ABSA 3A2 Exam |434 questions with accurate answers
____ is often the first indicator of fire, so a system of automatic
detectors should be used.
Heat.
Smell.
Carbon dioxide.
High pressure.
Smoke. Ans✓✓✓ Smoke.
________ valve bodies in general can be used on water service up to
temperatures of about 250°C.
a. Brass
b. Steel
c. Steel alloys
d. Cast-iron
e. Stainless steel Ans✓✓✓ d. Cast-iron
,________ was developed at the U.S. Naval Research Laboratory
primarily to provide very rapid fire extinguishment or knockdown
capabilities.
ARC.
PFC.
DFFG.
AFFF.
NFPA. Ans✓✓✓ AFFF.
__________ are used to convert physical quantities of flow, level,
temperature, pressure, and weight into electrical signals that represent
those quantities as accurately as possible.
a. controllers
b. control valves
c. transmitters
d. level switches Ans✓✓✓ c. transmitters
1. The most common type of industrial electrical generation is:
,A. Single phase
B. Two phase
C. DC generators
D. Three phase
E. AC motors Ans✓✓✓ D. Three phase
10. Paralleling alternators require the following conditions:
1. It must be in phase with the system
2. The incoming alternator must be the same voltage as the system
3. Its phase sequence must be the same as the system
4. Alternator frequency and system frequency must be the same
A. 1, 3, 4
B. 1, 2, 3
C. 2, 3, 4
D. 1, 2, 4
E. 1, 2, 3, 4 Ans✓✓✓ E. 1, 2, 3, 4
11. To take an alternator off the line in a system involving two or more
alternators, the driving torque of the prime mover of the alternator to be
removed should be reduced until it is supplying no current to the
busbars.
, A. True
B. False Ans✓✓✓ A. True
12. For paralleling alternators, the incoming alternator must be the same
___________ as the system voltage.
A. manufacturer
B. conductance
C. voltage
D. amperage Ans✓✓✓ C. voltage
13. The most common type of rotor used in induction motors is the
squirrel cage rotor.
A. True
B. False Ans✓✓✓ A. True
14. The stator of the induction motor is identical to that of the three-
phase alternator.
A. True
B. False Ans✓✓✓ A. True
15. Wound rotor induction motors:
____ is often the first indicator of fire, so a system of automatic
detectors should be used.
Heat.
Smell.
Carbon dioxide.
High pressure.
Smoke. Ans✓✓✓ Smoke.
________ valve bodies in general can be used on water service up to
temperatures of about 250°C.
a. Brass
b. Steel
c. Steel alloys
d. Cast-iron
e. Stainless steel Ans✓✓✓ d. Cast-iron
,________ was developed at the U.S. Naval Research Laboratory
primarily to provide very rapid fire extinguishment or knockdown
capabilities.
ARC.
PFC.
DFFG.
AFFF.
NFPA. Ans✓✓✓ AFFF.
__________ are used to convert physical quantities of flow, level,
temperature, pressure, and weight into electrical signals that represent
those quantities as accurately as possible.
a. controllers
b. control valves
c. transmitters
d. level switches Ans✓✓✓ c. transmitters
1. The most common type of industrial electrical generation is:
,A. Single phase
B. Two phase
C. DC generators
D. Three phase
E. AC motors Ans✓✓✓ D. Three phase
10. Paralleling alternators require the following conditions:
1. It must be in phase with the system
2. The incoming alternator must be the same voltage as the system
3. Its phase sequence must be the same as the system
4. Alternator frequency and system frequency must be the same
A. 1, 3, 4
B. 1, 2, 3
C. 2, 3, 4
D. 1, 2, 4
E. 1, 2, 3, 4 Ans✓✓✓ E. 1, 2, 3, 4
11. To take an alternator off the line in a system involving two or more
alternators, the driving torque of the prime mover of the alternator to be
removed should be reduced until it is supplying no current to the
busbars.
, A. True
B. False Ans✓✓✓ A. True
12. For paralleling alternators, the incoming alternator must be the same
___________ as the system voltage.
A. manufacturer
B. conductance
C. voltage
D. amperage Ans✓✓✓ C. voltage
13. The most common type of rotor used in induction motors is the
squirrel cage rotor.
A. True
B. False Ans✓✓✓ A. True
14. The stator of the induction motor is identical to that of the three-
phase alternator.
A. True
B. False Ans✓✓✓ A. True
15. Wound rotor induction motors:
