container and funnel 

e. Car jack and jack stands

f. Drain plug socket wrench 

g. Paper towels and a rag 

h. Oil filter wrench

(a) Material and tools requirement for the changing of fuel filter 

1. Safety glasses or some other eye protection 

2. Replacement filter 

3. Screwdriver to undo clamps 

4. Container to catch fuel that leaks from hoses 

5. Rags to clean up any spilled fuel, dispose of them if used 

6. Specialty tools, some vehicles require the use of special tools to disconnect fuel fittings, including the fittings connecting the fuel filter

(b) Steps to be followed while changing fuel filter of a car: 

1. Take the suitable fuel filter 

2. Locate the old filter - it may be in the engine compartment or under the car near the fuel tank 

3. If the vehicle manufacturer has recommended any procedure, follow it to remove fuel pressure 

4. Unscrew each hose clamp bolt until it nearly comes apart from the nut 

5. Push the clamp up the hose 

6. Remove the old filter and replace with new filter 

7. Run the engine and check for leaks.

Fuel filter removes dirt  from fuel.

Correct answer is b) Air Blower