Section 4 HYDRAULIC, PNEUMATIC AND ELECTRICAL SYSTEMS

Question 1

52. When preforming preventative maintenance, the hydraulic fluid has a milky colour. What is done?

Answer 1

A. Change the fluid and the filters.
B. Add methanol to the fluid.
C. Remove one quarter of the fluid, then top up.
D. Replace all of the seals on the hydraulic equipment.

Question 2

53. Refer to Figure 44. Which component failure will cause the hand pump handle to drop?

Answer 2

A. 5
B. 10
C. 13
D. 28

Question 3

54. Refer to Figure 60. Where is a dew point analyzer installed to measure instrument air?

Answer 3

A. A
B. B
C. C
D. D

Question 4

55. Refer to Figure 43. The piston at the bottom of the stroke is 0% open. Which adjustment will change the zero setting to 5% open?

Answer 4

A. Slide component 2 towards the pivot
B. Slide component 2 away from the pivot.
C. Increase spring tension using adjustment 1.
D. Decrease spring tension using adjustment 1.

Question 5

56. A heater has failed in an instrument air dryer. What is the result?

Answer 5

A. Dew point increases.
B. Dew point decreases.
C. Inlet temperature increases.
D. Inlet temperature decreases.

Question 6

57. Refer to Figure 43. A piston’s travel varies 10% up and down with a steady input signal of 50%. What is the cause?

Answer 6

A. Loose positioner drive rod.
B. Leaking piston cup seals.
C. Incorrect positioning cam.
D. Weak positioning spring.

Question 7

58. What is the procedure for connecting 120 Vac to a process analyzer?

Answer 7

A. Connect black to line, green to neutral, then white to ground.
B. Connect white to line, black to neutral, then green to ground.
C. Connect green to ground, white to neutral, then black to line.
D. Connect green to line, white to neutral, then black to ground.

Question 8

59. What is done to check the condition of a fuse in a live circuit?

Answer 8

A. Connect an ohmmeter across the fuse.
B. Connect a voltmeter in series with the fuse.
C. Connect an ammeter across the fuse.
D. Connect a voltmeter across the fuse.

Question 9

60. A panel-mounted 4-20 mA analog indicator continuously indicates 50% with a 12 mA signal. What does this indicate?

Answer 9

A. Power is off.
B. Display is correct.
C. There is no input.
D. Calibration is incorrect.

Question 10

61. Which control relay is used to replace an SPDT 24 Vdc coil relay with 5 A contacts?

Answer 10

A. SPDT, 24 Vdc coil, 3 A contacts.
B. SPDT, 48 Vdc coil, 5 A contacts.
C. DPDT, 24 Vdc coil, 5 A contacts.
D. DPDT, 24 Vdc coil, 10 A contacts.