ABSA 4TH CLASS PART A REVIEW QUESTIONS WELL ANSWERED.

ABSA 4TH CLASS PART A REVIEW
QUESTIONS WELL ANSWERED.



When applying to write a Power Engineer certificate of competency examination, the candidate must:
Select one:

a. Undergo mandatory drug testing

b. Hold the next lower class of qualification

c. Pass a criminal records check

d. Pass both a written and oral examination ANS - b. Hold the next lower class of qualification



A machine lifts a load of 12kN with an applied effort of 4kN. What distance will the load move if the
effort moves a distance of 8m and the efficiency of the machine is 70%?

Select one:

a. 0.54 m

b. 3.81 m

c. 1.87 m

d. 0.38 m ANS - c. 1.87 m



Which of these is the "Mechanical Refrigeration Code"?

Select one:

a. ASME MRC

b. CSA B51.

c. CSA B52.

d. ASME Section I. ANS - c. CSA B52.

,In order to ensure safe and continuous operation of a pressure reducing valve, the valve station should
have _________________.

Select one:

a. A safety valve on the high-pressure side

b. A bypass line, plus a safety valve and pressure gauge on the low-pressure side

c. Thermometers on the inlet and outlet piping

d. A strainer immediately downstream of the valve ANS - b. A bypass line, plus a safety valve and
pressure gauge on the low-pressure side



If the power dissipated by a resistor is 1.2 kW when supplied with 110 V, the amperage will be _____ A.
Select one:

a. 91.666

b. 19.006

c. 10.91

d. 132 ANS - c. 10.91



The inclined "U" tube manometer:

Select one:

a. Will measure pressure in MPa

b. Can only be used with mercury

c. Is more accurate than the "U" tube manometer

d. Is more difficult to read than the U-tube manometer ANS - c. Is more accurate than the "U" tube
manometer



A valve which gives good throttling action, takes less actuator force, but does not seal well is a: Select
one:

a. Double seated valve

b. Reverse acting valve

c. Single seated valve

d. Direct acting valve ANS - a. Double seated valve

,The main component of any computer is the:

Select one:

a. Keyboard

b. Screen

c. Memory

d. Central processing unit ANS - d. Central processing unit



In most sizes of pipe, Schedule 40 corresponds to _____ wall thickness. Select one:

a. Welded only

b. Threaded only

c. Extra strong (XS)

d. Standard ANS - d. Standard



A reducing agent or fuel could be:

Select one:

a. Carbon monoxide

b. A heavy metal oxide

c. Hydrogen peroxide

d. Concentrated Sulphuric acid ANS - a. Carbon monoxide



A control device which will change one form of energy into another form of energy is the: Select one:

a. Logic device

b. Primary element

c. Transducer

d. Transmitter ANS - c. Transducer



The __________ valve requires specific and routine lubrication.

Select one:

, a. Butterfly

b. Globe

c. Check

d. Tapered plug ANS - d. Tapered plug



With reference to scalars and vectors, a space diagram:

Select one:

a. Shows the relationship of time to the vector.

b. Illustrates a system of vectors.

c. Shows the relationship of the scalar to the vector.

d. Illustrates a system of scalars. ANS - b. Illustrates a system of vectors



Brass and bronze are alloys of:

Select one:

a. iron

b. copper

c. aluminum

d. lead ANS - b. copper



PLC's for Burner Management Systems can:

Select one:

a. Have limited field configurations

b. Be used without any field testing

c. Be set up by technicians at burner repair companies

d. Be programmed by operators ANS - a. Have limited field configurations



Which is the workers responsibility?

Select one:

a. Co-operating with others on workplace safety and health