Small Medium HEX 4

Small Medium HEX 4

Professional Development

10 Qs

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Small Medium HEX 4

Small Medium HEX 4

Assessment

Quiz

Other

Professional Development

Practice Problem

Medium

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apriyadi masan

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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Di 320 NGH, pilot pressure dihasilkan oleh:

Suplai aliran Main hydraulic pump 1

Pilot pump yang terdapat pump compartment

Main hydraulic pump 2 yang direduksi oleh PRV

External pump yang diambil dari tangka tambahan

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Proportional Reducing Valve Solenoid berfungsi untuk:

Mengatur downstream pressure ke spool

Mengatur pembukaan tekanan oli ke tangki

Membuka jalur menuju ke return oil manifold

Menyupali oli ke main system ketika terjadi penurunan tekanan

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

320D Implement low cycle time hanya pada saat beroperasi secara kombinasi terus menerus,

salah satu kemungkinan penyebabnya adalah:

Setting pilot relief low

Pilot pump problem

Hydraulic lock out valve stuck

Pilot accumulator fail

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Proportional solenoid valve pada NGH dioperasikan oleh ECM dengan signal:

Analog

CAN Bus

Pulse Width Modulation

Data link

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Resolver block menjadi pertemuan antara pilot lines ke joysticks dan pilot lines main control valve

group dan juga sebagai sensing saat ada implement atau swing yang sedang diaktifkan:

Benar

Salah

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Pada unit 320D2, pompa hidrolik utama dikontrol oleh pump regulator yang menggunakan sinyal

berupa:

Pilot pressure relief valve & Output pump 1 pressure

Line relief valve & Main relief valve

Negative flow control & Differential valve

Power shift pressure reducing valve & Negative flow control

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Pada unit excavator yang menggunakan sistem LSPC, jika sinyal tekanan Load Sensing

bertambah, maka dampak yang terjadi pada pompa adalah:

Main pump tidak akan terpengaruh

Pilot pump akan mengalami upstroke dan menambah signal pressure

Main pump akan mengalami upstroke untuk menambah flow

Engine mengalami kenaikan rpm

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