# Tata Hitachi "Be Safe, Stay At Home"

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| By Shoven Kumar
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Shoven Kumar
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Quizzes Created: 1 | Total Attempts: 70
Questions: 30 | Attempts: 70

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• 1.

### How do you check coil of a relay

• A.

Check Continuity

• B.

Check resistance

• C.

Check Voltage

• D.

Check multi meter

B. Check resistance
Explanation
To check the coil of a relay, you can use a multimeter to measure the resistance. The coil of a relay is typically a coil of wire, and by measuring the resistance, you can determine if the coil is intact and functioning properly. If the resistance is within the expected range, it indicates that the coil is in good condition. If the resistance is too high or too low, it may indicate a problem with the coil, such as a break or a short circuit. Therefore, checking the resistance is a reliable method to ensure the functionality of the relay coil.

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• 2.

### Pilot pressure is-

• A.

45 Bar

• B.

40 Bar

• C.

30 Bar

• D.

50 Bar

B. 40 Bar
Explanation
Pilot pressure refers to the pressure required to operate a control valve or actuator. In this case, the correct answer is 40 Bar, which means that a pilot pressure of 40 Bar is needed for the system to function properly.

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• 3.

### Battery relay is which type of relay

• A.

NO type

• B.

NC type

• C.

NO/NC type

• D.

None of the above

A.  NO type
Explanation
A battery relay is a type of relay that is normally open (NO) when the coil is not energized. When the coil is energized, the relay closes and completes the circuit, allowing current to flow. Therefore, the correct answer is "NO type".

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• 4.

### The location of anti drift valve as per oil flow-

• A.

Pump & spool

• B.

Spool & control valve

• C.

Spool & actuator

• D.

None

C. Spool & actuator
Explanation
The correct answer is "Spool & actuator". The anti drift valve is located between the spool and the actuator. This valve helps to prevent the actuator from drifting when there is no control signal applied to the spool.

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• 5.

### What is the recommended interval for air filter inner element cleaning-

• A.

No cleaning only replacement required

• B.

1000 Hrs

• C.

500 Hrs

• D.

250 Hrs

A. No cleaning only replacement required
Explanation
The recommended interval for air filter inner element cleaning is "No cleaning only replacement required." This means that instead of cleaning the air filter, it is recommended to replace it entirely.

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• 6.

### How many power modes are provided in Ex-200LC Super ?

• A.

Four

• B.

Three

• C.

Two

• D.

One

C. Two
Explanation
The correct answer is "Two". This suggests that there are only two power modes provided in the Ex-200LC Super.

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• 7.

### How to Check EC Motor and EC Sensor ?

• A.

Check resistance of motor coil and sensor

• B.

Check continuity of motor coil and sensor

• C.

Check voltage of motor coil and sensor

• D.

Check resistance of motor coil and voltage of sensor.

A. Check resistance of motor coil and sensor
Explanation
To check the EC motor and EC sensor, one should check the resistance of the motor coil and sensor. This is because the resistance value can indicate if there are any issues with the motor or sensor. If the resistance is too high or too low, it can indicate a problem with the components. By checking the resistance, one can determine if the motor and sensor are functioning properly.

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• 8.

### What is Function of PWM relays?

• A.

PWM relay controls main HP & EP mode

• B.

PWM relays used to control engine alarms

• C.

PWM relay controls Engine control motor forward & reverse direction

• D.

None of above

C. PWM relay controls Engine control motor forward & reverse direction
Explanation
The correct answer is that PWM relay controls the engine control motor forward and reverse direction. This means that the PWM relay is responsible for controlling the movement of the engine control motor in both the forward and reverse directions.

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• 9.

### Crossover relief valves associates with which operation

• A.

Boom

• B.

Arm

• C.

Swing

• D.

Bucket

C. Swing
Explanation
Crossover relief valves are associated with the swing operation.

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• 10.

### Function of bypass check valve is-

• A.

Directs the return oil to tank in cold condition

• B.

Directs the return oil to tank always

• C.

Directs the return oil to oil cooler

• D.

None

A. Directs the return oil to tank in cold condition
Explanation
The function of a bypass check valve is to direct the return oil to the tank in cold conditions. This means that when the oil is cold, the valve allows the oil to bypass the oil cooler and go directly back to the tank. This is important because cold oil needs to warm up before it can effectively cool the system, so bypassing the cooler in cold conditions helps to prevent damage to the system.

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• 11.

### Function of SH line is to-

• A.

Release parking brake of travel motor

• B.

Release parking brake of swing motor

• C.

To increase MRV setting during travel

• D.

None

B. Release parking brake of swing motor
Explanation
The correct answer is "Release parking brake of swing motor." The SH line is responsible for releasing the parking brake of the swing motor.

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• 12.

### The rating of a battery is in _________

• A.

Voltage

• B.

Ampere Hour

• C.

Current

• D.

None

B.  Ampere Hour
Explanation
The rating of a battery is measured in Ampere Hour. This is because Ampere Hour is a unit of electric charge, which represents the amount of charge that can be delivered or withdrawn from a battery. It indicates the capacity of the battery and how long it can sustain a given current. Voltage is a measure of the electric potential difference between two points, and current is the flow of electric charge. Neither of these directly represents the rating or capacity of a battery.

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• 13.

### Short circuit of wire will cause……………. In circuit:

• A.

Over Current

• B.

Over Voltage

• C.

Too low capacitance

• D.

Over Resistance

A. Over Current
Explanation
A short circuit of wire in a circuit can cause over current. When a short circuit occurs, it creates a low resistance path for the current to flow, bypassing the intended components. This leads to a sudden increase in current, which can exceed the rated capacity of the circuit and cause over current.

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• 14.

### Engine control motor used on EX Super series is interchangeable with ZX series EC motor

• A.

True

• B.

False

A. True
Explanation
The given statement is true. The engine control motor used on the EX Super series can be interchanged with the ZX series EC motor. This means that the motor can be used interchangeably between the two series without any compatibility issues or modifications required.

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• 15.

### The MRV pressure is-

• A.

285 kgf/cm2

• B.

350 kgf/cm2

• C.

390 kgf/cm2

• D.

285 /350 -kgf/cm2

D. 285 /350 -kgf/cm2
• 16.

### How to Check continuity of lengthy wire- Example Controller to EC Sensor.

• A.

Using extra length wire

• B.

Using Chasis Ground

B. Using Chasis Ground
Explanation
The correct answer is "Using Chasis Ground". To check the continuity of a lengthy wire, one can use the chassis ground as a reference point. By connecting one end of the wire to the chassis ground and the other end to the EC sensor, any breaks or interruptions in the wire can be detected. If there is continuity, it means that the wire is intact and functioning properly.

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• 17.

### The GPS system fitted in EX200 Super plus is-

• A.

Consite

• B.

Insite

• C.

Both consite & insite

• D.

None

B. Insite
Explanation
The correct answer is "Insite." This means that the GPS system fitted in the EX200 Super plus is called Insite.

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• 18.

### What is full form of PWM relay?

• A.

Power work mode relay

• B.

Pulse Width Modulation relay

• C.

Pulse wave mode relay

• D.

Power Wave Making Relay

B. Pulse Width Modulation relay
Explanation
The correct answer is "Pulse Width Modulation relay". PWM stands for Pulse Width Modulation, which is a technique used to control the average power delivered to a load by varying the width of the pulse signal. In the context of a relay, PWM relay refers to a relay that uses pulse width modulation to control the switching of the relay contacts. This allows for precise control of the relay operation and is commonly used in applications such as motor control, power inverters, and LED dimming.

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• 19.

### What is full function of DC – DC converter ?

• A.

DC-DC Converter supplies DC Voltage to Engine speed controller

• B.

DC- DC Converter supplies DC voltage to PWM relay, EC sensor and Switch Box

• C.

DC - DC relay supplies 5 volts to Engine control system

• D.

DC-DC Convertor not used in EX 200 super

B. DC- DC Converter supplies DC voltage to PWM relay, EC sensor and Switch Box
Explanation
The correct answer is "DC- DC Converter supplies DC voltage to PWM relay, EC sensor and Switch Box". This option states that the full function of a DC-DC converter is to supply DC voltage to a PWM relay, EC sensor, and Switch Box.

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• 20.

### Function of TS valve is-

• A.

Block the neutral line

• B.

Activate Straight Travel spool

• C.

Increase MRV pressure

• D.

None

B. Activate Straight Travel spool
Explanation
The correct answer is "Activate Straight Travel spool." The TS valve is responsible for activating the Straight Travel spool, which controls the movement of the hydraulic cylinder in a straight line.

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• 21.

### The working voltage of Auto idle Pressure sensors on EX-super series is :

• A.

10 Volts

• B.

6 Volts

• C.

5 Volts

• D.

24 Volts

D. 24 Volts
Explanation
The correct answer is 24 Volts. This means that the working voltage of Auto idle Pressure sensors on EX-super series is 24 Volts.

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• 22.

### The Hitachi color of wires  for Terminals 1 , 2  , 5  Respectively are:

• A.

Blue yellow , Yellow  Black , Purple

• B.

Yellow  Black, Purple , Blue yellow

• C.

Purple , Yellow Black , Blue yellow

• D.

Blue yellow , purple , Yellow Black

A.  Blue yellow , Yellow  Black , Purple
• 23.

### The image is -

• A.

Counter balance valve

• B.

Center Joint

• C.

Tee Body

• D.

None

B. Center Joint
Explanation
The correct answer is "Center Joint" because the image is not visible in the question. Without the image, it is not possible to determine the correct answer or provide an explanation.

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• 24.

### Please mention the how much voltage we get at point A and Point B

• A.

24V and 24V

• B.

24V and 12V

• C.

12V and 12V

• D.

12V and 24V

D. 12V and 24V
• 25.

### The circled component is-

• A.

Bypass shut out valve

• B.

TS valve

• C.

Counter balance valve

• D.

None

C. Counter balance valve
Explanation
The correct answer is "Counter balance valve" because the circled component in the question is most likely a counter balance valve. This type of valve is used to control the flow of fluid in a hydraulic system and maintain balance between the load and the pressure. It is typically installed in applications where there is a need to control the movement of heavy loads and prevent them from free-falling or collapsing due to gravity.

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• 26.

### There is a Diode in lamp circuit . Will the bulb Glow?

• A.

Yes

• B.

No

A. Yes
Explanation
The correct answer is "Yes". This is because a diode allows current to flow in only one direction. In a lamp circuit, when the diode is connected in the correct orientation, it will allow current to flow through the lamp, causing it to glow.

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• 27.

• A.

WG

• B.

WGR

• C.

GRW

• D.

GW

D. GW
• 28.

### Which type of spool it is?

• A.

Closed center open port

• B.

Open center closed port

• C.

Closed port closed center

• D.

Open port open center

B. Open center closed port
Explanation
The correct answer is "Open center closed port." This type of spool is characterized by having an open center, which allows fluid to flow freely when the spool is in neutral position. However, the ports are closed when the spool is shifted to one of the working positions, redirecting the flow of fluid.

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• 29.

### How many terminals are there for a NO/ NC  Relay

• A.

Five

• B.

Two

• C.

Three

• D.

Four

A. Five

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• Current Version
• Mar 21, 2023
Quiz Edited by
ProProfs Editorial Team
• Mar 31, 2020
Quiz Created by
Shoven Kumar

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