CEM Practice Questions

A.  

A range around a set point with no change in state even though there is a change in sensor input

B.  

A system which changes the output of a controller based on how fast a variable is moving from or to a set point

C.  

The delay in response of a system to a controlled change

D.  

A value that has been assigned to a controlled variable

E.  

The difference between a sensor variable and its set point

A.  

The time at which lamps begin to fail

B.  

The time at which 50% of a large sample of lamps have failed

C.  

The time at which 70% of a large sample of lamps have failed

D.  

The time at which lumen output has reduced by 50%

E.  

The time at which lumen output has reduced to 70% of the initial light output

A.  

It satisfies indoor ventilation rates by preconditioning outdoor air with the exhaust air to decrease energy cost during cold, warm, or humid weather

B.  

It's a prescriptive procedure in which outdoor air intake rates are calculated based on the energy cost method that compares a proposed building design to a base annual energy cost design

C.  

It's a building standard for enclosed spaces in which biological, chemical, and physical contaminants are considered to meet thermal comfort requirements

D.  

It's an active evaluation of outdoor and indoor space conditions to determine the amount of thermal, mechanical and natural conditioning that is required

A.  

Pressure

B.  

Volume

C.  

Distance

D.  

Voltage

A.  

Heat pipe

B.  

Shell and tube

C.  

Ceramic recuperator

D.  

Desiccant heat wheel

E.  

Run-around system

A.  

13°C

B.  

17°C

C.  

21°C

D.  

25°C

A.  

Rebalance single-phase loads

B.  

Install harmonic filters

C.  

Install capacitors to improve power factor on three-phase loads

D.  

Reverse phase connections on three-phase motors

A.  

4.2 liter/second

B.  

6.2 liter/second

C.  

9.2 liter/second

D.  

12.0 liter/second

A.  

$124,620

B.  

$146,907

C.  

$200,000

D.  

$330,660

E.  

$496,991