4th Class ABSA Exam Part A Practice Questions and Answers Solved 100% Correct

4th Class ABSA Exam Part A Practice Questions and Answers Solved 100% Correct Absolute pressure is: -Answer-gauge pressure plus atmospheric pressure The motion of moving parts is _____ by friction: A: Prevented B: Improved C: controlled D: resisted E: Regulated -Answer-D: resisted Voltage is a) the rate of current flow b) the rate of electron flow c) electromotive force d) Kinetic energy e) A form of power -Answer-c) electromotive force The resistance of a conductor is affected by: 1. Cross section area 2. Length 3. Temperature 4. Type of material a) 1,2,3 b) 1,2,4 c) 1,3 d) 1,2,3,4 e) 1,2 -Answer-d) 1,2,3,4 The movement of electrons in a conductor can be measured in: a) Amperes b) Ohms c) Volts d) Watts e) Micrometer -Answer-a) Amperes An electric motor has a 3/4 horse power output rating. Calculate the rating in kilowatts: a) 0.56 b) 0.75 c) 0.70 d) 7.5 e) 1.005 -Answer-a) 0.56 The connection provided on DC motors to supply the armature with power: a) are slip rings b) are field poses c) is a rheostat d) commutator e) is a rotating conductor -Answer-d) commutator The unit for the oppostion to current flow is the: a) volt b) amperes c) ohm d) watt e) resistance -Answer-c) ohm In an electric circuit protected by a single fuse the current flowing through the fuse must be: a) Equal to the voltage in the circuit b) Equal to the resistance in the circuit c) All of the current in the circuit d) Equal to the rated value of the fuse e) 1.732 times the applied current -Answer-d) Equal to the rated value of the fuse Electric overloads may be due to 1. Applying too heavy load to an electric motor 2. Lightning strike 3. A short circuit 4. Overloading a circuit with too many devices 5. Addition of circuit breakers a) 1,2,3,4 b) 1,3,4,5 c) 1,2,5 d) 2,3,4 e) 1,3,5 -Answer-a) 1,2,3,4 Since the discovery of electrons, it has been determined that electrons are a negative charge and flow from: Select one: a. positive to negative b. north to south c. south to north d. a lower potential to a higher pot