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Worksheets

Block 14 (DC)

Total questions: 37

Worksheet time: 19mins

Name
Class
Date
1.

A 12VDC battery provides potential for what 3 things

a)

SM, S3, S4

b)

S3, CB4, H6

c)

SM, H5, S4

d)

SM, S3, H4

2.

CB4 is a ___ AMP circuit breaker that protects the ____ From excessive current

a)

30 AMP & Engine Control Circuits

b)

25 AMP & Ignition System (IS)

c)

15 AMP & Heater Control Unit

d)

20 AMP & Burner Control Unit

3.

If CB4 is ___ the engine will not start

a)

Open

b)

Reset

c)

Closed

d)

Locked

4.

S3 is a 4 position switch, what are the 4 positions

a)

Preheat, Off, On and Start

b)

Preheat, Idle, Run, and Stop

c)

Off, Preheat, Operate, and Cool Down

d)

Off, Standby, Run, and Start

5.

S4 turns on what 2 lights

a)

Panel Light (H5) & Engine Compartment Light (H6)

b)

Preheat Light (H4) & Charge Light (H3)

c)

Engine Compartment Light (H6) & Preheat Light (H4)

d)

Both Fog Lights

6.

The preheater is used when the ambient air temperature is ?

a)

Below 32°F

b)

Above 32°F

c)

Below 24°F

d)

Below 0°F

7.

Hold S3 (Ign. Switch) in the "Preheat" position for ___

a)

30 seconds

b)

15 seconds

c)

45 seconds

d)

60 seconds

8.

The preheater will warm the air in the ____

a)

engine intake manifold

b)

burner assembly housing

c)

combustion air chamber

d)

heat exchanger inlet

9.

S3 in the ON position sends potential to ?

a)

H4

b)

CR

c)

PRE

d)

G2

10.

Charge Light (H3) will illuminate when

a)

Alternator output is low

b)

Batteries aren’t charging

c)

Voltage regulator malfunctions

d)

Battery connections are loose

11.

S3 in the ON position also energized ____

a)

Fuel Transfer Pump

b)

Ignition System

c)

Burner Control Unit

d)

Engine Control Relay

12.

S3 in the START position Energizes ____

a)

Fuel transfer pump

b)

Starter motor solenoid

c)

Engine Control Relay

d)

Ignition System

13.

What provides the initial rotation of the engine

a)

Starter Motor

b)

Blower Motor

c)

Diesel Engine

d)

Alternator

14.

With the engine operating the charge coil (G2) will produce ___

a)

30 - 40 VAC

b)

30 - 40 VDC

c)

13.3 - 17.7 VAC

d)

13.3 - 14.7 VDC

15.

The Charge Regulator (CR) will change 30 - 40 VAC to ____ for Battery charging

a)

30 - 40 VAC

b)

30 - 40 VDC

c)

13.3 - 17.7 VAC

d)

13.3 - 14.7 VDC

16.

What protects the charging circuit

a)

SM

b)

CB4

c)

CB5

d)

OPS

17.

How many AMPs is CB5

a)

30

b)

25

c)

40

d)

15

18.

OPS will ___ when oil pressure goes ___ this is normal operation

a)

Open & Above 7 PSI

b)

Close & Above 7 PSI

c)

Open & Below 7 PSI

d)

Close & Above 10 PSI

19.

The Bridge Rectifier (BR) rectifies AC to DC for the ____

a)

Engine Hour Meter (P4), Oil alarm light (H2), Shutdown relay (K3) and Engine Shutoff Switch (S5)

b)

Glow Plugs (GP), Alternator Field (AF), Cooling Fan Relay (CFR), and Voltage Regulator (VR)

c)

Heater Control Unit (HCU), Burner Control Unit (BCU), Safety Interlock (SI), and Temperature Sensor (TS)

20.

Oil pressure switch is normally ___

a)

Open

b)

Closed

c)

Manually operated

d)

Erased from existence

21.

OPS will open when oil pressure goes above ___ PSI

a)

5

b)

7

c)

15

d)

12

22.

due to low oil pressure OPS will provide ground for?

a)

Shutdown Relay (K3) & Oil Alarm Light (H2)

b)

Safety Interlock (SI) & Engine Hour Meter (P4)

c)

Fuel Solenoid Valve (FSV) & Ignition Relay (IR)

d)

Engine Control Unit (ECU) & Warning Buzzer (WB)

23.

____ will energize to stop engine operation

a)

Shutdown Relay (K3)

b)

Engine Shut off button (S5)

c)

OPS

d)

Emergency Stop

24.

Where is S5 located

a)

Burner Tube

b)

Control Panel

c)

Alternator

d)

Emergency Panel

25.

When S5 is pushed closed it will create a ground for?

a)

H2, SM

b)

K3, H2

c)

SM, SS

d)

K3, G2

26.

What can provide ground to K3 causing it to energize

a)

OPS or S5

b)

S5 & K3

c)

K3 & H2

d)

G2 & SS

27.

When Engine shutdown relay (K3) energizes it extends potential to ____

a)

Shutdown Solenoid (SS)

b)

Oil Pressure Switch (OPS)

c)

Shutdown Relay (K3)

d)

Engine Shutoff Button (S5)

28.

The shutdown solenoid when energized will cause the governor to move into a ____ position

a)

No-Fuel

b)

Full-Fuel

c)

On

d)

Stop

29.

What happens if the ignition switch (S3) is in the ON position when shutdown occurs

a)

H3 & H2 Illuminate

b)

H4 & H2 Illuminate

c)

The engine re-powers

d)

Nothing

30.

The battery in the NGH is a ___ VDC automotive style battery.

a)

12

b)

24

c)

120

d)

64

31.

What switch is used to energize the starter motor solenoid?

a)

S3 in the start position

b)

S3 in the off position

c)

S3 in the on position

d)

S3 in the preheat position

32.

What component produces AC voltage after the engine has
been started?

a)

G2

b)

G1

c)

H1

d)

OPS

33.

AC voltage is rectified by the ___ for battery charging.

a)

Charge Regulator

b)

Control Panel

c)

Alternator

d)

TR

34.

The charge light illuminates when the battery is charging.

a)

True

b)

False

35.

The shutdown solenoid is energized by

a)

Shutdown Solenoid (SS)

b)

Oil Pressure Switch (OPS)

c)

Shutdown Relay (K3)

d)

Engine Shutoff Button (S5)

36.

What component will push the governor to a no-fuel position

a)

Shutdown Solenoid (SS)

b)

Oil Pressure Switch (OPS)

c)

Shutdown Relay (K3)

d)

Engine Shutoff Button (S5)

37.

What happens if the ignition switch is in the ON position when shut down happens

a)

SM, S3 Close

b)

S3, CB4 Activate

c)

H3, H2 Illuminate

d)

SM, S3, H4 Open